Hydraulic System
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Diagnosis of Problems
Whenever steering complaints are encountered it is important that the complete steering system be
inspected. The steering system consists of the power steering gear, the hydraulic pump, the reservoir, the
steering column, and the connecting steering linkage. The front axle and suspension system components,
as well as the front wheels and tires, must also be considered part of the overall steering system.
DO NOT GO UNDER THE COACH TO SERVICE OR REPAIR
STEERING, AXLE, OR SUSPENSION COMPONENTS WITHOUT
FIRST PLACING SAFETY BLOCKS UNDER THE COACH BODY.
Refer to “Jacking and Towing” in the general information section for
jacking procedures and recommended placement of front and rear
safety blocks.
Steering performance can be affected by misalignment anywhere in the overall steering system. Other
factors outside the steering system itself can also contribute to poor steering performance. The logical
sequence for determining the source of a steering problem is provided below.
Dene the Complaint • Interview the driver.
• Drive the vehicle.
Visual Inspection • Check tires for mismatch and proper air pressure.
• Check for sagging or shifted suspension parts.
Mechanical Components • Check all front axle components for wear, looseness, or seizure.
• Inspect front and rear suspension components.
• Check steering gear mounting to be sure it is tight and not shifting on
the mounting bracket
• Inspect steering column components.
Inspect Hydraulic System • Evaluate hydraulic system performance.
• Ensure hydraulic uid pressure and ow are within specication.
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