OPERATION & MAINTENANCE MANUAL SWE155F
4.5.3.3 Checking and Fastening Track Bolts
If operating machine with bolts loosened, there is hazard
that the bolts will rupture. Therefore the loosened bolts
should be fastened.
Tightening Method
Track shoe
1) Tighten at torque 490 ± 49 N m (50 ± 5 kgf m, 360 ±
36 lbft), then check to make sure that nuts contact
with track link surfaces securely.
2) After checking, retighten 120° ± 10°.
Rubber block ( if mounted)
1) Tighten at torque: 549 ± 59 N m (56 ± 6 kgf m, 405 ±
43 lbft).
2) After tightening, check to ensure that nut and track
link contact surface contact against each other
securely. .
Tighten Sequence
Tighten bolts in the sequence given in right fig.
With bolts tightened, check bolts and track link mating
face to ensure they contact securely.
4.5.3.4 Checking Track Tension
Run engine at low idling, move the machine forward
a distance equals to the length of track on ground.
Then stop the machine.
As shown in right fig, choose a straight long rod;
place it on track over idler ① and carrier roller ②,
measure the max distance “A” between upper surface
of track and bottom surface of the rod.
Standard deflection “A” should be 20-28 mm
(0.8-1.1 in).
If the track tension is not at standard value, adjust it in
the following manner:
1) Pump in grease through grease fitting② with a
grease pump.(pump fitting② and plug screw ①
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