SkyTrak 6036 Service Manual - Manual (Page 181)

8-29 6036, 6042, 8042, 10042, 10054
Hydraulic System
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. Label, disconnect and cap hydraulic hoses attached
to the unloader valve. Cap all fittings to prevent dirt
and debris from entering the hydraulic system.
7. Remove the hardware securing the unloader valve to
the machine frame.
8. Remove the unloader valve.
b. Unloader Valve Disassembly
DO NOT loosen, disassemble or attempt to adjust any
cartridges unless specifically instructed by the
manufacturer. Tampering with the cartridges will
irrevocably alter pressure in the affected circuits.
c. Unloader Valve Installation
1. Place the unloader valve in its original orientation on
machine frame and secure with previously used
hardware. Torque capscrews to 31 lb-ft (42 Nm).
2. Uncap and connect the previously labeled hydraulic
hoses to their appropriate locations.
Note: ALWAYS replace seals, o-rings, gaskets, etc.,
with new parts to help ensure proper sealing and
operation. Lubricate seals and o-rings with clean
hydraulic oil.
3. Check routing of all hoses, wiring and tubing for
sharp bends or interference with rotating members.
4. Properly connect the battery.
5. Remove the Do Not Operate Tags from both the
ignition key switch and the steering wheel.
6. Start the engine and run at approximately 1/3-1/2
throttle for about one minute without moving the
machine or operating any hydraulic functions.
7. Inspect for leaks and check the level of the hydraulic
fluid in the reservoir. Shut the engine OFF.
Note: Check for leaks and repair as required before
continuing. Add hydraulic fluid to the reservoir as
needed.
8. Wipe up any hydraulic fluid spillage in, on, near and
around the machine, work area and tools.
8.7.9 Outrigger Valve (10042 & 10054 only)
The outrigger valve allows the left and right outriggers to
be raised or lowered depending on the position of the
outrigger switches located on the side console in the cab.
Verify the correct operation of the outrigger valve
solenoids before considering replacement of the valve.
a. Outrigger 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 the hydraulic hoses and
the electrical plugs connected to the outrigger valve.
8. Remove the two flange nuts and two carriage bolts
securing the outrigger valve to the frame. Remove
the outrigger valve from the machine.
9. Wipe up any hydraulic fluid spillage in, on, near and
around the machine, work area and tools.
b. Outrigger Valve Disassembly, Cleaning,
Inspection and Assembly
1. Place the outrigger valve assembly on a suitable
work surface.
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