Komatsu 930E-2 - Preventive Maintenance Schedule for A;C System

Preventive Maintenance Schedule for A/C System
Truck Serial Number: ____________________________
Site Unit Number: ______________________________
Date:______________Hour Meter:_________________
COMPONENT
Maintenance Interval
(months)
3 6 12 Done
1.
COMPRESSOR
Check noise level •
Check clutch pulley •
Check oil level •
Run system 5 min.
•
Check belt tension
(80 - 100 lbs; V-belt)
•
Inspect shaft seal
(leakage)
•
Check mounting
bracket (tighten bolts)
•
Check alignment of
clutch w/crankshaft
pulley (within 0.06 in.)
•
Perform manifold
gauge check
•
Verify clutch is
engaging
•
2. CONDENSER
Clean dirt, bugs,
leaves, etc. from coils
(w/compressed air)
•
Verify engine fan
clutch is engaging (if
installed)
•
Check inlet/outlet for
obstructions/damage
•
3. RECEIVER - DRIER
Check inlet line from
condenser (should be
hot to touch)
•
Replace if system is
opened
•
COMPONENT
Maintenance Interval
(months)
3 6 12 Done
4.
EXPANSION VALVE
Inspect capillary tube
(if used) (leakage/dam-
age/
looseness)
•
5. EVAPORATOR
Clean dirt, bugs,
leaves, etc. from fins
(w/compressed air)
•
Check solder joints on
inlet/outlet tubes (leak-
age)
•
Inspect condensate
drain
•
6. OTHER Components
Check discharge lines
(hot to touch)
•
Check suction lines
(cold to touch)
•
Inspect fittings/clamps
& hoses
•
Check thermostatic
switch for proper op-
eration
•
Outlets in cab: 40°F to
50°F temperature
(HMS trucks: 25°F to
35°F below ambient)
•
Inspect all wiring
connections
•
Operate all manual
controls through full
functions
•
NOTE: Compressor should be run at least 5 minutes
(40°F minimum ambient temperature) every month, in
order to circulate oil and lubricate components.
Last Maintenance Check:________________________
Name of Service per-
M09010 6/97 Air Conditioning System M9-27
for HFC 134a Refrigerant