S E R V I C E A N D M A I N T E N A N C E
Repairing or Replacing Rotor Bearings
1.Remove two 3/8" retaining bolts holding access cover to main frame assembly. Tilt access cover over to allow rotor access.
2.Remove large belt guard (three 5/16" bolts).
3.Loosen bolts on hydraulic pump and remove hydraulic pump belt. Remove the bushing and pulley from the rotor shaft using the push bolts from the bushing.
4.Lift belt idler pulley off drive belt and remove belt from pulleys. Remove the bushing and pulley from the rotor shaft using the push bolts from the bushing.
WARNING: The rotor assembly has a lock mechanism. Use the lock mechanism at all times when working on the rotor assembly. Remove plastic bearing cover under the chipper chute. There is a hole in the rotor jack shaft and a matching hole in the bracket mounted to the rotor bearing front side. Install a punch through the rotor shaft and bracket to lock the rotor in place.
5.Remove four 1/2" bolts on each rotor bearing and remove punch used to lock the rotor.
6.Lift the rotor assembly completely out of the frame using an overhead hoist or lifting device. The complete rotor assembly weighs 275 lbs.
7.Remove 3/8" bolts and collar from front once the rotor assembly is out of the frame. Remove both bearings with a puller and place new bearings on rotor shaft. Replace collar.
8.Return the complete rotor assembly to the chipper frame with an overhead hoist or lifting device.
9.Slide rotor back until front collar is tight against the front bearing. Lock the front bearing and install four 1/2" bolts on each bearing to secure them to the frame. Tighten bolts to 75 ft. lbs. Check and adjust chipper anvil if needed. Lock rear bearing.
10.Slide rear collar on shaft against rear bearing. Slide bushing onto shaft with flange against collar and lock bushing to shaft. Attach large pulley to bushing. Replace drive belt on pulleys and lower belt idler. Check alignment of pulleys and adjust engine if needed.
11.Close cover and replace bolts.
12.Replace hydraulic pump bushing and pulley. Replace hydraulic pump belt. Readjust hydraulic pump belt tension by sliding the hydraulic pump in the mounting slots. Tighten bolts.
13.Replace belt guard and resume operation.
14.Start tractor engine and engage PTO drive clutch (see tractor owner's manual). Increase engine speed to rated PTO RPM Position. Test unit, readjust pulleys, and belt tension if needed.
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