SUBSECTION 9E
CRAWLER COMPONENTS
GENERAL
This subsection covers the maintenance and repair of the
crawler components.
MAINTENANCE
Crawler component wear cannot be prevented completely,
but the rate at which parts wear can be decreased through
preventative maintenance as follows:
1. Check the propel drive components and the crawler rol-
lers and idler often and lubricate them in accordance with
the lubrication charts in Section Ill.
2. Keep crawler parts tight. Check the torque of the com-
ponents in Table 9E-1, and maintain the torque specifica-
tions
Table 9E-1. Crawler Component Torques
4. Using a hydraulic power unit, placed between the side
frame bracket and the bearing block, force the idler sprocket
forward to remove the slack from the track.
5. Place the shims behind the bearing block, in the slot
opening, to take up the space.
6. Repeat steps 4 and 5 on the inside.
NOTE
3. Maintain proper track adjustment (see Crawler Adjust-
ment in this subsection).
An even thickness of shims in the inside and outside
packs is required to maintain parallel alignment of the
4. Check the crawler components daily for leaks. Repair or
idler sprocket to the track.
replace parts as required.
7. Place the remainder of the shims in the slot in front of the
5. Clean mud and debris from the crawler components
bearing block to hold it firmly in place.
daily.
8. When the track has been properly adjusted, install the
CRAWLER TRACK TENSION ADJUSTMENT
keeper plates.
9. Eventually. after an extended period of operation,
crawler track wear will reach the point where all the shims
1. Propel the machine so that any sag will appear at the
are on the inside of the bearing block. When this occurs, re-
front of the track (the end where the adjustment is made).
move all shims, break the crawler track and remove one
2. Remove the capscrews holding the keeper plates to ex-
crawler shoe. Then, reconnect the track and adjust the de-
pose the shims.
sired track tension by rebuilding the shim pack to whatever
3. Remove the shims found in front of the bearing blocks.
arrangement is required.