Checking Depth Control and Stabilizer Wheel Bolts and Bearings—Drawn

N50101
N50101-UN-08FEB99

Tighten Wheel Bolts—Depth Control

N78044
N78044-UN-27SEP07

Tighten Wheel Bolts—Stabilizer Wheel

A - Wheel Bolts, Depth Control

B - Nut and Cap Screw

C - Shoulder Nut

D - Wheel Bolts, Stabilizer Wheel

Check tightness of all wheel bolts (A) and wheel pivot bearings after first 50 hours of operation, then periodically thereafter.

Tighten wheel bolts to specification.

ItemMeasurementSpecification
(A) Wheel Bolt, Grade 5Torque176 N˙m (130 lb-ft)

Adjust Depth Control Wheel Bearing—Remove center hub cap and cotter pin. Raise wheel and turn it. Tighten nut until there is a slight drag on bearings, back off to first hole, and insert cotter pin. Replace hub cap.

Adjust Stabilizer Wheel Bearing—Remove nut and cap screw (B) and remove wheel between arms. Raise wheel and turn it. Tighten shoulder nut (C) until there is a VERY slight drag on bearings. Replace wheel assembly between arms and attach cap screw and nut. Tighten cap screw (B) and wheel bolts (D) to specification.

ItemMeasurementSpecification
(B) Stabilizer Wheel Arm Bolt, Grade 8Torque203 N˙m (150 lb-ft)

ItemMeasurementSpecification
(D) Stabilizer Wheel Bolt, Grade 5Torque95 N˙m (70 lb-ft)

OUO6084,000211D-19-20081006