10 07
Ensure that the compressor draws clean
air
For the correct function and longevity of your air com-
pressor it is important that the air, which is drawn into
the compressor is clean. The compressor should not
be used in an area, where the air is contaminated
with dust or over-spray from spraying applications.
Component parts (Refer to Fig 1)
1. Motor and Pump Unit
2. Air Filter Cover
3. Fan (inside cover)
4. Air Receiver (tank)
5. Drain Valve
6. Air Receiver (tank) Pressure Gauge
7. Air Outlet Pressure Gauge
8. Air Outlets
9. Air Outlet Pressure Regulator
10. Pressure Switch (on/off)
11. Safety Valve
Securing the wheels to the frame
The wheels are secured to the lower frame on the
underside of the air receiver. To fi x the wheels to the
frame, put the fi xing bolt through each wheel and
then through the hole in the frame. Secure by means
of the washer and nut. The positioning of the wheel
can be seen in Fig 1.
The safety blow off valve
The compressor is equipped with a safety valve (see
fi g 1). If the pump were to continue operating passed
the maximum pressure, due to a defective pressure
switch, the safety valve would open and eject air from
the air receiver. If the safety valve discharges air,
please turn off the compressor and contact the help-
line. The safety valve is either located to the side of
the pressure switch as in Fig 1 or directly screwed
into the air receiver.
1
2
4
5
6
10
11
8
9
7
3
TROUBLESHOOTING GUIDE
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Symptom Possible Cause (s) Corrective Action
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Compressor will not run 1. No electrical power 1. Plugged in? Check fuse/breaker
2. Blown fuse or motor overload
3. Breaker open 2. Replace blown fuse
4. Thermal overload open 3. Reset, determine cause of problem
5. Pressure switch faulty / 4. Motor will restart when cool
broken 5. Replace
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Motor hums but cannot 1. Defective no-return valve 1. Replace or repair
run or runs slowly or unloaded 2. Check connections, eliminate
2. Poor contacts, line voltage low extension lead if used, check circuit
3. Shorted or open circuit motor with voltmeter
winding 3. Replace motor
DANGER! Do not disassemble non return
valve with air in tank; bleed tank fi rst
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Fuses blow/circuit breaker 1. Incorrect size fuse, circuit 1. Check for proper fuse, use time-delay
trips repeatedly overloaded fuse. Disconnect other electrical
CAUTION! Never use an 2. Defective no-return valve or appliances from circuit or operate
extension cord with this unloader compressor on its own branch circuit
product 2. Replace or repair
DANGER! Do not disassemble non return
valve with air in tank; bleed tank fi rst
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Thermal overload protector 1. Low voltage 1. Eliminate extension cord, check with
cuts out repeatedly 2. Clogged air fi lter voltmeter
3. Lack of proper ventilation/room 2. Clean fi lter (see Maintenance section)
temperature too high 3. Move compressor to well ventilated
4. No-return valve malfunction area
5. Compressor valves failed 4. Replace
5. Replace valve assembly
DANGER! Do not disassemble non return
valve with air in tank; bleed tank fi rst
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Knocks, rattles, excessive 1. Loose bolts, tank not level 1. Tighten bolts, move tank to level
vibration 2. Defective bearing on eccentric position
or motor shaft 2. Replace
3. Cylinder or piston ring is worn 3. Replace or repair as necessary
or scored
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Tank pressure drops when 1. Loose drain cock 1. Tighten
compressor shuts off 2. No-return valve leaking 2. Disassemble no-return valve
3. Loose connections at pressure assembly, clean or replace
switch or regulator 3. Clean all connections with soap
and water solution and tighten
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