Toro Groundsmaster 4500-D Series Service Manual page 242

Removal (Figure 130) (continued)
Installation (Figure
Hydraulic System: Service and Repairs
9. Put caps or plugs on disconnected lines and fittings to prevent contamination.
10. Loosen and remove four (4) socket head screws and flange nuts that secure
steering column to machine.
11. Remove steering column assembly with steering control valve attached from
machine.
12. Loosen and remove four (4) socket head screws that secure steering control
valve to steering column. When removing screws, tilt steering column for
easier screw access.
13. Remove steering control valve from steering column.
14. If necessary, remove fittings and O-rings from steering control valve. Discard
all removed O-rings.
130)
1. If fittings were removed, lubricate new O-rings with clean hydraulic oil and
install fittings to steering control valve (see
(SAE Straight Thread O-Ring Fittings) (page
2. Apply antiseize lubricant to splines of steering control valve shaft.
3. Slide steering control valve shaft into steering column universal joint. Position
control valve with ports toward front of machine. Secure steering control
valve to steering column with four (4) socket head screws. Torque screws in
a criss-cross pattern from 9.5 to 13.5 N·m (7 to10 ft-lb).
4. Position steering column assembly to machine. Secure steering column in
place with four (4) socket head screws and flange nuts.
5. Remove caps and plugs from disconnected lines and fittings.
6. Lubricate new O-rings and connect hydraulic lines to fittings on steering
control valve (see
(page 5–7)).
7. Position steering column brace (item 12) to machine and secure with four (4)
flange head screws.
8. Slide rubber bellows to bottom of steering column.
9. Position platform shroud in place and secure with removed fasteners
131).
10. Check oil level in hydraulic reservoir and add correct oil if necessary.
11. Follow Hydraulic System Start-up procedures (see
(page 5–90)).
Installing Hydraulic Hoses and Tubes (O-Ring Face Seal)
Page 5–140
Installing the Hydraulic Fittings
5–9)).
Priming Hydraulic Pumps
Groundsmaster ® 4500-D/4700-D
19245SL Rev A
(Figure