Carrier X4 7700 Operator's Manual page 48

SYSTEM
Air Intake
System
Starting
Circuit
Charging
Circuit
Unit
Refrigeration
System
Electrical
System
c. 5 Year or 12,000 Hour Maintenance
Coolant
System
d. Oil Change Intervals
Oil Type
Petroleum
Mobil Delvac 1
1 = Based on EPA 40 CFR Part 89
2 = Mobil Delvac 1 is the only approved synthetic oil
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.
62-12250
1. Change air cleaner element
2. Check and reset air cleaner indicator
1. Clean battery connections and cable ends
2. Check battery hold down clamps
3. Check battery condition
4. Check starter operation
1. Check alternator brushes, replace if needed
2. Check alternator output
1. Check unit mounting bolts
2. Check engine and compressor mounting bolts
3. Check door latches and hinges
4. Check all belt tensions, adjust as necessary
5. Check gearbox and fanshaft for oil leaks
6. Check fanshaft, idler and gearbox bearings
7. Check clutch air gap, adjust as required
1. Check compressor drive coupling
2. Check defrost air switch and calibrate as necessary
3. Remove bulkhead (if equipped). Check and clean the
evaporator coil and all defrost drain hoses
4. Install manifold gauge set and check refrigerant pressure
5. Run APX Control System Pretrip
6. Check manual defrost operation
1. Check unit switches and electrical connections
2. Check condition of all modules
1. Drain and flush cooling system.
2. Refill with Extended Life Coolant
3000 hours or 2 years (Maximum oil drain interval is 2 years)
2
4000 hours or 2 years (Maximum oil drain interval is 2 years)
OPERATION
Oil Change / ESI Filter Change
42