
SEBU8213-04 131
Maintenance Section
Track Pins - Inspect
Grease is under high pressure.
Grease coming out of the relief valve under pres-
sure can penetrate the body causing injury or
death.
Do not watch the relief valve to see if grease is es-
caping. Watch the track or track adjustment cylin-
der t o s ee if the track is being loosened.
Loosen the relief valve only one turn.
1. Move the machine forward for a distance of two
times the length of the machine. Allow the machine
toastopwithouttheuseoftheservicebrakes.
Shut off the engine. Adjust the tracks while you
are in the machine's typical operating conditions.
If packing conditions prevail on the job, the tracks
should be adjusted with packing material.
Note: PerformSteps2through4onbothsidesof
the machine.
g01266564
Illu
stration 202
2. Remove the cover for the track adjusting
mech
anism.
g01360290
Illustration 203
3. By using a manua
l grease gun, add multipurpose
grease (MPGM) through track adjustment valve
(4) in order to tighten the track. To loosen the
track, rotate
relief valve (5) counterclockwise.
Then, open the track adjustment valve by one full
turn and allow the grease to escape. Then close
relief valve
(5).
4. Close the valve cover.
5. Repeat the procedure for the other track.
i02801631
Track Pin s
-Inspect
SMCS Code: 4175
Fingers can be burned from hot pins and bush-
ings.
The pins and bushings in a dry joint can become
very hot
. It is possible to burn the fingers if there
is more than brief contact with these components.
Use the
recommendations in order to extend the life
of the undercarriage. Use the recommendations in
order to avoid excessive downtime.
1. During the machine operation, listen for unusual
squeaking and for unusual squealing. This can
indic
ate a dry joint.
2. Check the machine for dry joints weekly. Check
for d
ry joints immediately after machine operation.
After machine operation, lightly touch the end of
each track pin or bushing. Touch the track pin
or th
e track bushing with the back of your hand.
Make a mark on any dry track pin joint that is very
hot to the touch.
Consult your Caterpillar dealer's Custom Track
Service expert if you detect dry joints or leaks. Your
Cat
erpillar dealer's Custom Track Service expert can
perform track inspection.
Alternative Inspection
Us
e an infrared thermometer or a thermal camera in
order to inspect the temperature of the track pins.