Sullair 175 Operators Manual And Parts Lists page 34

Section 5
MAINTENANCE
TROUBLESHOOTING (continued)
SYMPTOM
ENGINE OVERHEATING
28
PROBABLE CAUSE
Loose Or Broken Fan Belt
Dirty Radiator Core
Low Fluid Level
Faulty Water Pump
Plugged Radiator
Defective Engine Thermostat
REMEDY
Tighten or change belt.
Clean thoroughly.
Refill.
Change pump.
Clean and flush thoroughly.
Replace engine thermostat.