TROUBLE

PROBABLE CAUSE

REMEDY

 

 

 

 

 

 

Overheating

1. Poor ventilation

1. Relocate the compressor

 

 

to an area where an ample

 

 

supply of cool, clean, dry

 

 

and well-circulated air is

 

 

available

 

2. Dirty cooling surfaces

2. Clean the cooling surfaces

 

 

of pump and motor/engine

 

 

 

Excessive belt wear

1. Pulley out of alignment

1. Realign engine pulley with

 

 

compressor pulley

 

2. Belt too loose or too tight

2. Adjust tension (See Drive

 

 

Belt Section)

 

3. Belt slipping

3. Adjust tension or replace

 

 

belt (See Drive Belt

 

 

Section)

 

4. Pulley wobbles

4. Check for worn crankshaft,

 

 

keyway or pulley bore

 

 

resulting from running the

 

 

compressor or motor with

 

 

loose pulleys. Check for

 

 

bent pulleys or bent crank-

 

 

shaft

 

 

 

Unit stalls

1. Low engine idle

1. Increase idle, refer to

 

 

engine manual for details

 

2. Improper lubrication

2. See LUBRICATION, under

 

 

Assembly

 

3. Low oil level

3. Check oil level. Fill if nec-

 

 

essary

 

4. Defective unloader valve

4. Replace

 

 

 

Excessive noise

1. Loose engine or com-

1. Loose engine or compres-

(knocking)

pressor pulley

sor pulleys are a very com-

 

 

mon 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

 

4. Worn piston pin bushing

4. Remove piston assemblies

 

 

from the compressor and

 

 

inspect for excess wear.

 

 

Replace excessively worn

 

 

piston pin or pistons, as

 

 

required

 

 

 

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