SERVICE PROCEDURE MAINTENANCE
4-26
WHEN LOOSENING TENSION
WARNING
It is extremely dangerous to release the grease by any method except the procedure given below. If the
track tension is not relieved by this procedure, please contact your Komatsu distributor.
1. Loosen lubricator(1) gradually to release the grease.
2. Turn lubricator(1) a maximum of one turn.
3. If the grease does not come out smoothly, move the
machine backwards and forwards a short distance.
4. Tighten lubricator(1).
5. To check that the correct tension has been achieved,
move the machine backwards and forwards.
6. Check the track tension again, and if the tension is not
correct, adjust it again.
CHECK AND TIGHTEN TRACK SHOE BOLTS
If the machine is used with track shoe bolts(1) loose, they will
break, so tighten any loose bolts immediately.
ORDER FOR TIGHTENING
Tighten the bolts in the order shown in the diagram on the right.
METHOD FOR TIGHTENING (SHOE BOLT)
1. First tighten to a tightening torque of 392 ± 39.2N•m(40 ± 4kgf•m, 290 ± 30lbft) then check that the nut and
shoe are in close contact with the link contact surface.
2. After checking, tighten a further 120 º ± 10º.
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