Service And Repair
Replacing the Check Valve Assembly
34
14. Reinstall the extractable unit into the manifold and tank. Torque the extractable lock-down nuts in an alternating
pattern to 50 ft-lbs (68 N•m).
Remove the springs around the lock-down studs and replace with the springs from the kit.
15. Turn the air purge screw 2 - 3 turns counterclockwise (see Figure 26).
The air purge screw is retained by a hitch pin to limit travel. Do not attempt to rotate
beyond 3 turns.
16. Turn the pump on and let it run for about 2 minutes to purge air from the manifold’s hydraulic cavities. While
the pump is still running, turn the air purge screw clockwise until it is completely closed.
17. If applicable, open the ball valve down line from the pump.
Replacing the Check Valve Assembly
Disconnect, lock out, and tag power at the panel before servicing the
pump.
When servicing equipment, use non-sparking tools and use caution when removing or in-
stalling equipment to avoid generating a spark.
Kits Required:
• Check Valve Housing Kit (P/N 410152-001 or 410152-002),
OR
• Check Valve Kit (P/N 410153-001 or 410153-002) and Hardware/Seal Kit, P/N 410154-001
Procedure:
1.
If a ball valve is installed down line from the pump, close it.
2.
Remove and save the protective plug over the service screw and turn the screw clockwise (see Figure 26 on
page 31). As the screw approaches its bottom position, you will hear the system depressurizing. Continue
turning the screw until it can go no further. When the screw is all the way down, backoff the screw 4 turns to
lift the check valve and let the fuel drain out of the manifold’s hydraulic cavities. Continue to turn the screw
counterclockwise until you hear the check valve drop down into position.
3.
Unscrew the check valve housing. Lift the spring and check valve out of the manifold. Discard the O-ring from
the housing and from the check valve.
If replacing the check valve O-ring, avoid twisting or rotating the O-ring as it is being in-
stalled on the check valve.
4.
Get the new check valve and spring from the kit. If you have the Check valve housing kit, get the new housing
and O-ring (2.609’’ ID x 0.139’’ wide) from the kit, if you only have the check valve kit, get a new 2.609’’ ID x
0.139’’ wide housing O-ring from the Hardware/Seal Kit.
5.
Lubricate the new housing O-ring and the new 1.859‘’ ID x 0.139’’ wide O-ring on the check valve with
petroleum jelly.
6.
With its lubricated O-ring in place, insert the check valve onto its seat in the manifold, and place the new
spring over the check valve (see Figure 30). Place the check valve housing with O-ring over the spring and
check valve and screw it in hand tight. Torque the housing to 40 - 50 ft-lbs (54 - 67 N•m).
NOTICE
WARNING
OFF
WARNING
NOTICE
