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MAINTENANCE PROCEDURE
1.
Remove bolts (1).
2.
Remove guide plate (2) and shim (3).
Keep removed shim (3) in a safe place and be careful not
to lose it.
3.
Loosen plug (4) 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.
4.
After checking, tighten plug (4).
5.
Install guide plate (2) and shim (3).
6.
Install bolts (1).
REMARK
When installing guide plate (2), install the same number and thickness of shims as removed shims (3).
The optimum condition may be obtained, if the clearance of the idler is adjusted at the same time. For the ad-
justment method, see "METHOD FOR ADJUSTING IDLER CLEARANCE".
METHOD FOR ADJUSTING IDLER CLEARANCE
Since the idlers are forced to move forward and backward by an external force, guide plates will be worn out.
Wear 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.
Adjust as follows.
1.
Drive the machine by 1 to 2 m 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 4 mm .
The clearance of the idler does not need to be adjus-
ted.
•
When clearance (A) is 4 mm or more
Adjust the clearance of the idler.
1)
Loosen bolt (3).
2)
Remove some shims and adjust the clearance on
each side to 0.5 to 1 mm.
Thickness of 1 shim is 1 mm.
4-26
MAINTENANCE
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