CAUTION: 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

Use of pilot stud H138607 is strongly recommended to help guide wheels in mounting position.

1. 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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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.

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

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

4. Remove pilot studs and replace with wheel bolts.

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Specification

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IMPORTANT: 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 the ground and with multiplier handle against inside of rim.

6. Final Bolt Torque: Position tools (A-C) as shown, with Torque Multiplier handle against hard surface.

7. Turn all BOLT HEADS an additional 1/4 turn, past initial torque. Due to 4-to-1 torque multiplier, torque wrench will make a full turn while bolt head makes a 1/4 turn.

8. Repeat steps on opposite of machine.

A-30 mm Socket (3/4 in. Drive)
B-4-to-1 Torque Multiplier
C-Torque or Ratchet Wrench

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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.

NOTE: Outer wheels have chain slot in rim.

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

10. Position outer wheels on studs with bottom end of tire cleats to front and down.

11. Attach wheel with eight spacers (B) and wheel bolts (C).

12. Replace pilot studs with final two spacers and wheel bolts.

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Specification

14. Repeat outer wheel installation steps on opposite side of machine.

15. Lower combine to ground.

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IMPORTANT: 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 the ground and with multiplier handle against inside of rim.

16. Final Bolt Torque: Position tools (A-E) as shown, with Torque Multiplier handle against inside of rim.

17. Turn all BOLT HEADS an additional 1/4 turn, past initial torque. Due to 4-to-1 torque multiplier, torque wrench will make a full turn while bolt head makes a 1/4 turn.

18. Check tire pressure and inflate as needed. (See CARE and SERVICE of TIRES for tire inflation pressure).

A-30 mm Socket (3/4 in. Drive)
B-3/4 x 16 In. Extension
C-4 to 1 Torque Multiplier
D-1/2 to 10 In. Extension
E-Torque or Ratchet Wrench

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