Genie GTH-636 Service Manual page 163

June 2007
REV A
14 Activate the drive forward function.
Result: The wheels at one or both ends of the
machine 'drift' and the machine will not drive in
a straight line without steering correction. The
steer selector valve is operating correctly.
Result: The wheels do not 'drift' and the
machine drives in a straight line. The steer
selector valve is faulty and must be repaired or
replaced.
15 Turn off the engine.
16 Disconnect the steer selector valve hose from
one another and install them into the correct
ports of the steer selector valve, and torque to
specification. Refer to Section 2, Specifications.
17 Install the steer selector into the side console.
Install and securely tighten the fasteners.
18 Install the joystick inspection cover to the side
console. Install and securely tighten the
fasteners.
Check the Front Steer Cylinder
19 Start the engine.
20 Move the steer selector to two-wheel steer.
21 Turn the steering wheel to the right until the
wheels turn fully to the right, then turn the
machine off.
22 Tag, disconnect and plug the return hose at the
cylinder. Do not cap the fitting.
23 Start the engine.
Part No. 97487 GTH-636 • GTH-644 • GTH-842 • GTH-844 • GTH-1048 • GTH-1056
24 Turn the steering wheel to the right, then turn
the machine off.
Result: Fluid does not flow from the open fitting
on the steer cylinder. The cylinder is operating
correctly.
Result: Fluid flows from the open fitting on the
steer cylinder. The cylinder is faulty and must
be repaired or replaced.
25 Install the hose, disconnected in step 22, onto
the cylinder and torque to specification. Refer to
Section 2, Specifications.
26 Start the engine.
27 Turn the steering wheel to the left until the
wheels turn fully to the left, then turn the
machine off.
28 Tag, disconnect and plug the return hose at the
cylinder. Do not cap the fitting.
29 Start the engine.
30 Turn the steering wheel to the left, then turn the
machine off.
Result: Fluid does not flow from the open fitting
on the steer cylinder. The cylinder is operating
correctly.
Result: Fluid flows from the open fitting on the
steer cylinder. The cylinder is faulty and must
be repaired or replaced.
31 Install the hose, disconnected in step 28, onto
the cylinder and torque to specification. Refer to
Section 2, Specifications.
Section 5 • Troubleshooting
TROUBLESHOOTING
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