Delta Oil-Free 66-651 User Manual download pdf (Page 16)

16- ENG

D26195

Air Compressor Pump Intake and Exhaust Valves

Once a year have a Trained Service Technician check the air compressor pump

intake and exhaust valves.

If it is dirty, replace it with a new filter. On some models,the filter may be

removed by using a pair of needle nose pliers or a screwdriver. Pull or pry out

the old filter and carefully clean the filter area. Push in the new air filter.

SERVICE AND ADJUSTMENTS

Unit cycles automatically when power is on. When doing

Maintenance, you may be exposed to voltage sources,

compressed air or moving parts. Personal injuries can occur. Before

performing any Maintenance or repair, unplug the compressor and bleed

off all air pressure.

ALL MAINTENANCE AND REPAIR OPERATIONS NOT LISTED MUST BE

PERFORMED BY A TRAINED SERVICE TECHNICIAN.

To Replace or Clean Check Valve

1. Release all air pressure from air tank. See "To Drain Tank" in the

Maintenance section.

2. Unplug outfit.

3. Using an adjustable wrench, loosen outlet

tube nut at air tank and pump. Carefully

move outlet tube away from check valve.

4. Using an adjustable wrench, loosen

pressure relief tube nut at air tank and

pressure switch. Carefully move pressure

relief tube away from check valve.

5. Unscrew the check valve (turn

counterclockwise) using a 7/8" open end

wrench. Note the orientation for

reassembly.

6. Using a screwdriver, carefully push

the valve disc up and down. NOTE:

The valve disc should move freely

up and down on a spring which

holds the valve disc in the closed

position; if not the check valve

needs to be cleaned or replaced.

7. Clean or replace the check valve. A

solvent, such as paint or varnish

remover can be used to clean the

check valve.

Outlet Tube

Check

Valve

Nut

Pressure

Relief

Tube

In closed position

disc is visible.

In open

position

nothing is

visible.

Screwdriver

Before servicing:

• Unplug or disconnect electrica supply to the air compressor.

• Bleed tank of pressure.

• Allow the air compressor to cool.

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Delta Oil-Free 66-651 User Manual Page 16

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