SkyTrak 8042 Service Manual - Manual (Page 175)

8-31 6036, 6042, 8042, 10042, 10054
Hydraulic System
c. Outrigger Valve Installation
1. Insert the previously used bolts through the bottom
of the outrigger valve and loosely attach the flange
nuts to the carriage bolts.
2. Position the outrigger valve so that the heads of the
carriage bolts go through the slots in the frame.
Tighten the flange nuts.
3. Connect all the previously labeled hydraulic hoses,
fittings, solenoid wire terminal leads, etc., to the
outrigger valve.
4. Check the routing of all hoses and wiring for sharp
bends or interference with any rotating members,
and install tie wraps and/or protective conduit as
required. Tighten all hose clamps.
5. Properly connect the battery.
6. Remove the Do Not Operate Tags from both the
ignition key switch and the steering wheel.
7. 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.
8. 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.
9. Wipe up any hydraulic fluid spillage in, on, near and
around the machine, work area and tools.
10. Install the transmission covers.
11. Close and secure the rear door.
8.7.9 Extend Lockout Valve (10054 only)
Model 10054 has an extend lockout valve (5) which
prevents the boom from being extended beyond 42 feet
unless the outriggers are lowered onto firm terrain. Once
the outriggers are lowered, pressure switches located on
each outrigger cylinder close and energize the solenoid
on the boom extend lockout valve. The boom can then be
fully extended.
a. Extend Lockout 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 extend lockout
valve.
8. Remove the nut and bolt securing the extend lockout
valve to the frame. Remove the valve from the
machine.
9. Wipe up any hydraulic fluid spillage in, on, near and
around the machine, work area and tools.
b. Extend Lockout Valve Disassembly, Cleaning,
Inspection and Assembly
1. Secure the extend lockout valve assembly in a
suitable bench vise if possible. Remove the solenoid
nut, coil and cartridge (6) from the valve. Remove
the pressure sense valve (7) from the valve.
2. Clean all components with a suitable cleaner before
inspection.
3. Inspect the solenoid cartridge for proper operation.
Check by shifting the spool to ensure that it is MH6190
5
V1
T
C1
MH3792
6
7