Toro Groundsmaster 3280-D Service Manual page 208

Removing the Steering Cylinder (4-Wheel Drive) (continued)
Installing the Steering Cylinder (4-Wheel Drive)
Hydraulic System: Service and Repairs
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
3. For assembly purposes, label all the hydraulic hoses that are connected to
the fittings on the steering cylinder.
4. Clean the hydraulic hose ends before you disconnect the hoses from the
steering cylinder.
5. Disconnect the hydraulic hoses from the steering cylinder.
6. Install caps or plugs on the disconnected hoses and fittings to prevent
contamination.
7. Remove the 4 jam nuts (item 20 in
cylinder to the machine.
8. Separate the steering cylinder ball joints from the axle assembly. Remove
the steering cylinder from the machine.
9. If necessary, remove the ball joints from the steering cylinder.
10. If the hydraulic fittings are to be removed from the steering cylinder, mark
the fitting orientation for assembly purposes. Remove the fittings from the
steering cylinder and discard the O-rings from the fittings.
1. If the hydraulic fittings were removed from the steering cylinder, lubricate new
O-rings with clean hydraulic fluid, position the O-rings to the fittings, and
install the fittings to the steering cylinder; refer to
Fittings (SAE Straight Thread O-Ring Fitting into the Component Port) (page
5–11).
2. If removed, install the ball joints (item 6 in
cylinder and secure the ball joints with the retaining rings.
3. Position the steering cylinder to the rear axle. Secure the steering cylinder to
the axle with the 4 jam nuts (item 20 in
onto the cylinder ball joint threads and torque the jam nut to 95 to 122 N∙m
(70 to 90 ft-lb). Then, hold the first jam nut with wrench, install and torque
the second jam nut to 95 to 122 N∙m (70 to 90 ft-lb).
4. Remove the caps and plugs from the hydraulic hoses and fittings.
5. Lubricate and install new O-rings on the steering cylinder fittings. Correctly
connect the hydraulic hoses to the steering cylinder; refer to
Hydraulic Hose and Tube (O-Ring Face Seal Fitting) (page
6. Check the hydraulic-fluid level in the hydraulic reservoir (front axle) and add
correct quantity of fluid if necessary; refer to the Operator's Manual.
7. Lubricate the steering cylinder ball joint grease fittings; refer to the Operator's
Manual.
8. Operate the machine functions slowly until air is out of system; refer to
Charging the Hydraulic System (page
9. Check that the steering cylinder does not contact the axle or frame as
cylinder moves from fully retracted to fully extended.
CAUTION
Releasing Pressure from the
5–6).
Figure
Figure
5–85).
Page 5–124
100) that secure the steering
Installing the Hydraulic
Figure 100) into the steering
100). Install the first jam nut
Installing the
5–9).
Groundsmaster
05138SL Rev B
® 3280-D/3320