PROBLEM

CAUSE

CORRECTION

Knocking Noise.

Possible defect in safety

Operate safety valve

 

valve.

manually by pulling on ring.

 

 

If valve still leaks, it should

 

 

be replaced.

 

Defective check valve.

Remove and clean, or

 

 

replace.

 

 

 

Compressor is

Prolonged excessive use of

Decrease amount of air

not supplying

air.

usage.

enough air to

Compressor is not large

Check the accessory air

operate

accessories.

enough for air requirement.

requirement. If it is higher

 

 

than the SCFM or pressure

 

 

supplied by your air

 

 

compressor, you need a

 

 

larger compressor.

 

Hole in hose.

Check and replace if

 

 

required.

 

Check valve restricted.

Remove and clean, or

 

 

replace.

 

Air leaks.

Tighten fittings.

 

Restricted air intake filter.

Clean or replace air intake

 

 

filter. Do not operate the air

 

 

compressor with the filter

 

 

removed. Refer to the "Air

 

 

Filter" paragraph in the

 

 

"Maintenance " section.

 

 

 

21- ENG

D24450

Page 21
Image 21
Craftsman 919.72427 owner manual Problem Cause Correction