PREVENTIVE MAINTENANCE
SECTION V
2. Remove the shims found in front of the bearing blocks.
1. Open the drain cock at the bottom of the filter case and
drain the contents of the filter case.
3. Using a hydraulic power unit, placed between the side
frame bracket and the bearing block, force the idler sprocket
2. Loosen the bolt at the top of the fuel filter. Then remove
forward to remove the slack from the track.
the dirty filter element, clean the filter case, and install a
4. Place the shims behind the bearing block, in the slot
new element.
opening, to take up the space.
3. Fill the filter case with clean fuel to aid in faster pick up of
fuel.
5. Repeat steps 4 and 5 on the inside
4. Install a new gasket in the filter head and assemble the
NOTE
case and element. Tighten the center bolt to 20 to 24 ft-lbs
An even thickness of shims in the inside and outside
with a torque wrench.
packs is required to maintain parallel alignment of the
idler sprocket to the track.
To replace the fuel filter (replaceable element), proceed as
follows (see Figure 5C-3):
6. Place the remainder of the shims in the slot in front of the
bearing block to hold it firmly in place.
1. Unscrew the filter and discard it.
7. When the track has been properly adjusted, install the
2. FiII a new filter replacement about two-thirds full with
keeper plates.
clean fuel oil. Coat the seal gasket lightly with clean fuel oil.
3. Install the new filter and tighten it to one-half of a turn
8. Eventually, after an extended period of operating,
crawler track wear will reach the point where all the shims
beyond gasket contact.
are on the inside of the bearing block. When this occurs, re-
4. Start the engine and check for leaks.
move all shims, break the crawler track and remove one
crawler shoe. Then, reconnect the track and obtain the de-
CHECK HOSES AND TUBING
sired track tension by rebuilding the shim pack to whatever
Carefully inspect all hoses and tubing on the entire ma-
thickness is required. See the shop manual for crawler track
chine for leaks and/or damage. Leaks that cannot be
removal.
stopped by tightening the fitting should be removed and re-
CHECK PROPEL PUMP TRANSMISSION
paired or replaced.
OIL LEVEL
CHECK CRAWLER TRACK TENSION
The propel pump transmission is located behind the engine
If the track is too tight a connection between two pads could
and below the radiator. The dipstick can be reached through
break. On the other hand, if a track is too loose it may ride off
of the drive idler during the travel operation. To prevent
the access door in the left rear corner of the machinery
these occurrences from happening, track tension should be
house (see Figure 5C-5).
adjusted on a monthly basis or more frequently if neces-
Keep the oil level at the full mark at all times. Remove the
sary.
breather and plug from the filler tube assembly and add oil
as required.
Adjust crawler track tension as follows (see Figure 5C-4):
1. Propel the machine so that any sag will appear at the
front of the track (the end where the adjustment is made).
Remove the capscrews holding the keeper plates to expose
the shims.
Figure 5C-4. Crawler Track Adjustment
Figure 5C-5. Propel Pump Transmission Dipstick
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