ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
0053 00
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
HIGH PRESSURE PUMPS
b. Carefully wipe off any superficial rust/dirt prior to reassembly.
c. Remove and replace O-rings.
d. Inspect the body bearing for wear or damage. If damaged, replace the body bearing.
Refer to High Pressure Pump Repair.
BODY BEARING
O-RING
ALIGNMENT PIN
CYLINDER
Figure 9. Piston Body Inspection.
6. Discard the old piston assemblies and install the new piston assemblies from the kit except for
two, one from each side into the body.
a. Replace old O-rings on the piston body. Use a little glycerin to hold the O-rings in place.
b. Apply glycerin to the body bearing and install the piston body on the cam spacer making
sure to line up the pencil scribe marks (see Figure 10).
NOTE
Make sure that the pistons line up with the cups in the piston cluster.
c. Install the last two pistons.
d. Push all the pistons down into the piston cluster as far as they will go.
PISTON ASSEMBLY
PISTON CLUSTER
CAM SPACER
PISTON BODY
Figure 10. Piston Body Assembly Installation.
CAUTION
Once the pistons are set into the cluster do NOT turn the high-pressure pump shaft
(cam shaft) for any reason. Failure to observe this caution may result in serious
damage to the pump when it is started up.
0053 00-10
