Delta Oil-Free 66-651 - Manual (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
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.