SEN02458-01 30 Testing and adjusting
24 PC138US, USLC-8
Checking and adjusting air
conditioner compressor belt
tension 1
k Stop the machine on a level ground and
lower the work equipment to the ground.
Checking
1. Open the engine hood, press the intermediate
point of the belt between the fan pulley and
compressor pulley with a finger, and test
deflection (a) of the belt.
q Belt pressing force: 60 N {6.1 kg}
Adjusting
a If the belt deflection is abnormal, adjust it
according to the following procedure.
1. Loosen bolts (1) and (2) and locknut (6).
2. Move compressor (3) and bracket (4) as a set
with adjustment bolt (5) to adjust the belt ten-
sion.
3. After positioning compressor (3), tighten bolts
(1) and (2) and locknut (6).
a Check each pulley for breakage, wear of
the V-groove, and contact of the V-belt
and V-groove.
a If the V-belt is so lengthened that the
adjustment allowance is eliminated or it
has a cut or a crack, replace it.
a If the belt is replaced, adjust their tension
again after operating the machine for 1
hour.
a After tightening the bolts, check the belt
tension again according the above proce-
dure.
4. After finishing test, return the removed parts.
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