Toro Groundsmaster 4000-D Service Manual page 149

Removal (Fig. 82)
1. Park machine on a level surface, lower cutting
decks, stop engine, apply parking brake and remove
key from the ignition switch.
2. Read the General Precautions for Removing and
Installing Hydraulic System Components at the begin-
ning of the Service and Repairs section of this chapter.
3. To prevent contamination of hydraulic system during
steering control valve removal, thoroughly clean exteri-
or of control valve and fittings.
NOTE: To ease installation, label the hydraulic lines to
show their correct position on the steering control valve.
4. Remove hydraulic lines from steering control valve.
5. Remove steering control valve from machine using
Figure 82 as a guide.
6. If hydraulic fittings are to be removed from steering
control valve, mark fitting orientation to allow correct as-
sembly. Remove fittings from valve and discard O--rings
(Fig. 83 or 84).
Installation (Fig. 82)
1. If fittings were removed from steering control valve,
lubricate and place new O--rings onto fittings. Install fit-
tings into port openings using marks made during the re-
moval process to properly orientate fittings (Fig. 83 or
84). Tighten fittings (see Hydraulic Fitting Installation in
the General Information section of this chapter).
2. Install steering control valve using Figure 82 as a
guide.
3. Using labels placed during steering control valve re-
moval, properly install hydraulic lines to control valve
(see Hydraulic Hose and Tube Installation in the Gener-
al Information section of this chapter).
4. Make sure hydraulic tank is full.
5. Properly fill hydraulic system (see Charge Hydraulic
System in this section).
Groundsmaster 4000--D/4010--D
1
1. Steering control valve
2. O- -ring
o
3. 90 hydraulic fitting
1
1. Steering control valve
2. O- -ring
o
3. 90 hydraulic fitting
Page 4 - - 111
GROUNDSMASTER 4000- -D
3
2
5
Figure 83
4. O- -ring
5. Straight fitting (4 used)
GROUNDSMASTER 4010- -D
2
3
2
6
Figure 84
4. O- -ring
5. Straight fitting (3 used)
o
6. 45 hydraulic fitting
Hydraulic System
4
4
5
4