BigDog Diablo MP Operator's Manual
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BigDog Diablo MP Operator's Manual

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BigDog
®
Mowers Diablo
®
MP
Operator Manual
200 South Ridge Road
Hesston, Kansas
67062
605231
REV B

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Big Daddy Papa C
June 6, 2025

How do you get the bolt out to change lawnmower blades on a big bog Diablo mp 60” deck. Do you turn the wrench left or right to loosen the bolt

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Summary of Contents for BigDog Diablo MP

  • Page 1 BigDog ® Mowers Diablo ® Operator Manual 200 South Ridge Road Hesston, Kansas 67062 605231 REV B...
  • Page 2 REV B 605231...

  • Page 3: Table Of Contents

    Table of Contents General Information ........1-1 To The New Owner .
  • Page 4 Fuel And Evaporative Emissions Control System ... . 4-3 Engine Oil and Filter ........4-5 Engine Air Filter .

  • Page 5: General Information

    1. Correct part description. 2. Correct part number. General operation, adjustment and maintenance guidance is 3. Correct model number. outlined for both the experienced and novice BigDog Mowers ® 4. Correct serial number. user. Operating conditions vary considerably and cannot all be All warranty repair and service must be handled through an addressed individually.
  • Page 6 WARNING The engine exhaust from this product contains chemicals known to the state of California to cause cancer, birth defects or other reproductive harm. NOTICE OF REQUIREMENT OF SPARK ARRESTER MUFFLER This equipment may create sparks that can start fires around dry vegetation. California Public Resources Code Section 4442.6 provides that it is unlawful to use or operate an internal combustion engine on any forest-covered, brush-covered, or grass-covered land unless the engine is equipped with a spark arrester maintained in effective working order.

  • Page 7: Safety Precautions

    SAFETY PRECAUTIONS • It is also the owner’s responsibility to make certain that the operators and mechanics are qualified and physically able individuals, properly trained in the operation of this equipment. • All operators and mechanics must become familiar with the safe operation of the equipment, operator controls and decals.
  • Page 8 WARNING: Thrown objects! • Always maintain a safe distance from people and pets when mowing. 601967 • Always stop machine if someone WARNING: Fire! • Clean flammable material from enters the area. • machine. Prevent fires by keeping Inspect area to be mowed for hazards engine compartment, top of deck, such as rocks, metal objects and other Part Number 601967...
  • Page 9 WARNING:Thrown objects! DANGER: Rotating blades, pulleys & belts • • Always maintain a safe distance from Keep shields and covers in people and pets when mowing. place while machine is in oper- • ation Always stop machine if someone enters 604222 •...
  • Page 10 DANGER: Battery Hazards! Part Number 601815 601815 • Do not overfill battery. • • Avoid skin contact Do not allow open flame near the bat- • Electrolyte may overflow and damage with battery acid tery when charging. paint, wiring or structure. When cleaning •...
  • Page 11 Part Number 603056 603056 Fast Slow Choke Mower blade engage/disengage switch Ignition switch - insert key Engine start position Before starting the engine: • Read Operator’s Manual • Disengage mower blades • Place control levers in park brake position Read Operator’s Manual before attempting to operate this machine. Wear ear protection, eye protection and safety shoes when operating this equipment.
  • Page 12 Part Number 601993 WARNING: Read Operator’s Manual and decals before attempting to operate this machine. WARNING: Roll over! • Mow a safe distance (minimum of 10 feet) away from drop-offs, retaining walls, drainage ditches, embankments, water, and other types of hazards to avoid a wheel dropping over the edge or to avoid the ground from breaking away.
  • Page 13 Slope Guide Use this diagram when determining the degree of slope to be mowed. E (15 Slope Guide Lines D (10 C (5 Line A 1. Hold this sheet of paper in front of you. Make sure that Line A is horizontal. 2.
  • Page 14 REV B 605231...

  • Page 15: Operation

    OPERATION  Do not operate the equipment while wearing sandals, ten- Safe Operating Practices nis shoes, sneakers, shorts or any type of loose fitting clothing. Do not use a towel as a headband or neck wrap This product is capable of amputating hands and feet and and do not hang a towel from the waist.

  • Page 16: Using A Ramp

     Do not exceed a 15 degree angle between the ramp and cause serious physical injury. the ground or between the ramp and the trailer or truck.  The BigDog mower is capable of operating horizontally ®  Avoid sudden acceleration when on a ramp.

  • Page 17: Children

    6. Extremely dry conditions of grass the presence of children. Children are often attracted to the 7. Tire pressure mower and the mowing activity. Never assume that children Any attachments mounted to the mower will also affect will remain where you last saw them. ...

  • Page 18: Control Panel

    Control Panel pressure is developed. If light comes on during operation, shut engine off immediately and locate and correct the problem. Controls A. Steering control levers (Figure 3-2 & Figure 3-3) — these levers control the mower’s speed, direction, stopping, and park brake. These levers are used to steer, accelerate, decelerate and change direction.

  • Page 19: Lights

    If the seat switch is not operating properly (is not opening or closing) and if the cause can not be determined, replace the seat switch. If the problem cannot be located, contact your BigDog ® Figure 3-4 Mowers Dealer.

  • Page 20: Stopping The Engine

    (park brake switches are disengaged) or the deck clutch switch is engaged the engine will stop. The following steps are the correct procedures for starting the engine. If difficulty is encountered, contact the BigDog ® Mowers Dealer in your area.
  • Page 21 WARNING Always pull from the mower hitch. Do not attach chains or ropes to the ROPS for pulling purposes, as the machine ROPS can tip backwards. Always fasten seat belt during operation of the machine (mower equipped with ROPS in “raised/up” position). Inspect the area prior to mowing for proper overhead clearance (tree limbs, guy wires, doorways, etc).

  • Page 22: Mower Operation

    1. Check the torque of the ROPS mounting bolts. Tighten Mower Operation the bolts to the correct torques as shown below if necessary. Figure 3-8 Driving the mower 2. Inspect the operator’s seat and the mounting parts for the seat belt. Tighten the bolts to the correct torque as shown DANGER below if necessary and replace parts that show wear or damage.
  • Page 23 steering control lever and finish the turn. (Figure 3-10) FRONT OF MOWER FACES THIS DIRECTION WARNING Always be aware of what is behind the machine before FORWARD TRAVEL backing up. Do not mow in reverse unless absolutely nec- essary. Always look down and behind before and while backing up.
  • Page 24 Step 1 If you lose steering control while operating the machine, place the steering control levers in the park brake position immediately. Inspect the machine and involve your BigDog ® Mower Dealer to resolve the problem before continuing to operate.
  • Page 25 4. If the mower blades continue to rotate with the deck To avoid this, move onto a previously cut area with the blades clutch switch down, discontinue operation immediately engaged. and contact your BigDog Mowers Dealer. ® 605231 3-11...

  • Page 26: Air Flow Baffles

    Clutch life will be maximized if these procedures are followed. 1. Engage the clutch only when the throttle is set at 60” Deck Shown approximately 2/3 throttle and there is no load on the blades. After clutch engagement, advance the engine throttle to full rpm.

  • Page 27: Anti-Scalp Wheels

    Anti-Scalp Wheels Anti-scalp wheel kits are standard on BigDog ® Mowers. These anti-scalp wheels are designed to minimize scalping Anti-scalp wheel when mowing on rough uneven terrain. After setting the cutting height, adjust the front anti-scalp Adjusting holes wheels so they extend below the deck but do not contact the ground.
  • Page 28 REV B 3-14 605231...

  • Page 29: Maintenance & Adjustments

     Clean flammable material from machine. Prevent wear gloves and use extra caution when servicing them. fires by keeping the engine compartment, top of the  Use only genuine BigDog Mowers replacement parts to ® deck, exhaust area, battery, fuel line, fuel tank and ensure that original standards are maintained.

  • Page 30: Torque Values

    Front wheels ..... 8-12 psi (55-83 KPa) or structure. When cleaning the battery, use soap and water. Be careful not to get soap and water into If you wish to use non-pneumatic tires on your BigDog ® the battery. Clean the battery terminals with a solu-...

  • Page 31: Hydraulic System

    Figure 4-3 The hydraulic system filter is located inside the hydraulic Master fuse housing reservoir on the underneath side of the tank. Use a BigDog ® Mowers approved filter element only. Figure 4-3 Hydraulic oil heat exchanger...
  • Page 32 purge valves, liquid/vapor separator and other associated components. Modifying or Tampering with the evaporative emissions control system or the fuel system is prohibited. Federal law and California State law prohibit the following acts or the causing thereof: 1. The removal or rendering inoperative by any person other than for purposes of maintenance, repair, replacement, of Hydraulic any device or element of design incorporated into any...

  • Page 33: Engine Oil And Filter

    • Never attempt to start the engine when there is a pose a fire hazard. Refer to the engine owner’s manual for fuel strong odor of gasoline fumes present. Locate and specification requirements. correct the cause. A fuel shut-off valve is located on each mower. Close the fuel valve to prevent fuel flow to the engine.

  • Page 34: Engine Air Filter

    IMPORTANT: All oil drips or spills must be cleaned off of the exhaust system before operating the machine. Safety filter Oil drain valve Figure 4-8 Figure 4-6 looking for any holes or tears in the paper. Also check Engine Air Filter gaskets for cuts or tears.

  • Page 35: General Engine Maintenance

    Detailed instructions and recommendations for break-in and Inspect the machine and involve your BigDog ® Mow- regular maintenance are specified in the Engine Owner’s ers Dealer to resolve the problem before continuing to Manual.

  • Page 36: Mower Blade Removal

    Use a 15/16” wrench to remove the 5/8” cap screw holding the blade to the spindle shaft from underneath. NOTE: A blade holding tool (part number 381442) is available from BigDog ® Do not sharpen to original pattern (below). It is Mowers.

  • Page 37: Steering Control Lever Adjustment

    comfortable operating position is attained. Figure 4-13 The steering control levers can also be adjusted up and down. Remove the cap screws and nuts and slide the upper control lever up or down and align the holes in it with the holes in the lower lever.

  • Page 38: Maintenance Schedule

    Maintenance Schedule Refer to Figure 4-15, Figure 4-16, & Figure 4-17 WEEKLY MONTHLY ANNUALLY SERVICE AT OR 40 OR 100 OR 500 INTERVALS INDICATED HOURS HOURS HOURS Verify safety start interlock system Prior to each use Visually inspect unit for loose hardware and/or damaged parts Prior to each use Visually inspect tires Prior to each use...

  • Page 39: Maintenance Locator Chart

    Maintenance Locator Chart Figure 4-15 1. Engine Oil Fill & Dipstick 2. Fuel Filter 3. Engine Air Cleaner 4. Engine Oil Drain Valve 5. Battery 6. Fuel Tanks 7. Hydraulic Oil Reservoir 8. Hydraulic Oil Filter 9. Front Wheel Bearing Zerks (2) 10.
  • Page 40 Maintenance Locator Chart 1. Engine Oil Fill & Dipstick 2. Fuel Filter 3. Engine Air Cleaner 4. Engine Oil Drain Valve 5. Battery 6. Fuel Tanks 7. Hydraulic Oil Reservoir 8. Hydraulic Oil Filter 9. Front Wheel Bearing Zerks (2) 10.

  • Page 41: Troubleshooting

    TROUBLESHOOTING The majority of operating problems that occur with a system can be traced to improper adjustments or delayed service. A consistently applied preventative maintenance program, as outlined in the Maintenance section of this manual, will prevent many problems. The following chart is designed to help you locate a problem by suggesting probable causes and the recommended solutions.
  • Page 42 SUGGESTED SYMPTOMS PROBABLE CAUSES REMEDIES The blade(s) are not sharp Sharpen the blades A cutting blade(s) is/are Install new cutting blade(s) bent The deck is not level Level the deck per the Deck leveling and height adjustment section of the parts manual Uneven cutting height An anti-scalp wheel is not...

  • Page 43: Storage

    STORAGE When storing the unit at the end of the mowing season, the film of oil over any exposed metal surfaces of the engine mower, engine, and battery should have the following items that are subject to corrosion. serviced before storage. 8.

  • Page 44: Product Literature

    PRODUCT LITERATURE If you would like to view or print a copy of the BigDog Mowers Diablo MP product manuals (Operator’s Manual, General ® ® Service Manual, or Parts Manual) go online to www.bigdogmowers.com. Contact your local BigDog Mowers dealer if you require another engine owner’s manual.
  • Page 45 INDEX PAGE PAGE Air flow baffles ............3-12 New season preparation ........6-1 Anti-scalp wheels ..........3-13 Operating suggestions ......... 3-10 Belts .................4-7 Parts and service ........... 1-1 Control Panel ............3-4 Possible damage to ROPS ........3-7 Controls ..............3-4 Preparation of battery for storage ......6-1 Deck clutch operation ...........3-11 Preparation of engine for storage ......

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