Brush Bandit 1290XP, Operating & Parts Manual

Page: 71 / 140

Bandit
Copyright 12/07 PAGE 9
MODELS 1290XP/1590 MAINTENANCE SECTION
SERVICING / CHANGING FEEDWHEEL BEARING
(WITH THE GRIP TIGHT BEARING BEHIND FEEDWHEEL MOTOR)
Your Bandit Chipper maybe equipped with a tapered lock style (Grip Tight) feedwheel bearing on the
hydraulic motor side of the feedwheel and a conventional (set screw) style on the opposite side. With the Grip
Tight bearing this gives a very positive locking system to the feedwheel shaft. The set screws on both bearings
should still be checked as part of normal maintenance.
A few simple rules and installation instructions must be followed if the bearings ever need to be replaced
or removed during service.
The machine is set up with one set screw bearing and one Grip Tight bearing because the one Grip
Tight bearing is all that is needed to securely hold the feedwheel shaft (along with the set screws on the opposite
bearing). This also makes for very easy assembly.
When installing the bearing it is very important to install
and lock the Grip Tight bearing first with the set screw bearing done after. This is to keep the bearings
from being put into a side load which will lead to premature failure.
Installation procedure:
1) Clean the feedwheel shaft of all debris, use a degreaser.
2) Install both feedwheel bearings on the feedwheel shaft with the Grip Tight bearing on the hydraulic
motor side and the set screw bearing on the opposite side. Do not lock the bearings on the shaft
at this time, allow the feedwheel to shift freely for installation.
3) Position the feedwheel in the yoke mount and install all (8) feedwheel bearing bolts with a thread locking
compound applied. These are completely tightened and torqued at this time (refer to bolt torque chart).
4) The feedwheel then needs to be centered in the yoke and then it must be off set 3/16” (4.8 mm)
towards the set screw bearing side (away from the hydraulic motor). The weight of the feedwheel
needs to be taken off the bearings also.
5) First the Grip Tight bearing lock nut must be tightened by hand as tight as possible (in a clock wise
direction). This is the zero reference point. Scribe a line on the lock nut above the adapter slot.
6) Using a spanner wrench or drift pin and hammer, lock the bearing to the shaft by tightening the
lock nut in a clock wise direction. Tighten 3/4 to 1 full turn (you may need to block the feedwheel from
turning at this time). Now you can tighten the set screws on the Grip Tight bearing. Note: the set
screw is only to be tightened to 2 in.-lbs. (2 ft.-lbs.) (2.7 Nm).
7) Apply a thread locking compound on the set screws of the set screw bearing and torque to
20 ft.-lbs (27 Nm).
Grip Tight Bearing
Set Screw Bearing