Toro ProLine H800 Service Manual page 118

Test Procedure (continued)
Hydraulic System: Testing the Hydraulic System
A. There should be no shaking or vibration in the steering wheel or rear
wheels.
B. The steering wheel movements should be followed immediately by
a corresponding rear wheel movement without the steering wheel
continuing to turn.
3. Stop unit with the engine running. Turn the steering wheel with small quick
movements in both directions. Let go of the steering wheel after each
movement.
A. The steering control valve should respond to each steering wheel
movement.
B. When steering wheel is released, steering control should return to the
NEUTRAL position with no additional turning.
g292612
1. Hose
2. Steering control valve
3. Hose
4. If either of these performance tests indicate a steering problem, determine if
the steering cylinder is damaged using the following procedure:
A. Park the machine on a level surface with the PTO switch off, lower the
cutting deck, and set the parking brake.
B. With the engine running, turn the steering wheel to the right (clockwise)
until the steering cylinder rod is fully extended and shut off the engine.
C. Read all Warnings, Cautions, and precautions listed at the beginning
of this section.
D. Clean the fitting and hose end on the right (piston extended) side of the
steering cylinder. Then, disconnect the hose.
E. Use an elbow or a tee fitting with a hole plugged and install a pressure
gauge at the end of the disconnected hose.
F. With the engine shut off, continue turning the steering wheel to the right
(clockwise) with the steering cylinder fully extended. Monitor the open
fitting on the steering cylinder as the wheel is turned. If the hydraulic fluid
comes out of the fitting while turning the steering wheel to the left, the
steering cylinder has internal leakage and should be repaired or replaced.
Figure 56
4. Fitting
5. Steering cylinder
Page 5–50 ProLine H800
19241SL Rev A