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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
INSTALLATION (cont)
7
h.
Pin (2)
Install
Push through center hole in
(cont)
handle (5) and hole in
metering spool (19)
i.
New cotter pin
Install and
(1)
spread
8
Hydraulic
a.
Control cable
Connect
Para 2-78a
control
b.
Hydraulic lines
Install
Para 2-78b(2)
valve and fittings
9
Hydraulic
a.
Hydraulic
Fill
To proper level
system
reservoir
b.
Hydraulic
Bleed
Bleed hydraulic system by
system
opening bleed valve and
alternately raising and
lowering fifth wheel until
air is purged from system
c.
Hydraulic
Check
Check fluid level. Add fluid
reservoir
to maintain proper level
(see current lubrication
order)
ADJUSTMENT
10
Fifth wheel
a.
Fifth wheel
Lower fully
boom boom
b.
Pipe plug (38)
Remove
From tee (39)
c.
3000 psi pres-
Install
In tee (39)
sure gage
11
Hydraulic
a.
Acorn nut (24)
Remove
control
b.
Jam nut (25)
Loosen
valve
12
Tractor
a.
Engine
Start
cab
b.
Power take-off
Engage
c.
Engine
Operate
At 2500 rpm
CAUTION
Do not hold fifth wheel control lever back for more than 15 seconds at a time.
3-441
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