Toro Groundsmaster 4100-D Service Manual page 147

Removal (Fig. 73)
1. Park machine on a level surface, lower cutting deck,
stop engine, engage 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 this section.
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 73 as a guide.
6. If hydraulic fittings are to be removed from steering
control valve, mark fitting orientation to allow correct as-
sembly (Fig. 74). Remove fittings from control valve and
discard O--rings.
Installation (Fig. 73)
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. 74).
Tighten fittings (see Hydraulic Fitting Installation in the
General Information section of this chapter).
2. Install steering control valve using Figure 73 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. Add correct oil if nec-
essary before returning machine to service.
Groundsmaster 4100--D/4110--D
1
1. Steering control valve
2. O- -ring
o
3. 90 hydraulic fitting
Page 4 - - 109
3
2
4
5
Figure 74
4. O- -ring
5. Straight fitting (4 used)
Hydraulic System