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TM 10-4320-351-14
a.
Removal.
(1)
Lay pump on inlet.
(2)
Remove rotary shaft seal housing and components. Refer to paragraph 5.4.2
(3)
Remove thrust washer (1) from shaft.
(4)
Remove dowel pin (2) from shaft.
(5)
Remove the six socket head screws (3) and flat washers (4) that secure the vane pump housing (5) to the
impeller housing (6).
(6)
Install three 1/4-28 x 1-1/2 inch jack bolts in the threaded holes spaced around the vane pump housing
circumference. Remove vane pump housing by alternately tightening the jack bolts until housing is free.
NOTE
Count shims to ensure same number is installed during assembly.
(7)
Lift housing (5) and shims (7) from shaft.
CAUTION
Do not attempt to remove carbon bearing in vane pump housing. Bearing can only
be replaced at the depot.
(8)
Remove and discard both O-rings (8) from face of vane pump housing.
(9)
Inspect and clean O-ring grooves as required. Any debris or foreign matter may prevent O-ring from
seating properly.
(10)
Inspect and clean the mounting surface and vertical lip of the pump housing where the vane pump housing
is attached. Ensure all paint and debris have been removed.
b.
Installation.
CAUTION
Ensure inlet is installed before commencing this procedure. Inlet installation will
prevent the thrust washer dowel falling out of place. Equipment damage will occur
if pump is run with a loose dowel. Ensure all paint and debris have been removed
from area of vane pump housing seat. Any debris will cause vane pump housing
to be misaligned and equipment damage will result.
(1)
Lightly lubricate O-rings (8) with petrolatum and install in O-ring grooves on vane pump housing (5). Do not
allow the O-rings to twist or roll during installation.
5-13
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