7.
and secure with four (4) screws and flange nuts.
Position steering column brace (item 13) to machine
CAUTION
8.
9.
shroud (Fig. 98). Position shroud in place and secure
with removed fasteners.
Slide rubber bellows to bottom of steering column.
Place rubber bushings and spacers into holes of
Before opening hydraulic system, operate all hy-
draulic controls to relieve system pressure and
avoid injury from pressurized hydraulic oil. See
Relieving Hydraulic System Pressure in the Gen-
eral Information section of this chapter.
10.Check
oil level in hydraulic reservoir and add correct
oil if necessary.
7.
Disconnect hydraulic lines from steering control
valve. Allow lines to drain into a suitable container.
11.
Follow Hydraulic System Start--up procedures (see
Hydraulic System Start--up in this section).
8.
Put caps or plugs on disconnected lines and fittings
to prevent contamination.
3
9.
screws and flange nuts that secure steering column to
machine.
Loosen and remove remaining two (2) socket head
1
2
4
10.Remove
steering column and steering control valve
assembly from machine.
11.
secure steering control valve to steering column.
Loosen andremove four (4) socket head screws that
5
3
12.Remove
umn.
steering control valve from steering col-
6
7
8
13.If
ing control valve. Discard all removed O--rings.
necessary,remove fittings and O--rings from steer-
Installation (Fig. 97)
1.
If fittings were removed, lubricate new O--rings with
clean hydraulic oil and install fittings to steering control
valve (see Hydraulic Fitting Installation in the General
Information section of this chapter).
Figure 98
1.
2.
3.
4.
Washer (2 used)
Screw (2 used)
Washer head screw
Platform shroud
5.
6.
7.
8.
Lock nut (2 used)
Cover plate
Bushing (2 used)
Spacer (2 used)
2.
trol valve shaft.
Apply antiseize lubricant to splines of steering con-
3.
Slide steering control valve shaft into steering col-
umn universal joint. Position control valve with ports to-
ward front of machine. Secure steering control valve to
steering column with four (4) socket head screws.
Torque screws in a criss--cross pattern from 84 to 120
in--lb (9.5 to 13.5 N--m).
L
T
4.
cure steering column in place with two (2) socket head
screws and flange nuts at rear two mounting holes.
Position steering column assembly to machine. Se-
5.
and fittings.
Remove caps and plugs from disconnected lines
R
6.
Lubricate new O--rings and connect hydraulic lines
P
to fittings on steering control valve. Tighten connections
(see Hydraulic Hose and Tube Installation in the Gener-
al Information section of this chapter).
Figure 99
Groundsmaster 4300--D
Page 4 -- 109
Hydraulic System
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