Porter-Cable CFFR350C - Manual (Page 15)

6. Unscrew elbow fitting from
the check valve (turn counter-
clockwise) using an adjustable
wrench. Note the orientation of
the elbow fitting for reassembly.
7. 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.
8. Clean or replace the check
valve. A solvent, such as paint or
varnish remover can be used to
clean the check valve.
9. Apply sealant to the check valve
threads. Reinstall the check valve
and elbow fitting (turn clockwise).
10. Replace the pressure release
tube. Tighten nut.
11. Replace the outlet tube and
tighten nut.
12. Perform the Break-in Procedure.
See "Break-in Procedure" in the
Operation section.
15 - ENG A09770
SERVICE AND ADJUSTMENTS
Risk of Unsafe Operation. Unit cycles automatically when
power is on. When servicing, you may be exposed to
voltage sources, compressed air, or moving parts. Before servicing unit
unplug or disconnect electrical supply to the air compressor, bleed tank of
pressure, and allow the air compressor to cool.
ALL MAINTENANCE AND REPAIR OPERATIONS NOT LISTED MUST BE
PERFORMED BY 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 unit.
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.
Pressure Relief Tube
Check Valve
Outlet Tube
Elbow Fitting
Screwdriver
Nuts