Adjusting and Tightening—Heavy-Duty Dual Wheel Hubs

RXA0093173-UN-27MAR07

Heavy-Duty Hub-12 Bolt (120 mm Axle)

A - Cap Screws

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 bolt heavy-duty wheels and 12 bolt hubs. Numbers indicating proper torquing sequence are cast into wheel hub.

Carefully follow procedure. Failure to do so could lead to wheel hub damage.

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

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

2. Loosen (without removing) sleeve bolts (1—12) just enough to move wheel.

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

3. NOTE: Adjusting tool is not compatible with heavy-duty wheel hub.

   Move wheel to desired position.

4. Tighten bolts (1—12) in numerical order until bolts maintain torque of 405 N˙m (300 lb-ft). Make sure wheel is perpendicular to axle.

5. Tighten bolts (1—12) in numerical order until bolts maintain torque of 610 N˙m (450 lb-ft).

6. Using a star shaped pattern, torque all wheel to hub cap screws (A) as needed to maintain torque.

   Item	Measurement	Specification
   Cap Screws (A)	Initial Torque	405 N·m 300 lb-ft
   Cap Screws (A)	Final Torque	610 N·m 450 lb-ft

7. IMPORTANT: Repeat torquing pattern until ALL bolts maintain the proper torque. Failure to follow procedure could result in damage to equipment and may result in personal injury.

   Drive tractor a minimum of 100 meters (110 yd) and tighten bolts in numerical order until bolts maintain torque of 610 N˙m (450 lb-ft).

8. IMPORTANT: If tractor is operated with wheel sleeve loose for 4-5 hours, it is necessary to replace sleeves.

   Torque bolts after working 3 HOURS, 10 HOURS, and DAILY during the first week of operation.

   NOTE: Continue to check torque a minimum of weekly if used for normal scraper operations.