Adjusting and Tightening Rear Wheels—Heavy-Duty 12-Cap Screw Hubs

RXA0090157-UN-08AUG06

12 Cap Screw Heavy-Duty Drive Wheel

CAUTION: Avoid personal injury. Never run the engine with transmission in gear when adjusting wheels. Wheels on the ground could pull supported wheels off jackstands.

Never operate tractor with a loose rim, wheel, or hub.

IMPORTANT: Tractors are equipped with 12 cap screw heavy-duty drive wheels and hubs. Numbers indicating proper torquing sequences are cast into wheel hub.

Carefully follow procedure. Failure to do so could lead to sleeve or cast wheel damage.

IMPORTANT: Clean any paint, grease, film, rust or debris from axle shafts, cap screws, and threads before positioning and installing wheel sleeves and cast wheel. DO NOT apply any lubricant to cap screws, threads, wheel, or axle.

1. Raise tractor on level ground and support tractor with jackstands.

2. Loosen (without removing) sleeve cap screws (1—12) enough to move wheel.

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

3. CAUTION: Use a hoist, wheel dolly, or proper lifting equipment to safely slide and adjust wheels on axles and avoid possibility of personal injury.

   Failure to follow torquing sequence and procedure will result in damage to wheel sleeves and may result in personal injury. Wheel bolt torques are critical and require repeated tightening.

   Move wheel to desired position.

4. Tighten cap screws (1—12) in numerical torque sequence until bolts maintain initial torque. Make sure wheel is perpendicular to axle.

   Item	Measurement	Specification
   Wheel Cap Screws	Initial Torque	405 N·m 300 lb-ft

5. Tighten cap screws (1—12) in numerical order until bolts maintain final torque.

   Item	Measurement	Specification
   Wheel Cap Screws	Final Torque	610 N·m 450 lb-ft

6. IMPORTANT: Some sleeve cap screws may loosen as sleeve is tightened. Repeat star shaped numbered sequence 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.

   Drive tractor unloaded in a large figure-8 pattern a minimum of four times and tighten cap screws in numerical order until cap screws maintain final torque of 610 N·m (450 lb-ft).

7. IMPORTANT: Keep wheel sleeve cap screws tightened to specification. If tractor is operated with loose wheel sleeves or under-torqued cap screws it may be necessary to replace sleeves and cast wheels.

   Torque cap screws after working 3 HOURS, 10 HOURS, and DAILY during first week of operation or until cap screws do not move when retorquing.