RIDGID GP90150A User Manual

Page 17

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17

TROUBLE

PROBABLE CAUSE

REMEDY

Overheating

Excessive belt wear

Unit stalls

Excessive noise
(knocking)

1. Poor ventilation

2. Dirty cooling surfaces

1. Pulley out of alignment

2. Belt too loose or too tight

3. Belt slipping

4. Pulley wobbles

1. Low engine idle

2. Improper lubrication

3. Low oil level

4. Defective unloader valve

1. Loose engine or com-

pressor pulley

2. Lack of oil in crankcase

3. Worn connecting rod
4. Worn piston pin bushing

1. Relocate the compressor

to an area where an ample
supply of cool, clean, dry
and well-circulated air is
available

2. Clean the cooling surfaces

of pump and motor/engine

1. Realign engine pulley with

compressor pulley

2. Adjust tension (See Drive

Belt Section)

3. Adjust tension or replace

belt (See Drive Belt
Section)

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

1. Increase idle, refer to

engine manual for details

2. See LUBRICATION, under

Assembly

3. Check oil level. Fill if nec-

essary

4. Replace

1. Loose engine or compres-

sor pulleys are a very com-
mon 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
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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