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 TM 55-1905-221-14-2
5-6.1. RAMP HOIST HYDRAULIC PUMP (Continued).
LOCATION/ITEM
ACTION
REMARKS
REASSEMBLY (Cont)
c.
Install shaft snap ring (18),
and bearing retaining ring
(19). Make sure that both
parts are firmly seated in
place. Remove tape from end
of shaft (17).
d.
Install the shaft key (16).
NOTE
Direction of rotation is designated as viewed from the shaft end of pump. R. H.
rotation is clockwise; L. H. rotation is counter-clockwise.
e.
Place rotor (14) on pressure
plate (9) with arrow pointing
in desired direction of
rotation. Install inserts
in vanes (15), and position
both parts in rotor slots.
The sharp edges of the vanes
must be toward the direction
of rotation.
f.
Install locating pins (12) in
pressure plate (9). Install
ring (13) over locating pins
against pressure plate with
arrow pointing in direction
of shaft rotation. Lubricate
rotor (14), and ring with
clean hydraulic oil.
g.
Install O-ring (5), and backup
ring (8) in groove on hub
diameter of pressure plate (9).
Install a backup ring (7) and
O-ring (6) around large step
diameter of pressure plate.
Make sure that the smooth
sides of the backup rings
face the sealing rings.
5-74
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