Broderson IC-20-1J, Operation And Maintenance Manual

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MECHANICAL ADJUSTMENTS
FASTENERS:
All fasteners in the IC-20 should be checked, and retightened if required, as a part of the
preventive maintenance program. Particular attention should be given to the axle, wheel
and hub mounting bolts, pump mounting bolts, rotation bearing bolts, and hoist bolts. All
bolts used in assembly are heat-treated Grade 5 except the bolts attaching the rotation
bearing to the mainframe and turret, which are Grade 8. The torque chart on the next
page can be used on all bolts.
WHEEL BEARING ADJUSTMENTS:
Wheel bearing adjustment must be maintained at all times. Adjustment is made each
time the bearings are repacked (annually). Wheel bearings are adjusted by the adjusting
nut. This nut should be tightened until only a slight drag is felt when rotating the wheel.
WHEEL ALIGNMENT:
Toe-in, which is the setting of the steering wheels so they are closer together at the front
than at the rear, is adjusted by lengthening or shortening the tie rods. Proper toe-in for
the rear wheels is zero.
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