TM 5-3810-307-24-1-2
Preventive Maintenance Schedule
PREVENTIVE MAINTENANCE SCHEDULE
FOR AIR CONDITIONING SYSTEMS
NOTE: Typical Maintenance Schedule: 3 months or 15,000 miles, 6 months or 30,000 miles, 12 Months or 60,000 miles
Installation Date: ___________________________________________ Mileage: ____________
Last Maintenance Check: ____________________________________ Mileage: ____________
Checked by _______________________________________________ Mileage: ____________
MAINTENANCE
MAINTENANCE
COMPONENT
COMPONENT
INTERVAL (months)
INTERVAL (months)
3*
6*
12*
DONE
3*
6*
12*
DONE
1. COMPRESSOR
4. EXPANSION VALVE
●
●
Check noise level
Inspect capillary tube
●
Check clutch pulley
(leakage/damage/looseness)
●
Check oil level
●
Run system 5 minutes
5. EVAPORATOR
●
Check belts for tension
●
Clean dirt/bugs/leaves from
(120 lb max.)
fins/tubes (w/ compressed air)
●
Inspect shaft seal (leakage)
●
Check solder joints on
●
Check mounting bracket
inlet/outlet tubes (leakage)
(tighten bolts)
●
Inspect condensate drain
●
Check alignment to clutch
(R-12 or oil leak)
w/ crankshaft pulley
●
Perform manifold gauge check
●
6. OTHER COMPONENTS
Verify clutch is engaging
●
Check discharge lines
(hot to touch)
2. CONDENSER
●
Check suction lines
●
Clean dirt/bugs/leaves from
(cold to touch)
coils (w/ compressed air)
●
Inspect fittings/clamps/hoses
●
Check inlet/outlet for
●
Check thermostatic switch
obstructions/damage
(proper operation)
●
Outlets in cab (temperature
3. RECEIVER/DRIER
check; 40 to 50 F)
●
●
Check inlet line from
Check fan clutch (proper
condenser (hot to touch)
operation)
●
●
Check sight glass
Insect all wiring
(streaks or cloudiness)
connections
●
●
Replace if system is opened
Operate manual controls
through full functions
The following require monthly maintenance:
*Compressor run system at least 5 minutes (40 degrees Fahrenheit minimum outside temp.) in order to circulate oil and lubricate components.
Maintenance notes: __________________________________________________________________
______________________________________________________________________________
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