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Maintenance Procedures
SY75C Excavator OMM
5-18
Operation and Maintenance Manual — 0220
SANY
Air Conditioner
Compressor Belt - Check and Adjust
Air Conditioner Compressor Belt - Check
1. Open engine cover (a).
NOTE:
The air conditioner compressor is located on the
lower left of the engine compartment near the
radiator.
2. Remove bolts (b) securing the shroud around the
compressor and drive belt.
3. Examine the belt for signs of damage.
4. Using a tensioning gauge, press down on the belt halfway
between the drive belt pulley and the compressor belt
pulley with a force of 143 lbf. (637 N) for a new belt and
a force of 99 lbf. (441 N) for a used belt. The belt must
deflect (1) 0.20 in.– 0.31 in. (5 mm–8 mm).
5. Adjust belt tension if necessary.
6. Replace the shroud and secure in place.
Air Conditioner Compressor Belt - Adjust
1. Remove the shroud
2. Loosen adjustment screw (a) and adjust the compressor
belt until the desired belt tension is reached.
3. Tighten adjustment screw (a).
4. Check each pulley (b) for breaks, cracks and wear.
Replace the belt if:
•
It has stretched and there is little margin left for
adjustment.
•
Cuts or cracks are found in the belt.
CAUTION!
Ensure that the engine is off and that all rotating
parts inside the engine compartment have
stopped moving. Failure to do so could result in
minor or moderate injury.
Fig. 5-4
a
Fig. 5-5
b
Fig. 5-6
a
b
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