YMM800004
Capacities and SpecificationsGP/GLP/GDP15-20AK [C812];
GP/GLP/GDP20-35RK/TK [B871]
Safety Precautions Maintenance and Repair When lifting parts or
assemblies, make sure all slings, chains, or cables are correctly
fastened, and that the load being lifted is balanced. Make sure the
crane, cables, and chains have the capacity to support the weight
of the load. Do not lift heavy parts by hand, use a lifting
mechanism. Wear safety glasses. Disconnect the battery ground cable
on internal combustion lift trucks. Always use correct blocks to
prevent the unit from rolling or falling. See HOW TO PUT THE LIFT
TRUCK ON BLOCKS in the Operating Manual or the Periodic Maintenance
section. Keep the unit clean and the working area clean and
orderly. Use the correct tools for the job. Keep the tools clean
and in good condition. Always use YALE APPROVED parts when making
repairs. Replacement parts must meet or exceed the specifications
of the original equipment manufacturer. Make sure all nuts, bolts,
snap rings, and other fastening devices are removed before using
force to remove parts. Always fasten a DO NOT OPERATE tag to the
controls of the unit when making repairs, or if the unit needs
repairs. Be sure to follow the WARNING and CAUTION notes in the
instructions. Gasoline, Liquid Petroleum Gas (LPG), and Diesel fuel
are flammable. Be sure to follow the necessary safety precautions
when handling these fuels and when working on these fuel systems.
Batteries generate flammable gas when they are being charged. Keep
fire and sparks away from the area. Make sure the area is well
ventilated. NOTE: The following symbols and words indicate safety
information in this manual:
WARNINGIndicates a condition that can cause immediate death or
injury!
CAUTIONIndicates a condition that can cause property damage!
1
Lift Truck Lifting CapacityModel GP/GLP/GDP15AK [C812]
GP/GLP/GDP18AK [C812] GP/GLP/GDP20AK [C812] GP/GLP/GDP20RK/TK
[B871] GP/GLP/GDP25RK/TK [B871] GP/GLP/GDP30TK [B871]
GP/GLP/GDP35TK [B871] NOTE: Load center at 500 mm. kg 1500 1750
2000 2500 3000 3500
Counterweight WeightsModel GP/GLP/GDP15AK [C812] GP/GLP/GDP18AK
[C812] GP/GLP/GDP20AK [C812] GP/GLP/GDP20RK/TK [B871]
GP/GLP/GDP25RK/TK [B871] GP/GLP/GDP30TK [B871] GP/GLP/GDP35TXS
[B871] kg 810 1015 1200 1190 1530 1920 2215
Tire SizesTruck GP/GLP/GDP15AK [C812] GP/GLP/GDP18-20AK [C812]
GP/GLP/GDP20-25RK/TK [B871] GP/GLP/GDP30-35TK [B871] Drive Tires
6.00 - 9 21 x 8 - 9 7.00 - 12 28 x 9 - 15 Steer Tires 5.00 - 8 18 x
7 - 8 6.00 - 9 6.50 - 10
2
CapacitiesItem Fuel Capacity Gas GP15-20AK [C812] Gas
GP20-35RK/TK [B871] LPG GLP15-35AK/RK/TK [C812, B871] Diesel
GLP15-20AK [C812] Diesel GDP20-35RK/TK [B871] Engine Oil (With Oil
Filter) Mazda FE 4.3 liter 20 to 30C SAE 10W-30 5 to 40C SAE 30 API
SD and above 20 to 30C SAE 10W-30 5 to 40C SAE 30 API SD and above
20 to 30C SAE 10W-30 5 to 40C SAE 30 API CD and above 52.0 liter 86
Octane Quantity Specifications
69.0 liter
86 Octane
15/20 kg
LPG-HD 5
52.0 liter
Diesel No. 2
69.0 liter
Diesel No. 2
Mazda F2 4.6 liter
Yanmar Diesel 8.8 liter
Cooling System Mazda FE and F2 Serpentine and Square Wave
CAUTIONFE/10.4 liter F2/10.2 liter Additives may damage the
cooling system. Before using additives, contact your local Yale
dealer. 5 0 % Wa t e r a n d 5 0 % Ethylene Glycol, BoronFree
Antifreeze
3
Yanmar Diesel
CAUTIONAdditives may damage the cooling system. Before using
additives, contact your local Yale dealer. 5 0 % Wa t e r a n d 5 0
% Ethylene Glycol, BoronFree Antifreeze
2.7L/7.5 liter 3.3L/7.3 liter
Hydraulic Tank Oil Capacity All Trucks
CAUTION22 - 42 liter Initial ll Additives may damage the
hydraulic system. Before using additives, contact your local Yale
dealer. ISO VG-46 Hydraulic Oil 15C and above
Transmission Power Shift Transmission Brake Fluid Differential
and Drive Axle Oil GP/GLP/GDP15-20AK [C812] Differential and Drive
Axle Oil GP/GLP/GDP20-35RK/TK [B871] 8.3 liter 0.2 liter 5.0 liter
Dexron II or III SAE J-1703, DOT 3 SAE 80W-90 or 85W-140
6.5 liter
SAE 80W-90 or 85W-140
4
Electrical SystemItem Battery Spark Plugs Spark Plug Gap
Ignition Timing: Gas LPG Diesel 6 BTDC (Orange timing mark) 6 BTDC
(Orange timing mark) N/A Mazda FE and F2 Alternator Output (14
Volts) Idle High Idle Yanmar Alternator Output (13.5 Volts) Cold
High Idle Hot High Idle D 45 amps @ 2400 rpm 36.5 amps @ 2400 rpm G
and LPG 18 amps @ 800 rpm 42 amps @ 2700 rpm N/A N/A 2.7L engine
preset @ 4 ATDC 3.3L engine preset @ 6 ATDC Mazda FE and F2
12-volt, negative ground ND W9EXR-U 0.81 mm (0.031.0.04 in.) Yanmar
12-volt, negative ground N/A N/A
Transmission and Final DriveModel Engine Torque Converter Stall
Ratio 3.26 Reverse Forward 3.26 Reverse Forward 4TNE98 3.12 Reverse
Forward F2 3.26 Reverse Forward F2 3.26 Reverse Forward 4TNE98 3.12
Reverse 1.255 2.381 17.502 1.255 2.944 21.640 1.255 2.381 5.857
17.502 1.255 2.333 17.149 1.255 2.333 17.149 Direction Of Travel
Forward 1.255 1.917 5.167 12.423 Transmission Drop Box Gear Gear
Ratio Ratio Final Reduction Ratio Overall Ratio *
1.5-2.0 [C812] 2.0-2.5 [B871] 2.0-2.5 [B871] 3.0 [B871] 3.5
[B871] 3.0-3.5 [B871]
FE 4TNE92 FE F2 4TNE92
* Does not include Converter Ratio
5
Transmission Oil PressuresAll Pressures at 2000 rpm and Oil at
50 to 65C Port 1 Transmission Pump 1.47 MPa (15.0 kg/cm2) Port 2
Clutch 0.88~1.2 Mpa (9.0~12.0 kg/cm2) Port 3 Torque Converter
0.29~0.69 Mpa (3.0~7.0 kg/cm2)
*Relief Pressure **Clutch pack pressure difference between the
forward and reverse packs cannot exceed manufacturing limit of 48
kPa or service limit of 70 kPa.
6
Hydraulic System Relief PressuresItem Oil Temperature Primary
Relief Valve Pressure (High Idle) GP/GLP/GDP15-30AK/RK/TK [C812,
B871] GP/GLP/GDP35TK [B871] Secondary Relief Valve Pressure (High
Idle)0 18.6 0.5 MPa 0 20.6 0.5 MPa
Specification 55 to 65C
15.7 +0.5 MPa 0
Steering SystemItem Oil Temperature Steering Relief Pressure at
800 rpms GP/GLP/GDP15-35AK/RK/TK [C812, B871] Steering Cylinder
Stroke GP/GLP/GDP15-35AK/RK/TK [C812, B871] Inside Steering Tire
Angle Number of Turns to Lock GP/GLP/GDP15-35AK/RK/TK [C812, B871]
Turning Radius (50 mm NO LOAD) Pneumatic Tire Trucks GP/GLP/GDP15AK
[B871] GP/GLP/GDP18AK [B871] GP/GLP/GDP20AK [B871]
GP/GLP/GDP20RK/TK [B871] GP/GLP/GDP25RK/TK [B871] GP/GLP/GDP30TK
[B871] GP/GLP/GDP35TK [B871] 1975 2010 2040 2150 2210 2305 2355
4.25~4.5 Outside 154.65 mm 84.5 7.9 +0.5 MPa 0 Quantity 55 to
65C
7
Stall Speeds (in RPM 100 rpm)Mazda FE Engine Gas / LPG Mazda F2
Engine Gas / LPG Yanmar 2.7L Engine Diesel New Engine 2005 *30 or
more hours. Yanmar 3.3L Engine Diesel New Engine 2085 *30 or more
hours. Broken-In Engine* 2185 Broken-In Engine* 2015 New Engine
1960 Broken-In Engine 2060 New Engine 1880 Broken-In Engine
1980
Mast SpeedsNOTE: Lift speed is measured in meters/sec at
governed engine RPM with full open valve and 65C oil
temperature.
Lowering speed is measured in meters/sec with full open valve
and 65C oil temperature. Plus or minus 10% acceptable lifting or
lowering.Table 1. Lift Truck Models GP/GLP/GDP 15-20AK [C812]
Model/ Engine Lowering M/Sec Mast No Load 2-Stage LFL 2-Stage FFL
3-Stage FFL 2-Stage LFL 2-Stage FFL 3-Stage FFL 0.54 0.485 0.510
0.54 0.485 0.510 Rated Load 0.515 0.465 0.485 0.515 0.465 0.485 No
Load 0.635 0.575 0.605 0.67 0.61 0.635 Lifting M/Sec GP/GLP/
GDP15AK 0.6 0.545 0.57 0.63 0.57 0.6 GP/GLP/ GDP18AK 0.6 0.545 0.57
0.62 0.565 0.59 GP/GLP/ GDP20AK 0.595 0.54 0.565 0.61 0.555
0.58
GP/GLP1520AK Mazda FE
GDP1520AK Yanmar 4TNE92
8
Table 2. Lift Truck Models GP/GLP/GDP20-35RK/TK [B871] Lowering
M/Sec Model/ Engine Mast No Load 0.54 0.52 0.52 0.54 0.52 0.52 0.54
0.480 0.510 0.54 Rated Load 0.515 0.495 0.495 0.515 0.495 0.495
0.515 0.46 0.485 0.515 Lifting M/Sec GP/GLP/ GP/GLP/ GP/GLP/
GP/GLP/ No Load GDP20RK/ GDP25RK/ GDP30TK GDP35TK TK TK 0.595 0.560
0.565 0.65 0.61 0.615 0.535 0.465 0.5 3.0t 0.590 3.5t 0.550 3.0t
0.555 3.5t 0.515 3.0t 0.515 3.5t 0.480 0.62 0.585 0.590 0.705 0.665
0.665 0.58 0.505 0.545 0.515 0.450 0.485 0.565 0.530 0.535 0.615
0.58 0.585 N/A N/A N/A N/A 0.55 0.52 0.520 0.61 0.575 0.580 N/A N/A
N/A N/A N/A N/A N/A N/A N/A N/A 0.505 0.440 0.475 0.505 N/A N/A N/A
N/A N/A N/A N/A N/A N/A 0.450
2-Stage LFL GP/GLP2025RK 2-Stage FFL Mazda FE 3-Stage FFL
2-Stage LFL GP/GLP2025TK 2-Stage FFL Mazda F2 3-Stage FFL 2-Stage
LFL GP/ GLP30TK 2-Stage FFL Mazda F2 2700 rpm 3-Stage FFL 2-Stage
LFL GP/GLP3035TK 2-Stage FFL Mazda F2 3000 rpm 3-Stage FFL
GDP2025RK Yanmar 2.7L GDP2025TK Yanmar 3.3L 2-Stage LFL 2-Stage FFL
3-Stage FFL 2-Stage LFL 2-Stage FFL 3-Stage FFL
0.480
0.46
N/A
N/A
0.440
0.390
0.510 0.54 0.52 0.52 0.54 0.52 0.52 0.54 0.48 0.51 0.54 0.48
0.51
0.485 0.515 0.495 0.495 0.515 0.495 0.495 0.515 0.46 0.485 0.515
0.46 0.485
N/A 0.595 0.56 0.565 0.685 0.645 0.645 N/A N/A N/A N/A N/A
N/A
N/A 0.59 0.555 0.555 0.680 0.640 0.64 N/A N/A N/A N/A N/A
N/A
0.475 N/A N/A N/A N/A N/A N/A 0.56 0.485 0.525 N/A N/A N/A
0.425 N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.495 0.430 0.465
2-Stage LFL GDP30TK Yanmar 2-Stage FFL 3.3L 3-Stage FFL 2-Stage
LFL GDP35TK Yanmar 2-Stage FFL 3.3L 3-Stage FFL
9
Tilt AnglesTruck should be on level ground and in unloaded
condition.Table 4. GP/GLP/GDP15-35 AK/RK/TK [C812, B871] Forward 10
6 6 6 Tolerance +1, 0.5 +1, 0.5 +1, 0.5 +1, 0.5 Back 6 10 6 12
Tolerance +0, 0.5 +0, 0.5 +0, 0.5 +0, 0.5
Front End Equipment - Mast CreepMast CreepMeasure with load at
2.5 m high and with the lift, tilt, and auxiliary control levers in
neutral position.NOTE: Mast should be 90 vertical prior to test.
Table 5. GP/GLP/GDP15-35AK/RK/TK [C812, B871] Hydraulic Oil
Temperature C 20 30 40 50 60 Maximum Vertical Creep at Carriage
mm/Min 2.2 3.3 6.3 10.0 14.6 in./Min 0.086 0.130 0.247 0.394 0.575
Maximum Tilt Creep Mast Angle /Min 0.10 0.15 0.29 0.47 0.68
Cylinder Stroke mm/Min 0.93 1.40 2.70 4.37 6.32 in./Min 0.037 0.06
0.11 0.17 0.25
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Engine SpecificationsTable 6. GP/GLP/GDP15-35AK/RK/TK [C812,
B871] Item No. of Cylinders Firing Order Bore and Stroke
Displacement Engine Timing Compression Ratio Gas LPG Compression
Pressure (Minimum Values) Gas 1131 kPa @ 270 rpm 1131 kPa @ 270 rpm
226 to 362 kPa @ 2400 rpm 1131 kPa @ 270 rpm 1131 kPa @ 270 rpm 226
to 362 kPa @ 2400 rpm 8.6:1 8.6:1 8.6:1 8.6:1 Mazda FE 4 1-3-4-2 86
mm 86 mm 1998 cc 6 BTDC Gas/LPG Mazda F2 4 1-3-4-2 86 mm 94 mm 2184
cc 6 BTDC Gas/LPG
LPG
Oil Pressure Valve Clearance Intake Exhaust Idle Speed - Gas
Idle Speed - LPG Governed Speed High Idle (No Load) Thermostat
Range START TO OPEN FULL OPEN Cooling System Pressure
0.15 mm (COLD) 0.35 mm (COLD) 72525 rpm 72525 rpm GP/GLP-AK
250025 rpm GP/GLP-RK 270025 rpm
0.15 mm (COLD) 0.35 mm (COLD) 72525 rpm 72525 rpm GP/GLP20-30TK
270025 rpm GP/GLP30-35TK 300025 rpm
821.5C 951.5C 103 kPa
821.5C 951.5C 103 kPa
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Item No. of Cylinders Firing Order Bore and Stroke Displacement
Compression Ratio Compression Pressure (Minimum Values)
Horsepower/rpm Oil Pressure @ 80C (176F) Valve Clearance Intake
Exhaust Idle Speed Governed Speed High Idle (No Load) Thermostat
Range START TO OPEN FULL OPEN Cooling System Pressure
Yanmar 2.7L Diesel (4TNE92-SNM) 4 1-3-4-2 92 mm 100 mm 2659 cc
21.5:1 2840 to 3040 kPa @ 250 rpm Limit: 2350 kPa @ 250 rpm 45.1 @
2450 rpm
Yanmar 3.3L Diesel (4TNE98-SNM) 4 1-3-4-2 98 mm 110 mm 3319 cc
21.5:1 2840 to 3040 kPa @ 250 rpm Limit: 2350 kPa @ 250 rpm 63.6 @
2400 rpm
No Less than 58.6 kPa @ 850 rpm No Less than 58.6 kPa @ 850
rpm
0.200.05 mm (COLD) 0.200.05 mm (COLD) 81025 rpm GDP-AK 245025
rpm GDP-RK 262525 rpm
0.200.05 mm (COLD) 0.200.05 mm (COLD) 79025 rpm
262525 rpm
69 to 73C Above 852.0C 103 kPa
69 to 73C Above 852.0C 103 kPa
12
