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These maintenance schedules are based on the use of approved oils and regular
pretrip inspections of the unit. Failure to follow the recommended maintenance
schedule may affect the life and reliability of the refrigeration unit.
Air Intake
System
1. Change air cleaner element
2. Check and reset air cleaner indicator
Starting
Circuit
1. Clean battery connections and cable ends
2. Check battery hold down clamps
3. Check battery condition
4. Check starter operation
*Based on EPA 40 CFR Part 89
Charging
Circuit
1. Check battery charger output voltage
2. Check battery charger amperage
Unit 1. Check unit mounting bolts
2. Check engine and compressor mounting bolts
3. Check door latches and hinges
4. Check condition of water pump belt
Refrigeration
System
1. Check defrost air switch and calibrate as necessary
2. Remove bulkhead (if equipped). Check and clean the
evaporator coil and all defrost drain hoses
3. Install manifold gauge set and check refrigerant pressure
4. Check calibration of suction pressure transducer
5. Run APX Control System Pretrip
6. Check manual defrost operation
Electrical
System
1. Check unit switches and electrical connections
2. Check all ground connections for corrosion and tightness
3. Check stand-by plug for signs of wear or damage
4. Check condenser fan amperage
5. Check evaporator fan amperage
6. Check compressor amperage
7. Check heater amperage
5 year or 12,000 Hour Maintenance
Coolant
System
1. Drain and flush cooling system
2. Refill with Extended Life Coolant
Oil Change Intervals
Oil Type Oil Change / ESI Filter Change
Petroleum 3000 hours or 2 years (Maximum oil drain interval is 2 years)
Mobil Delvac 1* 4000 hours or 2 years (Maximum oil drain interval is 2 years)
*Mobil Delvac 1 is the only approved synthetic oil
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