Install Front Wheels—Dual Wheels

1. CAUTION:

   
   H87751-UN-27MAR07

   A - Pilot Stud

   B - Spacer Ring

   C - Wheel Bolts (8 Used)

   Dual wheels are heavy (approximately 340 kg (750 lb.) without liquid ballast) and difficult to handle due to extreme offset of tire and rim. When handling wheels, off centered weight can suddenly shift making wheel handling awkward and the wheel difficult to control. To avoid personal injury, two service technicians are needed to control wheel handling.

   NOTE: If installing dual wheels, both inner and outer wheels are positioned, so bottom end of tire cleats are facing towards front and down. Tire MUST be installed as directed or machine will not be drivable.

   Pilot stud H138607 is strongly recommended to help guide wheels into position.

   Install pilot studs (A) in top and bottom holes of drive hub. Stud threads must bottom out in hole so inner end is flush with inside of hub.

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2. IMPORTANT: Wheel bolts MUST be clean and oil-free when installing and torquing. Torque values specified in the following procedures are for clean, dry, wheel bolts. Lubricating oil reduces friction and thread bite to overload bolts.

   Due to countersunk design of spacer ring, inner wheel bolts can be checked and torqued when outer wheel is removed.

   Inner wheel is installed over drive hub (rim dished in) positioning tire close to machine.

   Position inner wheel on studs with bottom end of tire cleats to front and down.

3. Attach wheel with spacer ring (B) and wheel bolts (C). Wheel bolt heads fit inside larger unthreaded holes.

4. Remove pilot studs and replace with wheel bolts.

5. 
   H48028-UN-28AUG96

   Torque Sequence

   Initial Wheel Bolt Torque: Torque wheel bolts to specification using criss/cross pattern to evenly pull wheel tight against hub.

   Item	Measurement	Specification
   Wheel Bolts	Torque	200 N˙m (150 lb-ft)

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6. IMPORTANT:

   
   H87752-UN-27MAR07

   A - 30 mm Socket

   B - 4-to-1 Torque Multiplier

   C - Torque or Ratchet Wrench

   Final wheel bolt torque is extremely high and cannot be reached using common hand tools and torque wrench. A Four-to-One Torque Multiplier is required to meet final wheel bolt torque specifications. To achieve high torque results, final torquing must be done with tires on ground and with multiplier handle against inside of rim.

   Final Bolt Torque: Position tools (A—C) on wheel and turn bolt heads 1/4 turn past initial torque (ratchet/torque wrench will make a full turn).

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7. Repeat steps on opposite of machine.

8. IMPORTANT:

   
   H87753-UN-27MAR07

   A - Pilot Studs

   B - Spacers

   C - Wheel Bolts

   D - Chain Slot

   Wheel bolts MUST be clean and oil-free when installing and torquing. Torque values specified in the following procedures are for clean, dry, wheel bolts. Lubricating oil reduces friction and thread bite to overload bolts.

   Due to countersunk design of spacer ring, inner wheel bolts can be checked and torqued when outer wheel is removed.

   NOTE: Outer wheels have a chain slot (D) in rims.

   Outer Wheel Installation: Install pilot studs (A) in top and bottom tapped holes of spacer ring. Stud threads must bottom out in hole.

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9. Position outer wheel on studs with bottom end of tire cleats to front and down.

10. Attach wheel with spacers (B) and wheel bolts (C).

11. Replace pilot studs with spacers and wheel bolts.

12. 
    H48028-UN-28AUG96

    Torque Sequence

    Initial Wheel Bolt Torque: Torque wheel bolts to specification using criss/cross pattern to evenly pull wheel tight against hub.

    Item	Measurement	Specification
    Wheel Bolts	Torque	200 N˙m (150 lb-ft)

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13. Repeat steps on opposite side of machine and lower to ground.

14. IMPORTANT:

    
    H87754-UN-27MAR07

    A - 30 mm Socket

    B - Extension

    C - 4-to-1 Torque Multiplier

    D - Extension

    E - Torque or Ratchet Wrench

    Final wheel bolt torque is extremely high and cannot be reached using common hand tools and torque wrench. A Four-to-One Torque Multiplier is required to meet final wheel bolt torque specifications. To achieve high torque results, final torquing must be done with tires on ground and with multiplier handle against inside of rim.

    Final Bolt Torque: Position tools (A—E) on wheel and turn bolt heads 1/4 turn past initial torque (ratchet/torque wrench will make a full turn).

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15. Check tire pressure and inflate as needed, (See Care and Service of Tires for tire inflation pressure).