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FIELD REMOVAL AND REPLACEMENT OF THE ROTATION GEARBOX
WITHOUT REPLACING ROTATION BEARING
Be sure that the boom is well supported from rotation before removing the rotation
gearbox. IF NOT SUPPORTED, THE BOOM WILL SWING UNCONTROLLABLY
WITHOUT THE GEARBOX IN PLACE. Always replace the same number of shims under
the gearbox flange that came from the factory. If the bearing has been replaced since the
machine was built, the proper number of shims should have been installed at that time.
Check the bearing and pinion tooth surface match to assure that contact is even along the
full length of the teeth. If contact is not even, add additional shims as required. Use the
shims listed with the turntable installation parts in the Parts Manual.
WHEEL ALIGNMENT
Toe-in, which is the setting of the front wheels so they are closer together at the front than
at the rear, is adjusted by lengthening or shortening the tie rod. Proper toe-in for the front
wheels is 1/16" to 1/8" (1.6 mm to 3.2 mm) measured at the tire outer diameter. The rear
wheels should be set at zero toe-in.
Courtesy of Crane.Market
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