Adjusting and Tightening Rear Wheels—Heavy-Duty Cast 10-Cap Screw Hubs

RXA0056944-UN-10OCT01

Heavy Duty Cast Drive Hub Shown

CAUTION: Avoid personal injury. Never run the engine with transmission in gear and rear wheels off the ground. MFWD wheels could pull rear wheels off support. Disengage MFWD and put transmission in NEUTRAL to rotate axle. Never operate tractor with a loose rim, wheel, or hub.

CAUTION: Avoid the possibility of personal injury. Failure to follow torquing sequence and procedure will result in damage to equipment and may result in personal injury. Wheel cap screws are critical and require repeated torquing.

1. Raise tractor on level ground with rack upward on the axle.

2. Loosen (without removing) sleeve cap screws (1—10) enough to move wheel.

3. IMPORTANT: Do not loosen or remove the two socket head cap screws. Doing so could result in wheel jamming or damage.

   Turn pinion gear (A) to move wheel to desired position.

4. Tighten sleeve cap screws (1—10) in numerical order to initial torque specifications. Make sure wheel is perpendicular to axle.

5. Tighten sleeve cap screws (1—10) in numerical order to final torque specifications.

6. Drive tractor a minimum of 100 meters (100 yd) and retighten cap screws in numerical order to final torque specifications.

   Item	Measurement	Specification
   Wheel Hub Sleeve Cap Screws
   Initial	Torque	400 N·m (300 lb-ft)
   Final	Torque	610 N·m (450 lb-ft)

7. Retighten cap screws after working 3 HOURS, 10 HOURS, and DAILY during first week of operation and every 250 hours.

   IMPORTANT: Some sleeve cap screws may loosen as sleeve is tightened. Repeat numerical torquing pattern until ALL sleeve cap screws maintain proper torque. Failure to follow procedure could result in damage to equipment and may result in personal injury.