ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
0052 00
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
REVERSE OSMOSIS SYSTEM
d. Clean the bearing bore with a clean rag.
e. Place two new O-rings into the grooves on the new bearing. Lubricate the O-rings and
bearing bore with glycerin.
f. Gently insert the bearing into the bore until it is fully seated, making sure the O-rings are
not pinched.
g. Install the bearing retaining ring.
8. If needed, replace the thrust bearing as follows (see Figure 25):
a. Place the turbine end cap on a clean surface with the bearing side facing down.
Support the cap on small blocks placed around the edge of the bearing bore so the
bearing is free to drop out of the bore.
b. Tap around the edge of the thrust bearing until it drops out of the bore. Discard the
bearing and O-ring.
c. Clean the bearing bore with a clean rag.
d. Place a new O-ring into the groove on the new bearing. Lubricate the O-ring and
bearing bore with glycerin.
e. Making sure the small hole in the thrust bearing is lined up with the straight adapter at
the top of the turbine end-cap bore. Gently insert the bearing into the bore until it is fully
seated. Make sure the O-ring is not pinched.
9. Reassemble the turbocharger as follows (see Figure 25):
a. Insert the turbine impeller/shaft assembly through the turbine end of the center bearing.
CAUTION
Make sure the washer is evenly seated in its counter-bore in the pump impeller.
Improper seating can cause equipment damage from impeller misalignment or
loosening of the screw.
NOTE
It may be necessary to insert a thin screwdriver or other tool into the turbocharger
plug hole to keep the impeller from turning while you install the retaining screw.
b. Install the impeller key, pump impeller, washer, and screw. Torque the screw to 72 in.-
lbs.
c. Install the plug if removed.
d. Position the casing vertically with the pump end facing up.
e. Slide a new O-ring onto the pump end cap.
f. Carefully slide the end cap into the casing until it is fully seated, making sure the thrust
bearing water supply tube connection is toward the top (label side) of the casing.
Fasten the cap in place using the four cap screws. Torque to 240 in.-lbs.
g. Position the casing vertically with the turbine end facing up.
h. Slide a new O-ring onto the turbine end cap.
i. Carefully slide the end cap into the casing until it is fully seated, making sure the thrust
bearing water supply tube connection is toward the top (label side) of the casing.
Fasten the cap in place using the four cap screws. Torque to 240 in.-lbs.
j. Reinstall the thrust bearing water supply tube.
10. Reinstall the turbocharger on its base plate and then on the TWPS. Refer to REPLACE and
Pressure Recovery Turbocharger PRT-1.
END OF WORK PACKAGE
0052 00-32
