MH-S-MF1080

MMaasssseeyy HHaarr rr iissMMaasssseeyy FFeerrgguussoonn

Service ManualMF1080

THIS IS A MANUAL PRODUCED BY JENSALES INC. WITHOUT THE AUTHORIZATION OF MASSEY HARRIS MASSEY FERGUSON OR IT’S SUCCESSORS. MASSEY HARRIS MASSEY FERGUSON AND IT’S SUCCESSORS

ARE NOT RESPONSIBLE FOR THE QUALITY OR ACCURACY OF THIS MANUAL.

TRADE MARKS AND TRADE NAMES CONTAINED AND USED HEREIN ARE THOSE OF OTHERS, AND ARE USED HERE IN A DESCRIPTIVE SENSE TO REFER TO THE PRODUCTS OF OTHERS.

Serv

ice

Man

ual

MF 1080 TRACTOR

INDEX

PART 1 -Service Infol'mation ..................................................... .

PART 2 -Engine .......................•...........................................

PART 3 -Clutch ......................................................•.............

PART 4 -Transmission ............•........... -:.-.......•.............•.............

PART SA and 5B -Dri\'e Axlf' ............•.........................................

PART 6 -Hydl'aulics ................•...••...........................•.............

PART 7 -Po,ver Take-Off ........•••...•..•.... ~ .......•...........................

PART 8 -B1·akes .......................................•...........................

PART ~I ..:.._Front Axle and Steering .......•..........................................

PART 10 -Electrical System:,; ........•....•..........•.................. '. ........... .

' PART 11 -Cah and Ca h Sygtt~ms ............................................•........

PART 1-SERVICE INFORMATION

INDEX

PAGE SERVICE RECOMMENDATIONS AND DATA ......................... 1 LUBRICATION AND CAPACITIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 CONDENSED SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

This Part provides certain work practices and specific data concerning the complete Tractor that may be of valuable aid to the serviceman. Many areas are discussed which may be overlooked, even by an experienced serviceman.

Condensed specifications are included for convenience in obtaining often used references.

TRANSMISSION:

Type .................................................................................. Multi-Power Number of Sliding Spur Gears ( change speed) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Planetary Reduction at Output End of Main Shaft .................................................. Yes Number of Speed Selections Available . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 forward & 4 reverse

DRIVE AXLE:

Planetary Type:

Spiral Bevel Gear Reduction .............................................................. 3.90:1 3-Pinion Planetary Final Reduction ......................................................... 4.24:1 Total Rear Axle Reduction ............................................................... 16.52:1

Differential Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mechanically applied

BRAKES:

Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Double-disc, mechanically actuated Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7" diameter

INTERNAL HYDRAULICS (3-POINT LINKAGE):

Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 cylinder, Scotch yoke, piston type Pump Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 gpm @ 2000 engine rpm @ 2500 psi Control Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Oscillating type at inlet side of pump

POWER TAKE-OFF:

Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Independent PTO Speeds:

With 540 Type Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 540 rpm@ 1720 engine rpm With 1000 Type Adapter .............................................. 1000 rpm@ 2000 engine rpm

PART 2 - ENGINE INDEX

PAGE

GENERAL INFORMATION AND TROUBLE-SHOOTING 1 Introduction ................................................................... . 1 Engine Serial Number Location ................................................... . 1 Engine Trouble-Shooting ......................................................... . 1

ENGINE SPECIFICATIONS .......................................................... . 14 General Specifications .......................................................... . 14 Torque Tension Specifications .................................................... . 14 Engine Overhaul Specifications ................................................... . 15 Lubrication System Specifications ................................................. . 17 Fuel System Specifications ....................................................... . 18 Cooling System Specifications .................................................... . 19 Electrical System Specifications ................................................... . 19

ENGINE OVERHAUL PROCEDURES .................................................. . 21 Engine Description .................................................... : ........ . 21 Engine Removal ............................................................... . 22 Engine Installation ............................................................... . 25 Adjusting Valve Clearance ....................................................... . 26 Cylinder Head ......................................... : ........ ·,,· ............. . 27 Removing Cylinder Head .......................................... / .............. . 27 Disassembly and Inspection of Cylinder Head ........................................ . 28 Valve Guides .................................................................. . 29 Valves ............................... : ........................ : .............. . 29

Removal and Inspection ..................................................... . 30 Servicing the Valves ......................................................... . 30

Valve Seats ............................... • .................................... . 30 Inspection ....................................................... · ......... . 31 Servicing the Valve Seats ..................................................... . 31 Installing Exhaust Valve Seat Inserts .......................... , ................. . 31

Valve Springs .......................................... , ........................ . 32

MF 1080 Engine

.;.

INDEX (Continued)

Rocker Arm Shaft Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Inspection and Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Reassembly ........................... · . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Reassembling Cylinder Head .......... _. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Installing Cylinder Head .......................................................... 35 Engine Balancer Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Principle of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Removing Engine Balancer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Disassembling Engine Balancer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Inspection and Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Reassembling Engine Balancer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Installing Engine Balancer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Piston and Connecting Rod Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Removing Piston and Connecting Rod Assemblies ................................... 42 Separating Pistons from Connecting Rods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Connecting Rods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Piston Pins ................................................................. 43 Pistons and Rings ............................................................ 43 Installing Pistons Onto Connecting Rods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 Installing Piston and Connecting Rod Assemblies ................................... 44

Cylinder Liners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Inspecting and Servicing the Cylinder Liners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Replacing the Cylinder Liners .................................................. 46

Timing Gear Cover and Front Crankshaft Oil Seal ...................................... 47 Removing Timing Gear Cover .................................................. 47 Oil Seal Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Replacing the Front Oil Seal ................................................... 48 Installing the Timing Gear Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Timing Gears . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 Timing Gear Backlash ......................................................... 49 Removing Timing Gears ............................... ; . . . . . . . . . . . . . . . . . . . . . . . 50 Installing Timing Gears and Retiming Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Camshaft ...................................................................... 53 Removing the Camshaft ....................................................... 53 Inspecting the Camshaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Tappets ................................................................... 54 Installing the Camshaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Checking Valve Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Timing Gear Housing ..................... · ........................................ 55 Crankshaft and Main Bearings ............. ; . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Crankshaft End-Play . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 Removing the Crankshaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 Inspecting the Crankshaft .................................. ·. . . . . . . . . . . . . . . . . . . 59 Regrinding the Crankshaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 Installing the Crankshaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Rear Crankshaft Oil Seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Removing Oil Seal Retainers ................................................... 61 Oil Seal Replacement ......................................................... 61 Installing Oil Seal Retainers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Engine Flywheel ................................................................ 62 Removing the Flywheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 Replacing the Flywheel Ring Gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 Installing the Flywheel .......................................... .' . . . . . . . . . . . . . 63

ii

' .:· __ .,..·

LUBRICATION SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 Motor Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ·55 Oil Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 Oil Pan ........................................................................ 66

Removing the Oil Pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 Installing the Oil Pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Lubricating Oil Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 Replacing Oil Filter Element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Oil Pump ...................................................................... 68 Removing the Oil Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 Disassembling the Oil Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 Inspecting the Oil Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 Reassembling and Installing the Oil Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

FUEL AND AIR SYSTEM ............................................................. 70 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 Air Cleaner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Cleaning the Filter Element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 Air-Bleeding the Fuel System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 Fuel Lift Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

Removing Fuel Lift Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 Disassembling Fuel Lift Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 Cleaning and Inspecting Parts ................................................... 75 Reassembling Fuel Lift Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 Installing Fuel Lift Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Fuel Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 Replacing Fuel Filter Elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Fuel Injection Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 Removing Fuel Injection Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 Installing Fuel Injection Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 Checking and Adjusting Throttle Linkage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 Checking and Adjusting Engine Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 Checking and Adjusting Fuel Injection Pump Timing ................................ 82

Fuel Injectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84 Fuel Injector Trouble-Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84 Removing Injectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 Installing Injectors ........................................................... 86 Servicing the Injectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Nozzle Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86 Injector Difficulties ............................................. , . . . . . . . . . 89 Disassembling Injectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89 Cleaning and Assembling Injectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Fuel Lines and Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

COOLING SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 Fan Belt ....................................................................... 95 Thermostat ....... ··. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Replacing the Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 Testing the Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Water Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 Removing the Water Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

- Disassembling the Water Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 ._ Inspection ............................... _. ................ ,. . . . . . . . . . . . . . . . . . 98

Reassembling the Water Pump ....................... , . . . . . . . . . . . . . . . . . . . . . . . . . 98 Installing the Water Pump ................... ·. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

iii MF 1080 Engine

Fig. 14- INTAKE AND EXHAUST VALVE ASSEMBLIES

intake and exhaust valves are manufactured with 45 degree angle faces.

All of the valves and the bottom face of the cylinder head are numbered to show the correct valve locations. Refer to Fig. 13, showing the arrangement of the intake and exhaust valves.

The valves, valve springs and retaining assemblies are shown in Fig. 14.

REMOVAL AND INSPECTION

To remove valves, use a valve spring com­pressor. Place valves in a numbered rack so, if they are to be re-used, they may be installed into their original valve guides. The original valves are numbered from the front of the engine.

Carefully clean and inspect all valves. Dis­card any valves that have heads which are warped, burned, cracked, cupped, pitted or worn too thin to allow a minimum finished valve head margin of 1/32 inch. Also replace valves that have scored stems or worn retainer lock grooves. If valves appear to be in good condition, mea­sure stem diameters to determine amount of wear present. Replace valves having worn stem diameters of 0.371 inch or less.

SERVICING THE VALVES

New and old valves, which are only slightly pitted or burned, should be refaced with suitable

refacing equipment as follows:

NOTE: Several different makes of equip­ment are available for servicing the valves. Make sure to follow manufacturer's operat­ing instructions for particular type of equip­ment being used.

1. Dress grinding wheel as required, to make certain it is true and smooth.

2. Set chuck at a 45° angle for both the in­take and exhaust valves.

3. Clamp valve stem in chuck of the ma­chine.

4. Start machine and move valve head in line with grinder wheel. Turn feed screw UNTIL VALVE FACE JUST LIGHTLY CONTACTS THE WHEEL.

5. Then turn valve and pencil mark high spot on head of valve. Rechuck valve one-half turn from original position and repeat Step 4. If high spots are in same location on valve face for both valve positions, valve is warped. If high spots occur in different locations on valve face, investigate and correct cause before proceed­ing. Check chuck alignment, bearings in ma­chine and for presence of foreign particles.

6. Lightly wet-grind valves until the valve face is true and smooth all around valve. Take light cuts and do not remove any more material from valve face than is necessary. If finished valve margin is less than 1/32 inch thick, the valve should be replaced because of danger of burning and cupping.

7. Remove valve from chuck and resurface rocker arm end of valve stem if required. Install stem in "V" Block and feed valve squarely against grinding wheel to remove any slight wear or pitting from end of stem.

NOTE: Only extreme end of valve stem is hardened. Do not grind end excessively.

8. Clean finished valves and valve seats of grinding particles. Then check valves for proper contact with seats in cylinder head as outlined under heading "Valve Seats".

VALVE SEATS

The intake and exhaust valves seat directly

-30-

PART 3-CLUTCH

INDEX

PAGE SERVICE INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

SEPARATING/ REJOINING THE TRACTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

SERVICING CLUTCH ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Removing/ Installing Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Reassembly ....................................................... 4

CHECKING I ADJUSTING CLUTCH LINKAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

BOLT PATTERN -ENGINE TO TRANSMISSION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

TROUBLE - SHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

If you already have an MF 1080 Service Manual, replace the Contents sheet and add the remaining pages after page 18 under Part 4.

PART 4-TRANSMISSIONS "IM PORT ANT"

Refer to "CHANGES" AFFECTING SERVICE ... to obtain the latest procedure recommenda­tions and service data brought about by changes in the Tractor.

MULTI-POWER CONTENTS

PAGE

SERVICE INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

DESCRIPTION AND OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

REMOVING THE TRANSMISSION (SEE "CHANGES") . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

INSTALLING THE TRANSMISSION (SEE "CHANGES") . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

CONTROL LINKAGE ADJUSTMENT (SEE "CHANGES") . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

DISASSEMBLY, INSPECTION AND REASSEMBLY OF THE TRANSMISSION (SEE "CHANGES") . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Shifter Forks and Rails . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Planetary Assembly (See "CHANGES") . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Main Shaft and "Change Speed" Gears (See "CHANGES") . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 PTO Main Shaft Retainer and Pinion Assembly (See "CHANGES") . . . . . . . . . . . . . . . . . . . . . . . . 8 Shift Control Valve Assembly (See "CHANGES") ...................................... 11 Main Input Shaft ................................................................ 12 Hydraulic Clutch Pack (See "CHANGES") ........................................... 13 PTO Front Shaft and Gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Countershaft and Related Gears ................................................... 15 Reverse Cluster Gear Assembly ................................................... 17

"CHANGES" AFFECTING SERVICE

SUPPLEMENTAL SERVICE DATA AND PROCEDURES .................................... 19 Removing/Installing Transmission - Tractors Without Cab ............................. 19 Removing/Installing Transmission - Tractors With Cab ................................ 19 Control Linkage Adjustment ...................................................... 19 Checking Multi-Power Oil Pressure ................................................. 20 Disassembly, Inspection and Reassembly of the Transmission ............ , ............... 20

MULTI-POWER TRANSMISSION MF 1080 TRACTOR

DISASSEMBLY, INSPECTION AND RE­ASSEMBLY OF TRANSMISSION

The pictures referred to show the transmission com­pletely removed from the Tractor and being entirely disassembled. This may not be required. See text under "Removing the Transmission."

The instructions are separated into sub-headings which provide complete procedures pertaining to the subject named. The transmission may be completely disassembled and the named subjects repaired by following the instructions under all sub-headings. Par­tial disassembly and repair may be done by referring to the sub-heading and following the procedures given.

SHIFTER FORKS AND RAILS

Refer to Fig. 9. Transmission must be separated from center housing

and top cover removed.

1. Remove forks and rails as follows:

a. Loosen setscrew in planetary shift fork then slide fork with coupler from planetary shift rail.

b. Remove neutral switch and detent springs.

c. Remove detent pins.

d. Remove rail stop plate.

e. Remove locking setscrews from planetary shift selector, low and reverse shifter fork and intermediate and high shifter fork.

f. Slide shifter rails from transmission case and re­move shifter forks and planetary shift selector.

2. Reinstall shifter forks and rails as follows:

NOTE: Prior to reinstalling the shifter forks ancl mils, all other parts of the trunsmission should be assembled.

Fig. 9 - Top View of Transmission Assembly 1. Shift Rod 5. Planetary Shift Selector 2. Detent Springs (3) 6. Rail Stop Plate 3. Neutral Safety Switch 7. Planetary Shifter Fork 4. Shifter Forks - Gear Change

-5-

a. Drop shifter forks into position on the "change speed" gears.

b. Slide planetary shifter rail through the transmis­sion and start planetary shift selector over its shifter rail. The forked portion of the selector is to be "up" and toward the outside of the transmission case ( ie: setscrew toward outside of case.)

c. Slide planetary shifter rail forward into the trans­mission case and to its limit. Position selector on rail and tighten setscrew. The notch on rail is to be up.

d. Slide shifter rails through the transmission case and the shifter forks.

NOTE: Make sure that the cutaway portion at the rear of the shifter rails will align properly with the rail stop plate ancl pin.

e. Push shifter rails forward to their limits and secure with setscrews in shift forks.

f. Position rail stop plate and pin against the rear of the transmission and secure with bolts.

g. Place planetary shift fork into coupler and insert coupler into planetary, while at the same time, piloting the shift fork over rail. Secure with setscrew.

h. Drop detent pins and springs into their respective ports and lockwire setscrews on shifter forks and shift selector in position. Install "neutral safety" switch.

Fig. 1 O - Planetary End of Transmission Assembly 1. Planetary Shifter Fork 3. Special Retaining Bolt 2. Coupler 4. Retaining Bolts w/Lockwashers (3 each)

PLANETARY ASSEMBLY

Transmission must be separated from center hous­ing only.

1. Remove planetary as follows: Refer to Fig. 10.

a. Remove the planetary shift fork and coupler from rail.

b. Remove bolts securing planetary to transmis­sion case.

MUL Tl-POWER

PART 5A- DRIVE AXLE

PART 5 - DRIVE AXLE

MASTER CONTENTS PAGE

Information in this Part applies to Tractors built prior to 98 25507, assembly numbers 516420 and 516435.

Refer to Part 58, Identification, for a serial number list of exceptions.

PART 58 -. DRIVE AXLE

Information in this Part applies to Tractors built after 98 25507, with exceptions as listed under the "Identification" heading in Part 58.

This axle type can be identified by the straight edged ring gear on the axle planetary, and the use of notches instead of holes, in the axle housing for fender support mounting.

MF 1080 - Drive Axle

PART SA - DRIVE AXLE This Part applies to tractors built before S.N. 9B 25507, with axle assembly numbers 516420 and

516435. These axles are commonly called malleable iron axles. See Part 5B for list of serial numbers and exceptions.

Refer to Fig. 1 for identification of this axle type.

SPECIFICATIONS SPECIAL TOOLS

CONTENTS

Page

11

ll

REMOVAL (Disconnecting Center Housing From Transmission) . . . . . 1 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 CENTER HOUSING BRIDGE-PIECE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 REAR WHEEL ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 AXLE PLANETARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Bearing Pre-Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 AXLE SHAFT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 AXLE HOUSING ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 CARRIER PLATE ................................................. 11 DIFFERENTIAL LOCK ............................................ 13 CENTER HOUSING ........................................... _ .... 15 DRIVE PINION ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Bearing Pre-Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 DIFFERENTIAL ASSEMBLY ........ -. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Carrier Bearing Pre-Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Fig. 1 - Drive Axle - Rear View

516420 M91 FV321

Typical Assembly Typical Serial Number Number

PART SB - DRIVE AXLE

For Tractors built after Serial Number 9B 25507, with exceptions as listed in the "Identification" heading.

Axle assembly number 522103 is the first of this axle type on this model, commonly referred to as Cast Iron Axles.

CONTENTS PAGE

IDENTIFICATION ii Serial Number Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii

SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv Faster Torque Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv

SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 REMOVAL (Separating Center Housing from Transmission) ............................... . INSTALLATION (Rejoining) ......................................................... . REAR WHEELS ................................................................... . AXLE PLANETARY ................................................................ .

Bearing Pre-Load ............................................................. . AXLE SHAFT SERVICING .......................................................... . AXLE HOUSING ASSEMBLY ........................................................ .

Carrier Plate .................................................. -............... . Differential Lock .............................................................. .

DIFFERENTIAL ASSEMBLY ........................................................ . Carrier Bearing Pre-Load ....................................................... .

DRIVE PINION ASSEMBLY ......................................................... . Bearing Pre-Load ............................................................. .

CENTER HOUSING ............................................................... .

Fig. A- CAST IRON TYPE DRIVE AXLE- MF 1080

2 4 4 5 6

11 12 14 15 17 19 24 30 31

MF 1080 DRIVE AXLE 58-i

PART 6 - HYDRAULICS

PAGE

SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

TROUBLE-SHOOT! NG

3-POINT LINKAGE HYDRAULICS

CONTENTS

2 Quick Service Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Problem Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

HYDRAULIC LIFT COVER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Removal - Tractors Without Cab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Installation - Tractors Without Cab ............................................ '.... . 7 Removal - Tractors With Cab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Installation - Tractors With Cab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Servicing Master Control Spring .................................................... 18

ADJUSTMENTS .................................................................... 20 Pressure Control Valve Adjustment ................................................. 20 Lift Cover Adjustments .................................................. · ......... 20 "Final" Adjustments ............... , ............................................. 23

FERGUSON HYDRAULIC PUMP ....................................................... 28 Removal/Installation ............................................................ 28,<t·\_;"5"

Servicing Pump ................................................................. 34 Servicing Control Valve and Oscillator ............................................... 38 Servicing Inlet/Outlet Valve Chambers ........................ : ...................... 40 Servicing Pressure Control Valve ................................................... 4 ~

AUXILIARY HYDRAULICS

CONTENTS

PUMP ASSEMBLY AND DRIVE TRAIN .................................................. 43 Disassembly ................................................................... 43 Inspection ..................................................................... 45 Reassembly ............................. · ....................... ·-· ...... _ ........ 45

AUXILIARY CONTROL VALVES ........................................................ 48 Disassembly ................................................................... 48 Inspection ..................................................................... 50 Reassembly .................................................................... 51

Printed in U.S.A. MF 1080 Hydraulics

I I

PART 7 - POWER TAKE-OFF

INDEX

Page SERVICE INFORMATION ............................................ 1

DESCRIPTION AND OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

POWER TAKE-OFF SHAFT ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Removal ......................................................... 1 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

CLUTCH AND VALVE ASSEMBLY .................................... 3

Removal ......................................................... 3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

PRESSURE REGULA TING VALVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Removal ......................................................... 6 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Disassembly .... · . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

HYDRAULIC PUMP ................................................. , 7

TROUBLE-SHOOTING ............................................... · 7

)

' / ,,.

PART 8 - BRAKES

CONTENTS

PAGE

7" BRAKES (Malleable Iron Axle Housings*) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Removal .................................................................................... 1 Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Actuating Disc Assembly Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3. ln~:1::!~: .·: ·. ·. ·.· .·: : ·. ·.· .·: : .. ·.· .· .' : .. ·.· .· .': .. ·.· .· .' : .. ·.· .· .' : .. ·.· .· .': .. ·.· .· .' : ...... · .' : ...... · .' : .. ·.· .· .' : ...... ·/~t~:!''.'. . !"

8-3/4" BRAKES (Cast Iron Axle Housings*) ...................................................... . Brake Disc Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . •. -. Actuating Disc Assembly Servicing .......................................................... . Adjustment - See Adjustment of 7" Brakes ................................................. .

See Also: Parts 5A and 5B for Axle Housing Assembly Removal and Installation

*Refer to Part 5B for Axle type identification

SEE ALSO: Part 5 for Axle Housing Assembly Removal & Installation

t~ 6 4

PART 9 - FRONT AXLE AND STEERING

"IM PORT ANT"

Refer to "CHANGES" AFFECTING SERVICE ... to obtain the latest procedure recommendation and service data brought about by changes in the Tractor.

CONTENTS

FILLING THE STEERING RESERVOIR

PAGE

1

ENGINE-DRIVEN STEERING PUMP - MF PART NO. 517 022 M93 (See "Changes") . . . . . . . . . . . 1

ENGINE-DRIVEN STEERING PUMP - MF PART NO. 523 089 M91 . . . . . . . . . . . . . . . . . . . . . . . . . . 10

POWER STEERING RACK-WITHOUT RACK GUIDE (See "Changes") . . . . . . . . . . . . . . . . . . . . . . . . 3

POWER STEERING RACK-WITH RACK GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

HYDROSTATIC HAND PUMP (See "Changes") . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

FRONT AXLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Toe-In .. ,.; .................................................................. 8 Wheel Bearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Steering System Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

TROUBLE-SHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

"CHANGES" AFFECTING SERVICE

SUPPLEMENTAL SERVICE DATA AND PROCEDURES ................................... . Engine-Driven Steering Pump .................................................... . Power Steering Rack ........................................................... . Hydrostatic Hand Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii

STEERING

)

PART 10-ELECTRICAL SYSTEMS

INDEX

Page

ELECTRICAL SCHEMATIC (INCLUDING INSTRUMENTS & LIGHTING) . . . . . . . . . . . . . . . . . . 2-3

INSTRUMENT WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

INSTRUMENT, LIGHTING AND VOLTAGE REGULATOR WIRING 4

ALTERNATOR (AC GENERATOR) WIRING CONNECTIONS . . . . . . . 4

ELECTRICAL WIRING ILLUSTRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

LIGHT WIRING ILLUSTRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ,6

This Part contains self-explanatory pictures, illustrations and diagrams that may be used when trouble-shooting ( or servicing) the electrical systems on the

... MF 1080 Tractor.

PART 11 - CAB AND CAB SYSTEMS

CONTENTS

PAGE

REMOV!NG/INSTALLING CAB ................................ ;_.................... ii

AIR CONDITIONING - CONTENTS ................................... , .... , ........... 1 Safety Precautions ..................... · . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Servicing the Refrigeration System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Servicing the System Components .............................. , ................... 11 Servicing the Non-Refrigeration System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... 15 Service Diagnosis ......................................... , ..................... 18

IMPORTANT This Part does not include the electrical wiring for the cab lighting, windshield wiper, heater fan pressure fan. etc. Information pertaining to the wiring is contained in Part 10 - Electrical Sy~­tems {electrical system schematic is also included within the Operator's Manual},

-i- Cab and Cab Systems - MF 1080

AIR CONDITIONING

CONTENTS

SAFETY PRECAUTIONS

PAGE

2

DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Refrigerant Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Handling Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Special Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

SERVICING THE REFRIGERATION SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Performance Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Attaching the Gauge Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Disconnecting the Gauge Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Compressor Port Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Discharging the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Evacuating the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Charging the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Checking for Leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Checking Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

SERVICING THE SYSTEM COMPONENTS ............................................... 11 Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Receiver-Dehydrator .................................................... : . . . . . . . 11 Thermostatic Safety Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Expansion Valve ................................................................ 12 Evaporator Coil ................................................................. 13 Compressor .................................................................... 14

SERVICING THE NON-REFRIGERATION SYSTEM ........................................ 15 Compressor Drive Belt ........................................................... 15 Blower Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . 15 Temperature Control Switch ....................................................... 15 Motors ....................................................................... 15 Air Intake Filter ................................................................. 16 Tractor Engine .................................................................. 17

SERVICE DIAGNOSIS ............................................................... 18

-1-'- Air Conditioning