Pump Servicing
Inlet Valve Removal
1. Remove the pump head from the body.
Note:
Be careful not to damage parts below so they
can be reused if not worn
2. Remove the first seal by inserting a screw driver
(or other device for levering) under the lip of the
seal and lift it up.
3. Using a pair of reversible pliers, carfully remove
the seal retainer from the head.
4. Carefully remove the check valve with a pair of
needle nose pliers.
5. Use a small probe to move the poppet up
and down inside the valve to insure it is function
properly.
6. Remove any debris lodged between the spring
and poppet or the poppet and seat.
7. Inspect the seat o-ring for damage and replace
if damage is discovered.
Inlet Valve Installation
1. Insert the valve assembly squarely into the
valve port and firmly push it in using your finger.
Should be quite snug when seated all of the way.
2. Insert the first water seal (it wil be the thicker
one) and with your finger press it into the valve
port with the flat side facing up. Should be a tight
fit.
3. Assemble the retainer with the remaining water
seal inplace (flat side facing up). Lubricate the re
-
tainer o-ring then insert the assembled retainer all
of the way into the valve port. The retainer should
stick out past the head surface.
4.Reinstall head and torque bolts to 221 ft. lbs.
Troubleshooting
Symptom
Possible Cause
Corrective Action
Water leakage from under
manifold
Worn packing or cracked
plunger
Install new packing or plunger
Slight leak, oil leaking in the
area of the crankshaft
1. Worn crankshaft seal or
improperly installed oil seal
1.Remove oil seal retainer and install new oil
seal
2. Bad Bearing
2. Install new bearing
Water in crankcase
1. Humd air condensing into
water inside the crankcase
1. Change oil
2. Worn packing and/or
cracked plunger
2. Replace packing and/or plunger
Loud knocking noise in
pump
1. Cavitation or sucking air
1. Check that water supply is turned on
2.Broken or worn bearing
2. Replace bearing