5-24
MAINTENANCE
SY60C Excavator OMM
Climate Control 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.
Service Intervals
Check and Adjust the Air Conditioner
Compressor Belt Tension
Two Methods of Checking Belt Tension
Prepare the machine for service. See “Maintenance
Safety” on page 2-5.
• Use a tensioning gauge to check the tension of the
compressor belt. A new belt should be tightened to
143 lb. (637 N), and a used belt should be tightened to
99 lb. (441 N).
0002961
Figure 5-29
• Press down on the belt halfway between the drive belt
pulley (3) and the compressor belt pulley (2). 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 5-30
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
