Toro Greensmaster 3120 Service Manual page 174

Removing the Steering Control Valve
Hydraulic System: Service and Repairs
1. Park the machine on a level surface. Lower the cutting units, stop the engine,
engage the parking brake and remove the key from the ignition switch.
2. Read and adhere to the information provided in
Removing and Installing the Hydraulic System Components (page
3. Remove the two (2) screws and the steering wheel cover from the steering
wheel.
4. Remove the lock nut and the flat washer from the steering control valve shaft.
5. Remove the six (6) screws and the steering control valve cover.
6. Remove the four (4) cap screws that secure the steering control valve to the
steering mount and lower the steering control valve (with the hydraulic hoses
attached) from the steering mount.
g218800
1. Steering control valve
2. T port
7. The ports of the steering control valve are marked as shown in . Label all
hydraulic connections for proper assembly.
Before opening the hydraulic system, relieve the hydraulic system
pressure to avoid injury from pressurized hydraulic fluid; refer to
Relieving Pressure from the Hydraulic System (page
8. Disconnect the hydraulic hose assemblies from the hydraulic fittings. Allow
the hoses to drain into a suitable container. Cap and plug the hydraulic hoses
and fittings to prevent system contaminations.
9. If hydraulic fittings are to be removed from the valve, mark the fitting location
to allow for correct assembly. Remove the fittings and discard the O−rings.
Figure 78
3. R port
4. E/Ls port
CAUTION
Page 4–128
General Precautions for
4–71).
5. P port
6. L port
4–4).
Greensmaster 3120
17230SL Rev C