HYDRAULICS
8N-47
POWER STEERING SYSTEM TEST
The purpose of this test is to determine if the steering
cylinder and the steering unit are operating properly
(Figure 8N-3).
NOTE:
Before performing the test, check the steering
systems for mechanical binding and damage that
may effect the steering.
1. With the engine running, turn the steering wheel
all the way right and then all the way left.
Conclusion
• If the steering wheel becomes hard to turn or stops
turning and a hissing sound is heard after steering
the maximum right and/or left, the steering unit is not
at fault.
• If the steering wheel continues to turn, proceed with
the test.
2. Remove both hydraulic hoses from the steering
cylinder, plug the hoses and cap the cylinder
ports.
3. Turn the steering wheel all the way to the right and
then all the way left.
Conclusion
• If the steering wheel becomes hard to turn or stops
turning the cylinder is at fault and should be repaired
or replaced.
• If the steering wheel continues to turn, perform an
instrument test, see Section 8O.
Figure 8N-3. Power Steering System
Steering Unit
Steering Cylinder
Hoses
Steering Cylinder
Steering Cylinder
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