Campbell Hausfeld IN228704AV - Manual (Page 5)

5
Single-Stage Compressor Pumps
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Symptom Possible Cause(s) Corrective Action
Low discharge pressure 1 . Air leaks 1 . 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
2 . Slipping belts 2 . Loosen motor clamping bolts and move the motor in
a direction away from the compressor, being sure that
the motor pulley is perfectly aligned with the flywheel .
Tighten motor clamping bolts . The belt should deflect
about 1/2 inch under 5-lbs of pressure . Do not “roll” belts
over pulleys
3 . Air demand exceeds pump
capacity
3 . Reduce air demand or use a compressor with more
capacity
4 . Blown gaskets 4 . Replace any gaskets proven faulty on inspection
5 . Leaking valves 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
6 . Restricted air intake 6 . Clean the air filter element
7 . Low compression 7 . Low pressure can be due to worn rings and cylinder walls .
Correction is made by replacing the rings, cylinders, and
pistons as required
Pump overheating causes
air filter to melt 1 . Broken valves/blown gasket 1 . Replace valve or install new gasket
Excessive noise
(knocking) 1 . Loose motor or compressor
pulley
1 . Loose motor or compressor pulleys are a very common
cause of compressors knocking . Tighten pulley clamp bolts
and set-screws
2 . Lack of oil in crankcase 2 . Check for proper oil level; if low, check for possible
damage to bearings . Dirty oil can cause excessive wear
3 . Worn connecting rod 3 . Replace connecting rod; maintain oil level and change oil
more frequently
4 . Worn piston pin bores 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 . Worn bearings 5 . Replace worn bearings and change oil
6 . Piston hitting the valve plate 6 . 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
7 . Noisy check valve in compressor
system
7 . Replace
Large quantity of oil in
the discharge air
nOTe: Oil lubricated
compressors will always
have a small amount of
oil in the air stream . 1 . Worn piston rings 1 . Replace with new rings . Maintain oil level and change oil
more frequently .
2 . Compressor air intake restricted 2 . Clean filter . Check for other restrictions in the intake
system .
3 . Excessive oil in compressor 3 . Drain down to full level .
4 . Wrong oil viscosity 4 . Use Mobil 1 ® 10W-30
Water in discharge air/
tank 1 . Normal operation . The amount
of water increases with humid
weather
1 . Drain tank more often . At least daily .
2 . Add a filter to reduce the amount of water in the air line .
Troubleshooting Chart