ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
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TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
HIGH PRESSURE PUMPS
23. Inspect and (if necessary) replace the manifold (see Figure 37).
NOTE
The manifold permits fluid transfer from the inlet port to the valves and again from
the valves to the outlet port. The inner of the two manifold channels carries high-
pressure fluid to the outlet port from the check valves. The outer channel carries
low-pressure fluid from the inlet port to the check valves.
a.
Inspect all ports, fittings, and threads for deterioration or damage.
b.
Remove and discard all O-rings.
c.
Inspect all O-ring grooves for scratches, deterioration, or signs of leakage.
d.
Inspect the manifold channels. If any delamination or structural cracks are present on the
manifold's channels (annular grooves), O-ring grooves, or ports, the manifold must be
replaced.
e. Inspect inlet and outlet nipples for damage, wear, or corrosion. Replace as needed.
f. Install new O-rings.
INLET PORT
BOTTOM OF MANIFOLD
OUTLET NIPPLE
INNER O-RING
INLET NIPPLE
CENTER O-RING
HPP MANIFOLD
OUTER O-RING
OUTLET PORT
Figure 37. HPP Manifold Inspection.
24. Install the manifold as follows:
NOTE
Apply a little glycerin on the three O-rings on the bottom side of the manifold to
hold them in place.
a. Install the manifold onto the valve housing (see Figure 38).
NOTE
It may be necessary to rotate the manifold to properly orient it to the tapped holes
in the bearing plate.
b. Install and torque the center mounting bolt to 150 in.-lbs.
c. Install the bolts at the outer diameter of the manifold and torque them to 150 in. lbs. in the
sequence shown in Figure 38.
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