Delta Oil-Free 66-651 User Manual download pdf (Page 20)

20- ENG

D26195

PROBLEM

CAUSE

CORRECTION

It is normal for "some"

pressure drop to occur.

If there is an excessive

amount of pressure drop

when the accessory is used,

adjust the regulator following

the instructions in the

"Description of Operation"

paragraph in the "Operation

Section.

NOTE: Adjust the regulated

pressure under flow

conditions (while accessory

is being used).

Possible defect in safety

valve.

Operate safety valve

manually by pulling on ring.

If valve still leaks, it should

be replaced.

Defective check valve. Remove and clean, or

replace.

Knocking Noise.

Compressor is

not supplying

enough air to

operate

accessories.

Prolonged excessive use of

air.

Compressor is not large

enough for air requirement.

Hole in hose.

Check valve restricted.

Air leaks.

Restricted air intake filter

Decrease amount of air

usage.

Check the accessory air

requirement. If it is higher

than the SCFM or pressure

supplied by your air

compressor, you need a

larger compressor.

Check and replace if

required.

Remove and clean, or

replace.

Tighten fittings.

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.

Damaged regulator Replace

Regulator knob

has continuous

air leak.

Pressure reading

on the regulated

pressure gauge

drops when an

accessory is

used.

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