Repairing or Replacing RO- TOR Bearings

Service and Maintenance

5.6REPAIRING OR REPLACING RO- TOR BEARINGS

1.Remove the two 3/8 inch 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 inch bolts).

3.Lift belt idler pulley off drive belt and remove belt from pulleys. Using the push bolts from the bushing, remove the bushing and pulley from the rotor shaft.

WARNING

The rotor assembly has a lock mechanism. When work- ing on the rotor assembly, use the lock mechanism at all times. To use, 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.

4.If a rotor bearing needs repair, it is best to remove the complete rotor assembly from chipper frame.

5.Using an overhead hoist or lifting device, remove the four 1/2 inch bolts on each rotor bearing and lift the rotor assembly completely out of the frame. The complete rotor assembly weighs 275 lbs.

6.Once the rotor assembly is out of the frame, both bear- ings can be removed by a puller and replaced on the shaft.

7.Use the overhead hoist or lifting device to return the complete rotor assembly to the chipper frame.

8.Install the four 1/2 inch bolts on each bearing to secure them to the frame. Tighten bolts to 75 ft. lbs.

9.Replace drive belt on pulleys and lower belt idler. Check alignment of pulleys and adjust engine if needed.

10.Check belt tension before start-up. Adjust the eyebolt that anchors the idler spring to adjust the belt tension. Tighten the eyebolt until the belt deflection at the center of the belt is 7/16" when a 20 lb. load is placed against the belt (See Fig. #8).

11.Close cover and replace bolts.

12.Replace belt guard and resume operation.

13.Depress foot clutch pedal, start engine, release foot clutch pedal to engage belt, and test unit. Readjust pulleys and belt tension if needed.

14.On hydraulic units remove hydraulic pump and belts prior to step 3 and replace prior to step 12.

5.7GREASEABLE BEARINGS AND PIVOTS

The models have five greaseable bearings and pivots that require grease every 50 hours:

1.Two bearings on the rotor shaft.

2.One greaseable bushing on the foot clutch pedal pivot.

3.One grease zerk on idler pivot.

4.One grease zerk on discharge chute.

5.8 OTHER SERVICE TIPS

1.Service engine according to the Honda engine manual. Change engine oil and filter as recommended in manual.

2.Every 10 hours of operation, all bolts and other fasten- ers should be checked for correct torque.

5.9 TRAILER SERVICE TIPS

1.Check wheel bolt torque every 10 hours of towing use.

2.Check air pressure in tires every 10 hours of towing. Inflate to pressure marked on sidewall of tire.

3.Check and repack wheel bearings with grease every 12 months.

4.When towing, use a 2 inch trailer ball, and always con- nect the safety chains. Make sure trailer hitch bolts are tight and secure.

6" & 8" Bear Cat Chipper Operator’s Manual

Page 13

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Hayter Mowers 74824 manual Repairing or Replacing RO- TOR Bearings, Greaseable Bearings and Pivots

Models: 72620 71620 74824