Toro ProLine H800 Service Manual page 181

Removing the Steering Control Valve
ProLine H800
19241SL Rev A
1. Park the machine on a level surface, lower the cutting deck, shut off the
engine, set the parking brake, and remove the key from the key switch.
2. Remove the steering column components to get access to the steering
control valve; refer to
3. Read the General Precautions for Removing and Installing the Hydraulic
System Components (page
4. For assembly purposes, label all the hydraulic connections. Note the port
designations on the steering control valve.
5. Clean the hydraulic connections before loosening the hydraulic lines.
g293899
1. T fitting
2. Hose
3. Fitting
4. Hose
5. Hose
6. Hydraulic control valve
7. Auxiliary control valve
Before opening the hydraulic system, operate all the hydraulic
controls to release system pressure and avoid injury from the
pressurized hydraulic fluid; refer to
Hydraulic System (page
6. Disconnect the hydraulic lines from the steering control valve. Allow the
fluid to drain into a suitable container.
7. Install clean caps or plugs on the hydraulic lines and fittings to prevent
contamination.
8. Remove the steering control valve from the steering column by using the
Figure 88 as a guide.
9. If necessary, remove the hydraulic fittings from the steering control valve.
10. Remove and discard the O-rings from the fittings.
Removing the Steering Column (page
5–63).
Figure 89
8. Height of cut valve
9. Fitting
10. Hose
11. Hose
12. Steering cylinder
13. O-ring
14. Fitting
CAUTION
Releasing Pressure from the
5–5).
Page 5–113
7–9).
Hydraulic System: Service and Repairs