25
Instruction Manual
4.6 FASTPRIME™ VALVE O-RING
REPLACEMENT
ALWAYS WEAR PROTECTIVE
CLOTHING, FACE SHIELD, SAFETY
GLASSES AND GLOVES WHEN PERFORMING ANY
MAINTENANCE OR REPLACEMENT ON YOUR PUMP.
Refer to the LMI
®
Metering Pump Price List for
the proper Spare Parts Kit or RPM PRO PAC™
kit number or contact your local LMI
®
stocking
distributor.
1. Be sure the Injection Check Valve is properly
installed and is operating. If a shut off valve
has been installed downstream of the Injection
Valve, it should be closed.
BE SURE YOUR RELIEF TUBING
IS CONNECTED TO YOUR
FASTPRIME™ VALVE AND RUNS BACK TO YOUR SOLUTION
DRUM OR TANK.
2. Turn the FASTPRIME™ Knob one-and-a-half
turns counter-clockwise. This will depressurize
the head. Keep valve open. Carefully remove
the return line by gently pulling tubing and
moving it from side to side to gradually back
tubing off of the barbed fitting.
3. Hold return line tubing upright until solution
drains back into solution drum or tank.
4. Using a 3/4” (or 19mm) socket or wrench
remove Retaining Nut, and pull out the entire
FASTPRIME™ Valve assembly. Remove and
replace the two small O-rings.
5. Reinsert the FASTPRIME™ Valve assembly
and retighten the Retaining Nut. Then turn
the FASTPRIME™ Knob clockwise to tighten
knob to closed position. To avoid damaging
the parts, it is important that the flange on the
FASTPRIME™ Valve is flush with the Retaining
Nut prior to reassembly.
6. Recut 1 to 2 inches off the tip of the return line
and ensure the end is squared. Press the return
line tubing on completely past the barbs.
Note gap between Flange
and Retaining Nut.
INCORRECT
CORRECT
SECTION 4 - MAINTENANCE
Figure 17a
No gap between Flange
and Retaining Nut.
