Delta OIL-FREE AIR COMPRESSOR CP503 - Manual (Page 15)

15- ENG A08200
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. Loosen the nut on the outlet tube
and move the outlet tube to the
side.
4. Unscrew the check valve (turn
counterclockwise) using a socket
wrench.
5. Make sure the valve disc moves
freely inside the check valve and
the spring holds the disc in the
upper, closed position. The check
valve may be cleaned with a
solvent, such as paint and
varnish remover.
6. Apply sealant to the check valve
threads. Reinstall the check valve
(turn clockwise).
7. Replace the outlet tube and tighten
the nut.
8. Perform the Break-in Procedure.
See "Break-in Procedure" in the Operation section.
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.
In closed position
disc is visible.
In open
position
nothing is
visible.
Screwdriver
ALL MAINTENANCE AND REPAIR OPERATIONS NOT LISTED MUST BE
PERFORMED BY TRAINED SERVICE TECHNICIAN.
Outlet Tube
Nut
Before servicing:
• Unplug or disconnect electrica supply to the air compressor.
• Bleed tank of pressure.
• Allow the air compressor to coo.
Check
Valve