Komatsu D51EX-24, Operation & Maintenance Manual

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1) Loosen the bolts (3) (4 pieces).
Tightening torque: 245 to 309 Nm {25 to 31.5 kgm}
2) Remove some shims and adjust the clearance on
each side to 0.5 mm to 1 mm.
Thickness of 1 shim is 1 mm.
METHOD FOR ADJUSTING IDLER CLEARANCE VERTICALLY
1.
Measure the clearance (B) to know the adjustment amount, subtract 2 mm {0.08 in} from the value, and re-
cord it.
(Example) When clearance (B) is 5 mm, the adjustment amount becomes (5 - 2 =) 3 mm.
2.
Loosen the bolts (1) (4 pieces) 3 turns each.
Do not turn the bolt more than 3 turns.
REMARK
Use the bolt with specified length. Do not change the
length.
3.
Remove the bolts (2) (2 pieces) and remove the cover (3).
4.
Pull out the shims so that the adjustment amount specified
at step 1. is achieved.
5.
Put the removed shims (4) onto shim (5).
At this time, check that the total pieces of shim (4) and
shim (5) are the same as those before adjustment.
Thickness of 1 shim is 1 mm type only.
6.
Restore the cover (3) to the original position, and tighten
the bolts (2) (2 pieces).
7.
Tighten the bolts (1) (4 pieces).
Tightening torque: 245 to 309 Nm {25 to 31.5 kgm}
8.
Check the clearance (B).
When the clearance (B) is 2 mm, adjustment is completed.
METHOD FOR INVERTING AND REPLACING CUTTING EDGE AND END BIT
k k
WARNING
It is dangerous if the work equipment moves by mistake when the cutting edge and end bit are turned
180 deg. or replaced.
Set the work equipment in a stable condition, place the work equipment lock lever to LOCK position,
then stop the engine.
Turn the cutting edges and end bits 180 degrees or replace them before they are worn out to the blade end.
1.
Raise the blade to proper height, and place blocks under it to prevent it from lowering.
2.
Set the work equipment lock lever to LOCK position.
3.
Stop the engine.
4.
Judge the wear of the end bit and cutting edge by the following wear standards.
MAINTENANCE PROCEDURE MAINTENANCE
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