Instruction Manual

Operating Instructions
7
Tank does not hold
pressure when
compressor is unloaded
Excessive belt wear
Excessive discharge air
temperature
Tank pressure builds up
slowly
Tank pressure
builds up quickly on
compressor
Compressor continues to
build up pressure after
unloading pressure is
reached
Engine stalls
Gasoline engine will not
start
ASME safety valve pops
open while compressor
is running
Air leak in system
1. Pulley out of alignment
2. Belts too tight
3. Belts too loose
4. Pulley or flywheel wobble
5. Damage in belt groove of
pulley or flywheel
1. Dirty cooling surfaces
2. Poor ventilation
3. Blown head gasket
4. Restricted air intake
5. Worn valves
1. Dirty air filter
2. Blown cylinder head gasket
3. Worn or broken intake or
discharge valves
4. Air leaks
5. Loose belts
6. Speed too slow
1. Water in tank
2. Speed too fast
1. Severe air leak in pilot unloader
valve
2. Restriction in unloader lines
Toggle lever on pilot unloader
valve in loaded position
Low engine oil. Some engines
equipped with low-oil shutdown
1. Wrong unloader valve setting
2. Defective ASME safety valve
Locate and repair leak
Never attempt to repair or modify
a tank!
1. Realign motor pulley with compressor flywheel
2. Adjust tension. See “Maintenance” section
3. Adjust tension. See “Maintenance” section
4. Check for worn crankshaft, keyway or pulley bore, resulting
from running with loose pulleys. Check for bent crankshaft
5. File smooth or replace
1. Clean cooling surfaces of cylinder, intercooler and discharge
tube
2. Improve ventilation or relocate compressor
3. Replace head gasket
4. Clean or replace air filter element
5. Replace valve plate assembly
1. Clean or replace filter element
2. Install new gasket
3. Install new valve plate assembly
4. Tighten joints
5. Tighten belts. See “Maintenance” section
6. Check speed. See “Performance” chart
1. Drain tank. (This should be done DAILY)
2. Check speed. See specifications in replacement parts list
1. Check all fittings and lines and replace those which leak
2. Remove cause of restriction
Flip toggle level up into the unload
position
Add oil to proper level
1. Adjust to lower pressure (175 maximum psi for two-stage
unit or 125 psi for single stage unit). (See Operation)
2. Replace valve
Symptom Possible Cause(s) Corrective Action
TROUBLESHOOTING CHART (CONTINUED)