Preventive Maintenance Schedule For Ac System - Komatsu 830E Shop Manual

Preventive Maintenance Schedule for AC System

Truck Serial Number___________________________
Site Unit Number______________________________
Date:____________Hour Meter:_________________
COMPONENT
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 sea for leakage
Check mounting bracket
(tighten bolts)
Check clutch alignment 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 con-
denser (should be hot to
touch)
Replace if system is opened
M09010 05/02
Maintenance Interval
(months)
3 6 12 Done
Air Conditioning System
for HFC 134a Refrigerant
Last Maintenance Check:_______________________
Name of Service Technician________________
NOTE: Compressor should be run at least 5 minutes
(40°F minimum ambient temperature) every month, in
order to circulate oil and lubricate components.
COMPONENT
4. Expansion Valve
Inspect capillary tube (if
used) (leakage, damage,
looseness)
5. Evaporator
Clean dirt, bugs, leaves, etc.
from fins (w/ compressed
air)
Check solder joints on inlet/
outlet tubes (leakage)
Inspect condensation 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 operation
Outlets in cab: 40°F to 50° F
Inspect all wiring connec-
tions
Operate all manual controls
through full functions
Maintenance Interval
(months)
3 6 12 Done
X
M9-35