METHOD FOR CHECKING IDLER OIL LEVEL
WARNING
When the oil level is low and new oil must be added, the machine body needs to be inclined, and that is
dangerous.
Ask your Komatsu distributor for adding.
Low oil level in the idler can cause noise and seizure. Stop the machine on a flat place and check for the oil
level according to the following procedure.
1.
Loosen plug (1) gradually and check that oil oozes out
through the thread portion.
•
When oil oozes out through thread portion
You do not need to add oil.
• When no oil oozes out through thread portion
The oil is insufficient. Ask your Komatsu distributor for
adding.
2.
After checking, tighten plug (1).
METHOD FOR CHECKING AND ADJUSTING IDLER CLEARANCE
Since the idlers are forced to move forward and backward by an external force, guide plates will be worn out.
W
ear of guide plates will cause the vibration of idlers from side to side or inclination of the idlers, and running off
of track links from the idlers or unevenly worn idler and links may result.
Check and adjust it as follows.
1.
Drive the machine by 1 to 2 m {3 ft 3 in to 6 ft 7 in} on a flat place.
2.
Measure clearance (A) between track frame (1) and guide
plate
(2) (4 places on the right and left, and inside and out-
side).
• When clearance (A) is less than 1.5 mm {0.059 in} .
The clearance of the idler does not need to be adjust-
ed.
• When clearance (A) is 1.5 mm {0.059 in}  or more
Adjust the clearance of the idler.
1)
Loosen bolt (3).
2)
Remove some shims and adjust the clearance on
each side to 0.2 to 1.2 mm {0.008 to 0.047 in} .
Thickness of 1 shim is 1 mm {0.04 in} .
MAINTENANCE MAINTENANCE PROCEDURE
4-27
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