Maintenance
3A1183C
17
10. Reassemble intake valve with new O-ring (227),
seat (212) and ball (214), Seat may be flipped over
and used on other side. Clean seat thoroughly.
11. Install intake valve on cylinder. If a wrench is used
torque as follows:
•
80 +/-5-ft-lb
If a wrench is not used, be sure intake valve is bottomed
out against cylinder.
12. Torque packing nut (202) down onto adjustment
spacer (228) 100 +/-10 in-lb.
Remove throat adjustment spacer (228) when pump
packings begin to leak after much use. Then tighten
packing nut down until leakage stops or lessens. This
allows approximately 100 gallons of additional operation
before a repacking is required.
Replacement of Electrical
Components
Pressure Control Assembly (Electrical
Control Board)
1.
Unplug machine’s power cord.
2.
Remove screws and lower the pressure control
assembly.
3.
Disconnect all leads from pressure control assem-
bly.
4.
Reassemble in reverse order.
Sensor
1.
Remove the screws and lower the pressure control
assembly.
2.
Disconnect sensor lead from the board.
3.
Unscrew sensor from pressure control assembly
using a 3/4” wrench.
4.
Reassemble in reverse order. Use PTFE tape on the
sensor threads prior to reinstalling it into the pres-
sure control assembly.
Potentiometer
1.
Lower pressure control assembly as described
above.
2.
Disconnect potentiometer lead from pressure con-
trol assembly.
3.
Use a 1/16” allen wrench, loosen set screw in the
poteniometer knob and remove knob and spacer.
4.
Using a 1/2” wrench or deep socket, remove the nut
from the potentiometer shaft assembly.
5.
Pull entire potentiometer assembly out of the frame.
6.
Replace in reverse order.
214
212
227
7570f
7569a
202
228
7568a
Always unplug the electrical cord before servicing the
machine.
