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MAINTENANCE
MODEL 15XPC CE
SERVICING / CHANGING CHIPPER BEARING
(FOR REXNORD® 6000 SERIES)
STEPS TO REPLACE A CHIPPER BEARING
STEPS TO REMOVE A CHIPPER
BEARING
Visual
Indicator
Set
Screw
Locknut
Adapter
Sleeve
Proper installation is critical to bearing life.
Improper installation could cause premature or
immediate failure. Particular care must be taken not
to create a preload on the bearings while tightening
the locknut. Use of a good quality torque wrench
is also important to your safety as well as proper
bearing installation.
1. Clean the shaft so that it is free from burrs and
rust. Do not coat the chipper shaft or the bore
of the bearing adapter with a preservative,
lubricant, or other substance such as Loctite
®
.
2. If the adapter sleeve happens to get removed
from the bearing during installation, the locking
pin in the adapter sleeve must be aligned with the
keyway in the inner bore. See Figure 1.
3.
Offset the bearing on the shaft about 3.2 mm
(1/8”) from its intended position towards the base,
so when the bearing is tightened up on the shaft,
the bolt holes will line up.
4. Hand tighten the locknut to take out the
looseness, then use a hook type spanner wrench
to bring the locknut to a snug fit.
5. Mark the locknut and chipper drum shaft with
a grease pencil or a dark marker. Use a soft
steel drift pin and a hammer to drive the locknut
clockwise 1 to 1 1/4 turn. Make sure the adapter
sleeve does not turn on the shaft while tightening.
If the adapter sleeve is turning, it can be held by
placing a hook type spanner wrench in the split
area of the sleeve.
6. Loosen all the bearing bolts to release the preload
on the bearings if there is any. Keep the weight
of the drum head off the bearings while bolting
down. Bolt both bearings down and torque the
bolts to 298 Nm (220 ft.-lbs.).
7. If the drum head does not spin freely, there is a
preload on the bearings. The bearing will need
to be completely loosened and steps 3 through
8 need to be repeated.
8. Torque the set screws in the locknut to 18-20 Nm
(13-15 ft.-lbs) with a 5/32” hex type torque
wrench.
Before attempting any type of maintenance,
disengage clutch, wait for the drum to come to a
complete stop, turn off engine, remove the ignition
key, make sure the ignition key is in your possession,
install the drum lock pin, and disconnect the battery.
SAFETY INSTRUCTIONS
NOTICE
1. Back out the locknut set screws.
2. Loosen the locknut with an impact spanner
wrench or a soft drift pin in a counter-clockwise
direction until the bearing adapter assembly
becomes completely loose.
3. Remove the mounting bolts.
4.
The bearing should slide freely off the shaft.
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