Toro Groundsmaster 3280-D Service Manual page 198

Removing the Steering Control Valve
Hydraulic System: Service and Repairs
1. Park the machine on a level surface, set the parking brake, lower the cutting
deck (or implement), shut off the engine, and remove the key from the key
switch.
2. Remove the knob (item 12 in
3. Remove the 6 phillips-head screws (item 9 in
tower panel to the machine, and remove the tower panel.
4. Read the General Precautions for Removing and Installing the Hydraulic
System Components (page
g224772
5. For assembly purposes, label all the hydraulic connections. Note the port
designations on the steering control valve
6. Clean the hydraulic connections before loosening the hydraulic lines.
Before opening hydraulic system, operate all the hydraulic controls
to release system pressure and avoid injury from the pressurized
hydraulic fluid; refer to
System (page 5–6).
7. Disconnect the hydraulic lines from the steering control valve. Allow the
lines to drain into a suitable container.
8. Install clean caps or plugs on the hydraulic lines and fittings to prevent
contamination.
9. Support the steering control valve to prevent it from falling during removal.
10. Loosen and remove the 4 socket-head screws (item 21 in
secure the steering control valve to the steering column.
11. Slide the steering control valve from the steering column, and remove the
steering control valve from the machine.
12. If necessary, remove the hydraulic fittings from the steering control valve.
13. Remove and discard the O-rings from the fittings.
Figure 94) from the end of the parking brake rod.
5–77).
Figure 95
(Figure
CAUTION
Releasing Pressure from the Hydraulic
Page 5–114
Figure 94) that secure the
95).
Figure 94) that
Groundsmaster ® 3280-D/3320
05138SL Rev B