3-PT. PTO ROUGH CUT MOWER - Northern Tool + Equipment · PDF fileFigure 5 Figure 3 Figure 10 3-PT. PTO ROUGH CUT MOWER OWNER’S MANUAL 4 of 14 Step 2: Remove the wired-on PTO shaft,

Thank you very much for choosing a Nortrac product. For future reference, please complete the owner’s record below:Serial Number/Lot Date Code: _______________ Purchase Date: _______________Save the receipt, warranty and these instructions. It is important that you read the entire manual to become familiar with this product before you begin using it.

This 3-Pt. PTO Rough Cut Mower is designed for certain applications only. Northern Tool & Equipment is not responsible for issues arising from modification or improper use of this product such as an application for which it was not designed. We strongly recommend that this product not be modified and/or used for any application other than that for which it was designed.

Table of ContentsIntended Use ----------------------------------------------------------------------------------------------- 1Technical Specifications ---------------------------------------------------------------------------------- 1Important Safety Information ----------------------------------------------------------------------------- 1Assembly Instructions ------------------------------------------------------------------------------------ 4Before Each Use ------------------------------------------------------------------------------------------- 6Operating Instructions ------------------------------------------------------------------------------------ 8After Each Use --------------------------------------------------------------------------------------------- 9Maintenance ---------------------------------------------------------------------------------------------- 10Troubleshooting ------------------------------------------------------------------------------------------ 10Parts Diagram --------------------------------------------------------------------------------------------- 11Parts List -------------------------------------------------------------------------------------------------- 12Replacement Parts --------------------------------------------------------------------------------------- 13Limited Warranty ----------------------------------------------------------------------------------------- 13

Intended UseThe NorTrac3-Pt. PTO Rough Cut Mower is ideal for owners requiring an economical machine to handle their land maintenance requirements.This mower was built to take on the toughest terrain. The front or rear mount capability, combined with PTO’s full-floating hitch mechanism, gives you incredible mobility and allows the mower to follow the contour of the land even when cresting hills or crossing gullies.

Technical Specifications

Important Safety Information

WARNING:• Read and understand all instructions. Failure to follow all instructions may result in serious

injury or property damage.• The warnings, cautions, and instructions in this manual cannot cover all possible conditions or

situations that could occur. Exercise common sense and caution when using this mower. Always be aware of the environment and ensure that the mower is used in a safe and responsible manner.

3-PT. PTO ROUGH CUT MOWEROWNER’S MANUAL

3-PT. PTO ROUGH CUT MOWER OWNER’S MANUAL

WARNING:Read carefully and understand all ASSEMBLY AND OPERATIONINSTRUCTIONS before operating. Failure to follow the safety rules and other basic safety precautions may result in serious personal injury.

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Item # 51473, #51474, #51475

Specification Recommended tractor Cutting width Overall width Width in feetCutting height PTO Speed Blade Tip Speed Blades

#5147322-50 HP45"(1150 mm) 50"(1270 mm) 41-1/2" -10" 540 RPM 14,173 ft/min 18-3/4" x .475" x2pcs

#5147422-50 HP57"(1450 mm) 61"(1560 mm) 51-1/2" -10" 540 RPM 11,811 ft/min 24" x .475" x2pcs

#5147530-80 HP69"(1750 mm) 73"(1870 mm) 61-1/2" -10" 540 RPM 10,827 ft/min 30-1/2" x .475" x2pcs

3-PT. PTO ROUGH CUT MOWER OWNER’S MANUAL 3-PT. PTO ROUGH CUT MOWER OWNER’S MANUAL

• Do not allow persons to operate or assemble the mower until they have read this manual and have developed a thorough understanding of how it works.

• Do not modify this mowerin any way. Unauthorized modifications may impair the function and/or safety and could affect the life of the mower. There are specific applications for which the mower was designed.

• Use the right tool for the job. DO NOT attempt to force small equipment to do the work of larger industrial equipment. There are certain applications for which this mower was designed. You will be safer and the unit will doa better job at the capacity for which it was intended. DO NOT use this mowerfor a purpose for which it was not intended.

• Industrial or commercial applications must follow OSHA requirements.

WARNING:• This product may contain chemicals known to the State of California to cause cancer, birth

defects or other reproductive harm.• Some dust created by power sanding, sawing, grinding, drilling, and other construction

activities contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. Some examples of these chemicals are:- lead from lead-based paints,- crystalline silica from bricks and cement and other masonry products, and- arsenic and chromium from chemically-treated lumber.

Your risk from these exposures varies, depending on how often you do this type of work. To reduce your exposure to these chemicals: work in a well-ventilated area, and work with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles. •Handling power cords on corded products may expose you to lead, a chemical known to the

State of California to cause cancer and birth defects or other reproductive harm. Wash your hands after handling.

WARNING:WORK AREA SAFETY• Inspect the work area before each use. Keep work area clean, dry, free of clutter, and well lit.

Cluttered, wet, or dark work areas can result in injury. Using the mower in confined work areas may put you dangerously close to other cutting

• tools and rotating parts.• Do not use the mower where there is a risk of a fire or an explosion; e.g., in the presence of

flammable liquids, gases, or dust. The product can create sparks, which may ignite the flammable liquids, gases, or dust.

• Do not allow the mower to come into contact with an electrical source. The mower is not insulated and contact will cause electrical shock.

• Keep children and bystanders away from the work area while operating the mower. Do not allow children to handle the mower.

• Be aware of all power lines, electrical circuits, water pipes, and other mechanical hazards in your work area. Some of these hazards may be hidden from your view and may cause personal injuryand/or property damage if contacted.

WARNING:PERSONAL SAFETY• Stay alert, watch what you are doing, and use common sense when operating the mower. Do

not use the mower while you are tired or under the influence of drugs, alcohol, or medication. A moment of inattention while operating the mower may result in a serious personal injury.

• Dress properly. Do not wear loose clothing, dangling objects, or jewelry. Keep your hair, clothing, and gloves away from moving parts. Loose clothes, jewelry, or long hair can be caught in moving parts. Air vents on the mower often cover moving parts and should be avoided.

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• Wear the proper personal protective equipment when necessary. Use ANSIZ87.1 compliant safety goggles (not safety glasses) with side shields, or when needed, a face shield. Use a dust mask in dusty work conditions. Also use non-skid safety shoes, hardhat, gloves, dust collection systems, and hearing protection when appropriate. This applies to all persons in the work area.

• Do not overreach. Keep proper footing and balance at all times.• Ensure the power switch is off prior to plugging it in.• Remove the keys or wrenches before connecting the mower to an air supply, power supply, or

turning on the mower. A wrench or a key that is left attached to a rotating part of the mower may cause personal injury.

• Secure the work with clamps or a vise instead of your hand when practical. This safety precaution allows for proper mower operation using both hands.

WARNING:ELECTRICAL SAFETY• Grounded tools must be plugged into an outlet, properly installed, and grounded in

accordance with all codes and ordinances. Never remove the grounding prong or modify the plug in any way. Do not use any adapter plugs. Check with a qualified electrician if you are in doubt as to whether the outlet is properly grounded. If the mower should electrically malfunction or break down, grounding provides a low resistance path to carry electricity away from the user.

• Double insulated tools are equipped with a polarized plug (one blade is wider than the other). This plug will fit in a polarized outlet only one way. If the plug does not fit fully in the outlet, reverse the plug. If it still does not fit, contact a qualified electrician to install a polarized outlet. Do not change the plug in any way. Double insulation eliminates the need for the three-wire, grounded power cord and grounded power supply system.

• Do not allow the mower to come into contact with an electrical source. The mower is not insulated and contact will cause electrical shock.

• Avoid body contact with grounded surfaces such as pipes, radiators, ranges, and refrigerators. There is an increased risk of electric shock if your body is grounded.

• Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock.

• Do not abuse the power cord. Never use the power cord to carry the tools or pull the plug from an outlet. Keep the power cord away from heat, oil, sharp edges, or moving parts. Replace damaged power cords immediately. Damaged power cords increase the risk of electric shock.

• Use outdoor extension cords marked W-A or W, when operating a power tool outside. These extension cords are rated for outdoor use, and reduce the risk of electric shock.

CAUTION:MOWERUSE AND CARE• Do not force the mower. Productsare safer and do a better job when used in the manner for

which they are designed. Plan your work and use the correct product for the job.• Check for damaged parts before each use. Carefully check that the mowerwill operate

properly and perform its intended function. Replace damaged or worn parts immediately. Never operate the mowerwith a damaged part.

• Do not use a mower with a malfunctioning switch. Any power tool that cannot be controlled with the power switch is dangerous and must be repaired by an authorized service representative before using.

• Disconnect the power/air supply from the mower and place the switch in the locked or off position before making any adjustments, changing accessories, or storing the mower. Such preventive safety measures reduce the risk of starting the mower accidentally.

• Store the mowerwhen it is not in use. Store it in a dry, secure place out of the reach of children. Inspect the mower for good working condition prior to storage and before re-use.

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Figure 5

Figure 3Figure 10


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Step 2: Remove the wired-on PTO shaft, the lift pins, and the spacers. Loosen and remove the boltsfour (4) on the lift arm bracketsthat secure thelift arm support straps, the lift arms, and thelift arm braces (from the shipping positions) and set all pieces aside (Figure 2).

Step 3: Remove PTO shaft, lift pins, and spacersStep 4: Install the right lift arm and lift arm support strap using two (2) short bolts and one (1) lift pin(Figure 3). Note: The lift arm support strap has one hole punched larger than the other. The larger hole is to be used to fasten with the lift pin. The lift arm & support straps should be fastened to the outside of the lift arm bracket.

Figure 1

• Use only accessories that are recommended by the manufacturer for use with your mower. Accessories that may be suitable for one product may create a risk of injury when used with another tool.Never use an accessory that has a lower operating speed or operating pressure than the tool itself.

• Keep guards in place and in working order.Never operate the mower without the guards in place.

• Do not leave the mower running unattended.

Assembly Instructions

Step 1: Place the mower on a flat level surface(Figure 1).

Step 5: Loosen and remove the two (2) nuts and washers for the A-frame tailwheel section, leaving the bolts in place (Figure 4).

Figure 2

Figure 4


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Step 7: Install the long top mounting bolt by inserting it through the hole in the left side lift arm brace, the lower of the two (2) holes in the left side lift arm, the spacer, the lower of the two (2) holes in the top of the right side lift arm (which should not be attached to the lift arm bracket at this time), and finally through the right side lift arm brace. Install a washer and start the nut on the bolt, but do not tighten it at this time (Figures 6-8).Note: You may have to move the assembly around to start the nut and washer. If you are unable to get the nut and washer started, a ‘C’ clamp may be necessary to compress the assembly in order to start the nut & washer.

Step 6: Install both the right and left side lift arm braces by sliding them over the two (2) A-frame tailwheel bolts that were loosened in Step 4. Start the nuts on the bolts, but at this time DO NOT TIGHTEN THEM. Allow the lift arm braces to rotate forward and rest against the installed lift arm (Figure 5).

Step 8: Using the right side lift arm as a lever, pull to the outside of the lift arm bracket and insert the bolt through the lift arm and the lift arm bracket. (See Figure 9.) Install the washer and nut. Place the lift pin in the larger of the two (2) holes on the lift arm brace and loosely attach the lift arm. Finally, inset the bolt, nut, and washer to lower the section of lift arm support strap to lift the arm bracket (Figure 10).

Figure 6

Figure 7

Figure 8

Step 9: Tighten all nuts and bolts.

Figure 9


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Before Each Use

WARNING:• Before each use, perform the maintenance described in the maintenance section• Read, understand, and follow the information on safety, preparation, starting and stopping

safety, operational safety, operational safety and transport safety warning sections of this manual

• With the tractor running, lower the mower into working position.• With the tractor at idle RPM, engage the PTO, and slowly advance the throttle to pproximately

540 PTO RPM.

Note: Do not allow the tractor engine or the mower to bog down or stall. This causes unnecessary wear and tear on the mower and the tractor. If this continues to occur, reduce the ground speed and/or raise the cutting height of the mower.

NEVERATTEMPT TO CLEAN OUT A CLOGGED DISCHARGE CHUTE UNLESS THE MOWER BLADES HAVE COMPLETELY STOPPED AND THE TRACTOR HAS BEEN SHUT OFF.

Safety Decal LocationsGood safety requires that you familiarize yourself with thisunit’s safety decalwarnings. The positioning of the labels on the equipment is shown on the diagram on the following page. The numbered labels follow (1-8).


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78

1

2 4

6

5

87

3


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Operating Instructions

WARNING:DO NOT overfill the gearbox. This could cause damage to the oil seals and can cause permanent damage to the gearbox and which would not be covered under the warranty. Before Putting the Mower into ServiceThe mower shipped without oil in the gear box and without grease in the grease fitting. The unit needs to be serviced before using.• Fill the gearbox with oil using multi-purpose gear oil.• For all grease fittings, use a high-temperature, multi-purpose grease.

Lubricating InstructionsStep 1: Placethe mower so the deck is secure and level.Step 2: Remove the 1/2"pipe plug (located at the top of the gearbox) and the 1/8"pipe plug (located onthe lower 1/3 of the gearbox).Step 3: Fill the gearbox using multi-purpose gear oil through the top 1/2" fill hole until the gear oil is level with the lower 1/8" hole.

Step 4: Replace both the 1/2" pipe plug (located at the top of the gear box) and the 1/8" pipe plug (located on the lower 1/3 of the gear box) and clean off any excess oil.Step 5: Grease the following zerts:• Tail wheel fork (Figure 11).• Both U-joints on the PTO shaft (Figure 12).

Arrows Indicate Grease Points

Step 6: Inspect all guards to insure they are in good working order. If they are not, replace them before using the unit.Step 7: Check the bolts, the nuts, and the belt to insure each is tight and secure.

Figure 11 Figure 12


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Height AdjustmentTo prevent blades from striking the ground, your mower should be set to the highestposition that will give the desired grass height. By setting the mower, you willreduce the blade wear and stress on the mower. Mowing at regular intervals will yieldfar better results than periodical mowing, e.g., weekly and bi-weekly mowing.Step 1: Raise the mower off the ground with the tractor and SECURELY BLOCK IT INPOSITION.Step 2: Remove the pin from the top of the wheel fork assembly. Lower the wheel fork assembly fromthe tail wheel arm.Step 3: Arrange the spacers until the desired cutting height is achieved. Cutting heights rangefrom approximately 2.0-6.0 inches in height.Step 4: Reinstall the wheel fork assembly into the tail wheel arm and install the keeper pin.Step 5: Repeat the adjustment process on the remaining wheel fork assembly. NOTE: Makesure each wheel fork is adjusted to the same height for an even cut.Step 6: Check to ensure that the tail wheel does not come within the specified 1" of therear deck.

Mower OperationStep 1: Before each use, perform the steps described in the Maintenance section.Step 2: Read, understand, and follow the information on safety training, preparation,starting and stopping safety, operational safety, and the transport safety warning sectionsof this manual.Step 3: With the tractor running, lower the mower to the ground so that the deck surface ofthe mower is parallel tothe ground.Step 4: With the tractor at an idle RPM, engage the PTO and slowly advance the throttle to 540PTO RPM. NOTE: The mower is designed to run at 540 PTO RPM only.Step 5: Select a low gear for the tractor and begin to mow. The tractor ground speed is controlled by the gear selector only and not the engine speed. The tractor’s ground speedshould allow the mower to maintain 540 PTO RPM and thus maximum blade tipspeed.NOTE: Do not allow the tractor’s engine or mower to bog down or stall.This causes undue wear and tear on the mower and the tractor. If this continues tohappen, reduce the ground speed and raise the cutting height of the mower.Step 6: After each use, clean all debris from the top and bottom of the mower.Replace any missing or illegible safety decals. Inspect for any damaged or wornparts and replace before the next use. Store the mower in a dry environment.

After Each Use

WARNING:After each use, clean all debris from the top and bottom of the mower. Replace any missing or illegible safety decals. Inspect the unit for any damaged or worn parts and replace them before the next use. Store the mower in a dry environment.


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Parts Diagram


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MaintenanceMaintain the mower by adopting a program of conscientious repair and maintenance in accordance with the following recommended procedures. It is recommended that the general condition of any tool be examined before it is used. Keep your mower in good repair. Keep all cutting tools sharp and clean. Properly maintained cutting tools with sharp cutting edges are less likely to bind and are easier to control. Keep handles dry, clean, and free from oil and grease. Also refer to yourtractor’s manual for additional information about engine maintenance. The following chart is based on a normal operation schedule.1. Periodically check and maintain a proper gear oil level.2. Approximately every 8 hours, grease spindles (3), roller axle (1), wheel forks (4), wheel axles

(4), PTO shaft universal joints (2), and the PTO’s telescoping surface. NOTE: Use a high-temperature, multi-purpose grease.3. Before each use, check to make sure all safety features are installed and working properly.4. Keep the mower blades sharp and balanced at all times. When replacing the blades, replace

the blade bolts at the same time.5. Periodically check all nuts, bolts, and the belt to insure they are tight and secure.

TroubleshootingUse the table below to troubleshoot problems before contacting customer service or your local dealer. If the problem continues after troubleshooting, call your local dealer for assistance.

FailureMower leaves a streak of uncut or partially cut grass

Mower seems to require excessive power

Blade bolts come loose

Gearbox is noisy

Possible CauseMower is not level (side to side)

Blades are dull or bentCarrier’s RPM is too lowField conditions are so wet that the tractor tire is pushing grass into the mudGround speed is too fast

Blades lockBlades are riding up due to the blade bolt wear or loose boltsMower is advancing into the grass or brush too rapidlyMower is hitting groundWorn or dull bladesTractor is not large enoughBolts not tightenedBlade bolt threads are worn or damagedGears are not aligned properly in the gear boxWorn bearings

Corrective ActionUse the tractors hitch adjustmentto level the mower as neededSharpen or replace the bladesUse the correct PTO speedToo wet to mow. Stop operating and wait until it is dry

Reduce ground speed by shifting to a lower gear. Free bladesReplace blade boltsMow in only one direction

Reduce forward travel speed

Raise mower and reset tailwheelSharpen or replace bladesUse larger horsepower tractorTighten bolts to 350 ft/lbReplace blade bolt, lock washer, and nutRun in or change gears

Replace bearing

20-1

20-2


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Replacement Parts• For replacement parts and technical questions, please call Customer Service at

1-800-222-5381.• Not all product components are available for replacement. The illustrations provided are a

convenient reference to the location and position of parts in the assembly sequence. • When ordering parts, the following information will be required: item description, item model

number, item serial number/item lot date code, and the replacement part reference number.• The distributor reserves the rights to make design changes and or improvements to product

lines and manuals without notice.

Limited WarrantyNorthern Tool and Equipment Company, Inc. ("We'' or '"Us'') warrants to the original purchaser only ("You'' or “Your”) that the Ironton Air Tool product purchased will be free from material defects in both materials and workmanship, normal wear and tear excepted, for a period of one year from date of purchase. The foregoing warranty is valid only if the installation and use of the product is strictly in accordance with product instructions. There are no other warranties, express or implied, including the warranty of merchantability or fitness for a particular purpose. If the product does not comply with this limited warranty, Your sole and exclusive remedy is that We will, at our sole option and within a commercially reasonable time, either replace the product without charge to You or refund the purchase price (less shipping). This limited warranty is not transferable.

Limitations on the WarrantyThis limited warranty does not cover: (a) normal wear and tear; (b) accessories both consumable and durable; (c) damage through abuse, neglect, misuse, or as a result of any accident or in any other manner; (d) damage from misapplication, overloading, or improper installation; (e) improper maintenance and repair; and (f) product alteration in any manner by anyone other than Us, with the sole exception of alterations made pursuant to product instructions and in a workmanlike manner.

Obligations of Purchaser You must retain Your product purchase receipt to verify date of purchase and that You are the original purchaser. To make a warranty claim, contact Us at 1-800-222-5381, identify the product by make and model number, and follow the claim instructions that will be provided. The product and the purchase receipt must be provided to Us in order to process Your warranty claim. Any returned product that is replaced or refunded by Us becomes our property. You will be responsible for return shipping costs or costs related to Your return visit to a retail store.

Remedy LimitsProduct replacement or a refund of the purchase price is Your sole remedy under this limited warranty or any other warranty related to the product. We shall not be liable for: service or labor charges or damage to Your property incurred in removing or replacing the product; any damages, including, without limitation, damages to tangible personal property or personal injury, related to Your improper use, installation, or maintenance of the product; or any indirect, incidental or consequential damages of any kind for any reason.


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Parts List

Part No. Description Specification Q'ty Part No. Description Specification Q'ty

1 Cotter Pin 5x50 1 4:4-29QDSP 12 Hex Head Bolt M16x45 10 5:4-37QDSP 13 Flat Washer 16 14 6:4-42QDSP 14 Lock Washer 16 14 29 Hair Pin 25 Hex Nut M16 14 30 Pin 16 Hex Head Bolt M16x70 2 31 Draw Pin ø22 27 Bolt M16x130 1 32 Lock Washer 22 28 Hex Nut M24 1 33 Nut M22 29 Hex Head Bolt M24x180 1 4' 2

10 Hex Head Bolt M14x130 1 5' 211 Steel Sleeve ø22.5 xø16.5 1 6' 212 U Bracket 1 35 Steel Sleeve ø32xø16.5 113 Hitch Bracket 1 36 Carriage Bolt M12x30 414 Hex Nut M27x1.5 2 37 Link Plate 115 Flat Washer 27 2 38 Flat Washer 12 416 Castle Nut M24 1 39 Lock Nut M12 417 Tail Wheel ø390x95 1 4' 4':17

4' 1 5' 5':245' 1 6' 6':296' 1 4' 14' 1 5' 15' 1 6' 16' 1 42 Bolt M6x25 24' 1 4' 15' 1 5' 16' 1 6' 14' 1 44 Lock Nut M6 25' 1 45 Flat Plate 16' 1 46 Lock Pin 14' 1 47 Bolt M10x35 25' 1 48 Flat Washer 10 26' 1 49 Lock Washer 10 2

22 Blade Holder For 45HP 1 50 Nut M10 24' 1 51 Bolt Cap 15' 1 52 Bolt M12x85 16' 1 53 Lock Nut M12 14' 25' 26' 2

25 Bolt M27x1.5 226 Wheel Yoke 1

4' 25' 26' 2

Cutting Blade

19

18

20-1

21

23

24

27

Chain

Ajusting Bar

20-2

43 Chain Rod

41 Chain Plate

34

40

Support Bar

28 PTO with Shear Pin

Side Bar

Gearbox 45HP

Main Deck

Wheel AssemblyA-frame

Lift Arm Brace Right

Lift Arm Brace Left


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Assumption of RiskYou acknowledge and agree that any use of the product for any purpose other than the specified use(s) stated in the product instructions is at Your own risk.

Governing LawThis limited warranty gives You specific legal rights, and You also may have other rights which vary from state to state. Some states do not allow limitations or exclusions on implied warranties or incidental or consequential damages, so the above limitations may not apply to You. This limited warranty is governed by the laws of the State of Minnesota, without regard to rules pertaining to conflicts of law. The state courts located in Dakota County, Minnesota shall have exclusive jurisdiction for any disputes relating to this warranty.

Distributed byNorthern Tool and Equipment Company, Inc.

Burnsville, Minnesota 55306NorthernTool.com

Made in China

Documents

3-PT. PTO ROUGH CUT MOWER - Northern Tool + Equipment · PDF fileFigure 5 Figure 3 Figure 10 3-PT. PTO ROUGH CUT MOWER OWNER’S MANUAL 4 of 14 Step 2: Remove the wired-on PTO shaft,