TM 9-4940-556-14&P
(Refer to drawing JP7212)
6.2.3 Outlet check valves.
6.2.3.1 To remove pump body outlet check valve:
A. Remove coil from water pump solenoid (item 10).
B. Remove pump hose from spud (item 15).
C. Unscrew solenoid valve (item 10) and nipple (item 4).
D. Disconnect copper tubing assembly (item 7) from elbow (item 1).
E. Remove check valve and fittings - replace - re-install in
reverse order.
6.2.3.2 To remove right pump body outlet check valve:
Disconnect copper tube (item 7) from connector (item 2).
A.
Remove accumulator (item 13).
B.
Separate union (item 3).
c.
Remove check valve and fittings. Replace check valve and
D.
re-install in reverse order.
6.2.3.3 To remove pump and fittings assembly:
A.
Remove hoses from both pump inlet fittings (refer drawing
JP7212).
Remove hose from water pump hose nipple (item 15).
C.
Remove solution feed tube (item H).
D.
E.
Disconnect pump outlet union (item 3).
F.
Loosen two bolts which hold pump rail to channel. Slide
pump to right, remove pump drive belt.
Remove bolts loosened in step F. Remove pump.
G.
To re-install reverse above procedure.
6.2.4 To replace pump packing it is not necessary to completely dis-
assemble pump (refer drawing JP3245).
6.2.4.1
Disconnect unit from power.
6.2.4.2 Rotate pump drive pulley till piston is with-drawn as far as
possible from pump body to be worked on.
6.2.4.3
Un-screw packing nut (item 12) and slide back.
6.2.4.4
Dig out and discard old packing (item 14).
6.2.4.5
Unroll replacement packing and flatten slightly.
6.2.4.6 Work packing into cylinder by rotating pulley by hand allowing
Install packing rings so splits -
packing nut to push against packing.
are not alligned.
6.2.4.7 When last packing ring clears first thread on pump body (item 19
or 20) screw nut in tightly to compress packing, then loosen nut 1/8 turn.
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