Troubleshooting Guide - Campbell Hausfeld HL4330 Manual De Instrucciones

TROUBLESHOOTING GUIDE

Symptom
The discharge pressure is
low.
The air compressor unit is
making excessive noise (a
knocking sound).
There is a large quantity of oil
in the discharge air.
NOTE: In an oil lubricated
compressor there will always
be a small amount of oil in
the air stream.
There is water in the
discharge air / tank.
The pressure switch does
not release air when the unit
shuts off.
The pressure switch
continuously blows air out the
unloader valve.
Possible Cause(s)
1. The air demand exceeds
the pump capacity.
2. The air intake is restricted.
3. There are air leaks in
the fi ttings, tubing on the
compressor, or the plumbing
outside the unit.
4. There are blown gaskets.
5. There are leaking or
damaged valves.
1. The fasteners on the pump/
motor assembly or the
motor are loose.
2. There is no oil in the
crankcase.
3. The connecting rod is worn.
4. The piston pin bores are
worn.
5. The piston is hitting the
valve plate
6. There is a noisy check
valve in the compressor
system.
1. The piston rings are worn.
2. The compressor's air intake
is restricted.
3. There is excessive oil in the
compressor.
4. The oil viscosity is wrong.
1. This is normal during
operation. The amount of
water increases with humid
weather.
1. The unloader valve on
the pressure switch is
malfunctioning.
1. The check valve is
malfunctioning.
14
Corrective Action
1. Reduce the air demand or use a compressor with
more capacity.
2. Clean or replace the air fi lter element.
3. Listen for escaping air. Apply soap solution to all
fi ttings and connections. Bubbles will appear at points
of leakage. Tighten or replace leaking fi ttings or
connections. Use pipe thread sealant.
4. Replace any gaskets proven faulty on inspection.
5. Remove the head and inspect for valve breakage,
misaligned valves, damaged valve seats, etc. Replace
defective parts and reassemble. Install a new head
gasket each time the head is removed.
1. Tighten the fasteners
2. Check for proper oil level; if the oil level is low, check
for possible damage to the bearings. Dirty oil can
cause excessive wear.
3. Replace the connecting rod. Maintain the oil level and
change the oil more frequently.
4. Remove the piston assemblies from the compressor
and inspect for excess wear. Replace the excessively
worn piston pin or pistons, as required. Maintain the oil
level and change the oil more frequently.
5. Remove the compressor head and the valve plate and
inspect for carbon deposits or other foreign matter on
the top of the piston. Replace the head and the valve
plate using the new gasket. See the Lubrication section
for the recommended oil type.
6. Replace the check valve. Do not disassemble the
check valve with air pressure in the tank.
1. Replace with new rings. Maintain the oil level and
change the oil more frequently.
2. Clean or replace the fi lter. Check for other restrictions
in the intake system.
3. Drain oil down to the correct full level.
4. Only use Mobil 1 ® 10W-30 or SAE 30 compressor oil.
1. a. Add a fi lter/dryer to reduce the amount of water in
the air line.
b. Add a fi lter/dryer to reduce the amount of water in
the air line.
1. Replace the unloader valve if it does not release
the pressure for a short period of time when the unit
shuts off. Do not disassemble the check valve with air
pressure in the tank.
1. Replace the check valve if the unloader valve on the
pressure switch bleeds off constantly when the unit
shuts off. Do not disassemble the check valve with air
pressure in the tank.
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