SkyTrak 6036 Service Manual - Manual (Page 182)

Hydraulic System
8-30 6036, 6042, 8042, 10042, 10054
2. Remove the solenoid valve assemblies (2) from the
outrigger valve by removing the four capscrews (3).
Discard the four o-rings.
3. Remove shuttle cartridges (4) from outrigger valve.
4. Clean all components with a suitable cleaner
before inspection.
5. Inspect the solenoid cartridges for proper operation.
Check by shifting the spool to ensure that it is
functioning properly. Check that the spring is intact.
Inspect the cartridge interior for contamination.
6. Inspect internal passageways of the outrigger
valve for wear, damage, etc. If inner surfaces of the
valve DO NOT display an ultra-smooth, polished
finish, or components are damaged in any way,
replace the valve or appropriate part. Often, dirty
hydraulic fluid causes failure of internal seals and
damage to the polished surfaces within the
secondary function manifold.
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.
7. Install the shuttle cartridges into the outrigger valve.
Torque to 35 lb-ft (48 Nm).
8. Attach the solenoid assemblies to the outrigger valve
using four new, oiled o-rings and the previously used
capscrews.
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.
8.7.10 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.
MH6190
5