Troubleshooting Chart - Campbell Hausfeld Portable Air Compressor Operating Instructions Manual

Operating Instructions

Troubleshooting Chart

Symptom
Low discharge pressure
Pump overheating causes
air filter to melt
Excessive noise (knocking)
Large quanity 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.
Water in discharge air /
tank
Motor hums and runs
slowly or not at all
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Possible Cause(s)
1. Air demand exceeds pump capacity
2. Air leaks
3. Restricted air intake
4. Blown gaskets
5. Leaking or damaged valves
1. Insulating gasket between filter and
head is missing
2. Broken valves/blown gasket
1. Loose motor or compressor pulley
2. Lack of oil in crankcase
3. Worn connecting rod
4. Worn piston pin bores
5. Piston hitting the valve plate
6. Noisy check valve in compressor
system
1. Worn piston rings
2. Compressor air intake restricted
3. Excessive oil in compressor
4. Wrong oil viscosity
Normal operation. The amount of
water increases with humid weather
1. Use of extension cord
2. Malfunctioning check valve or
unloader valve
3. Low voltage
4. Malfunctioning pressure switch -
contacts will not close
Corrective Action
1. Reduce air demand or use a compressor with more capacity.
2. Listen for escaping air. Apply soap solution to all fittings and
connections. Bubbles will appear at points of leakage. Tighten or
replace leaking fittings or connections.
3. Clean the air filter element.
4. Replace any gaskets proven faulty on inspection.
5. Remove 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. Install gasket.
2. Replace valves or install new gasket.
1. Loose motor or compressor pulleys are a very common cause of
compressors knocking. Tighten pulley clamp bolts and set-screws.
2. Check for proper oil level; if low, check for possible damage to
bearings. Dirty oil can cause excessive wear.
3. Replace connecting rod. Maintain oil level and change oil more
frequently.
4. Remove piston assemblies from the compressor and inspect for
excess wear. Replace excessively worn piston pin or pistons, as
required. Maintain oil level and change oil more frequently.
5. Remove the compressor head and valve plate and inspect for
carbon deposits or other foreign matter on top of piston. Replace
head and valve plate using new gasket. See Lubrication section for
recommended oil.
6. Replace.
Do not disassemble check
valve with air pressure in tank
1. Replace with new rings. Maintain oil level and change oil more
frequently.
2. Clean filter. Check for other restrictions in the intake system.
3. Drain down to full level.
4. Use Mobil 1 10W-30.
®
1. Drain tank more often. At least daily.
2. Add a filter to reduce the amount of water in the air line.
1. Do not use an extension cord. Use longer air hose with larger
diameter.
2. Replace check valve, unloader valve or pressure switch.
Do not disassemble check
valve with air pressure in tank
3. Check with voltmeter, check reset switch on motor. If reset switch
trips repeatedly, find and correct the cause. See next item.
4. Repair or replace pressure switch.
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