SANY SY95C, Operation And Maintenance Manual

Page: 123 / 166

MAINTENANCE
5-25 SY95C Excavator OMM
Heating and Air Conditioning System
NOTE: When the air conditioning will not be used for an extended period of time, it should be operated for 3 to 5 minutes
each month to lubricate compressor components and air conditioning system seals.
Check and Adjust the Air Conditioner
Compressor Belt Tension
Check the Air Conditioner Compressor Belt Tension
1. Prepare the machine for service. See “Maintenance
Safety” on page 2-5.
0002961
Figure 5-35
2. Using a tensioning gauge, press down on the belt
halfway between the drive belt pulley (3) and the
compressor belt pulley (2) 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).
Adjust the Air Conditioner Compressor Belt Tension
NOTICE!
Check the pulleys and V-belt for damage and
wear. Make sure that the V-belt does not rub
against the bottom groove of the pulleys.
A newly installed V-belt must be readjusted after
operating the machine for 1 hour.
0002958
Figure 5-36
1. Prepare the machine for service. See “Maintenance
Safety” on page 2-5.
2. Loosen the belt adjustment pulley locknut (1) and
turn the tension adjuster (2) to achieve the correct
belt tension.
3. Tighten the belt adjustment pulley locknut.
Item Description Service Interval
Refrigerant (R134a)
Check for leaks in lines, fittings, and
components.
Daily
Condenser Check if condenser fins are plugged. When required
Compressor Check the compressor function and for leaks. Every 4000 service hours
V-belt
Check tension.
Every 250 service hours
Check for damage, wear, and deterioration.
Blower speed adjustment
dial
Check fan motor and fan operation.
Daily
Check speed adjustment function.
Temperature adjustment dial Check for normal operation. Daily
Fasteners Check for missing or loose fasteners. Every 6 months
1
2
3
2
1