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 TM 9-2320-285-24-2
3-42.
FIFTH WHEEL HYDRAULIC SYSTEM MAINTENANCE (CONT)
c. Hydraulic Control Valve (cont).
STEP
LOCATION
ITEM
ACTION
REMARKS
REASSEMBLY (cont)
6
Hydraulic
a.
Poppet (36),
Install
In housing (37)
control
new O-ring
valve
(35), and
seat (34)
b.
Relief spring
Install
On relief spring guide (31)
(32)
c.
New O-ring (28)
Install
On adjusting screw (26)
d.
Jam nut (25)
Install
On adjusting screw (26)
and acorn nut
(24)
e.
New washer (27)
Install
In body (29)
f.
Ball (30)
Install
In seat (34)
g.
New gasket (33)
Position
Against body (29)
h.
Adjusting screw
Install
In housing (37). Tighten jam
(26) assembly
nut (25) and acorn nut (24)
(24 thru 33)
hand tight only
i.
Check poppet
Install
(23), new
O-ring (22),
and check
plug (21)
j.
Metering spool
a. Install
Install threaded end first
(19)
from O-ring seal (18) end
of housing (37)
b. Move
Push spool far enough into
housing to expose O-ring
seal (20) groove in spool
k.
New O-ring seal
Install
(20)
NOTE
Exercise care that O-ring seal (20) is not twisted or rolled in O-ring groove.
l.
Metering spool
Move
Pull spool into housing (37)
(19)
far enough to expose O-ring
(18) groove in spool
m. New O-ring seal
Install
(18)
3-439
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