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 TM 55-1905-221-14-2
5-6.1. RAMP HOIST HYDRAULIC PUMP (Continued).
LOCATION/ITEM
ACTION
REMARKS
DISASSEMBLY (Cont)]
d.
Remove O-rings (5and 6) and
backup rings (7 and 8) from
hub and outside diameter of
pressure plate (9).
e.
Remove two screws (10) from
face of wear plate (11). Lift
wear plate from locating pins
(12), and remove pins.
f.
Remove ring (13) from around
the rotor (14).
g.
Remove vanes and inserts (15)
from rotor, and remove rotor
from the pressure plate.
h.
Lift out shaft key (16)
Check bearing
from its seat in shaft (17).
for wear before
Remove shaft snap ring (18)
removing it
and bearing retaining ring
from shaft.
(19), and fully remove drive
Rotate bearing
shaft and bearing (20) from
applying a
body by gently tapping the
little pressure
keyed end of shaft with a
to outer race,
soft hammer.
to determine if
balls or races
are pitted,
galled, or
cracked.
Check for
looseness. If
in doubt, remove
bearing from
shaft at point
of contact with
bushing and
sealing lip of
shaft oil seal.
If excessive
scoring or
wear is noted,
replace shaft.
5-70
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