Toro Groundsmaster 5900 Series Service Manual page 232

Steering Control Valve Removal
Steering Control Valve Installation
Hydraulic System: Service and Repairs
(Figure
1. Park machine on a level surface, lower cutting decks fully, disengage PTO
and stop engine. Remove key from the key switch.
2. Read the General Precautions for Removing and Installing Hydraulic System
Components (page
3. Remove the steering cover and slide the steering column boot upward (see
Steering Column (For machines serial number below 403450000) (page
7–5)).
4. To prevent contamination of hydraulic system during steering valve removal,
thoroughly clean exterior of steering valve, hydraulic tubes and fittings.
Note: Access to hydraulic line fittings may require removal of five fasteners
securing traction pedal assembly to Operator platform (see
(page 7–37)).
5. Disconnect hydraulic tubes from steering control valve. Put caps or plugs on
fittings and tubes to prevent contamination. Tag hydraulic lines for proper
assembly.
6. Support steering control valve and steering column to prevent them from
falling.
7. Remove four (4) cap screws that secure steering control valve and steering
column to machine. Slide steering control valve from lower end of steering
shaft and remove steering control valve and steering column from machine.
8. Locate and remove alignment bushing (item 18).
9. If necessary, remove fittings from control valve and discard fitting O−rings.
Plug control valve ports to prevent contamination.
(Figure
g288152
1. In port − P
2. Right turn port − R
3. Load sensing port − E
1. If fittings were removed from steering control valve, lubricate and place new
O−rings onto fittings. Remove plugs installed during removal and install
fittings into control valve (see
Thread O-Ring Fittings) (page
2. Apply never seize lubricant to splines on lower end of steering column.
116)
5–73).
116)
1
2
Figure 117
4. Out port − T
5. Left turn port − L
Installing the Hydraulic Fittings (SAE Straight
5–9)).
Page 5–132
Traction Pedal
4
5
3
Groundsmaster ® 5900 & 5910
16227SL Rev B