SkyTrak 6036 Service Manual - Manual (Page 179)

8-27 6036, 6042, 8042, 10042, 10054
Hydraulic System
2. Remove the plastic cap from the brake bleeder (2).
Attach one end of a length of transparent tubing over
the brake bleeder. Place the other end of this tubing
in a suitable transparent container that is partially
filled with hydraulic oil. The end of the tubing must be
below the oil level in the container.
3. DO NOT open the brake bleeder without holding the
tubing firmly on the bleeder. There is pressure at the
brakes. Carefully open the bleeder with a wrench.
Have the assistant depress the brake pedal. Close
the brake bleeder when air bubbles no longer appear
in the oil. Release the brake pedal. Remove the
tubing from the brake bleeder.
4. Repeat Steps 2 and 3 for remaining brake bleeders.
5. Conduct a pressure and function check of service
brake. Refer to Section 8.4.1, “Hydraulic Pressures.”
8.7.6 Power Steering Valve
The power steering valve (3) is located at the base of the
steering wheel shaft, concealed by the lower dash cover.
The valve is not serviceable and must be replaced in its
entirety if defective. For detailed information refer to
Section 4.3.1, “Steering Column and Steering Valve.”
8.7.7 Steer Select Valve
The machine can be used in the front-wheel, four-wheel
or crab steering mode. The steer select valve (4) controls
the direction of hydraulic fluid flow to the steering
cylinders mounted on each axle. The steer select valve is
attached to a manifold mounted to a mounting plate
inside the frame near the fuel tank.
Verify the correct operation of the steer select valve
solenoids before considering replacement of the valve.
The housing of the steer select valve is not serviceable
and must be replaced if defective.
a. Steer Select Manifold and Valve Removal
1. Park the machine on a firm, level surface, level the
machine, fully retract the boom, raise the boom, place
the transmission control lever in (N) NEUTRAL,
engage the park brake and shut the engine OFF.
2. Place a Do Not Operate Tag on both the ignition key
switch and the steering wheel, stating that the
machine should not be operated.
3. Temporarily block up or support the raised boom.
4. Open the rear door. Allow the system fluids to cool.
5. Properly disconnect the battery.
6. Remove the transmission covers.
7. Label, disconnect and cap hydraulic hoses and
electrical plugs connected to steering select valve.
8. Remove the bolts holding the steer select valve to
the mounting plate on the frame.
9. Remove steer select manifold with attached steer
select valve from machine. Wipe up any hydraulic
fluid spillage in, on, near and around the machine.
MAQ1110
2
8042, 10042, 10054
MZ0370
3
MH6190
4