SkyTrak 8042 Service Manual - Manual (Page 524)

8.109 Model 8042, 10042, 10054 Legacy Rev. 10/03
Hydraulic System
c. Extend Lockout Valve Installation
1. Place the extend lockout valve (14) into position on
the mounting plate on the vehicle frame (15).
2. Install the carriage bolt (16) and the hex flange nut
(17) securing the extend lockout valve (14) to the
frame (15).
3. Use new oiled o-rings. Reattach and secure hoses,
fittings and wiring terminal.
4. Check the routing of all hoses, wiring, etc., for sharp
bends or interference with any rotating members,
and install tie wraps and/or protective conduit as
required. Tighten all fittings.
5. Start the engine and run at approximately 1/3-1/2
throttle for about one minute, without moving the
vehicle or operating any hydraulic functions.
6. 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.
7. Wipe up any hydraulic fluid spillage in, on, near and
around the vehicle, work area and tools.
d. Extend Lockout Valve Test
Conduct a test of the extend lockout valve.
1. Park the vehicle on a firm, level surface.
2. With the boom fully retracted and lowered, lower the
outriggers.
3. Extend the boom to 54 feet. The boom should
extend fully and should not stop at 42 feet.
MH3990
14
15
16
17
WARNING:
Avoid prolonged engine
operation in closed areas with inadequate
ventilation. Failure to properly ventilate exhaust
fumes can result in death or serious injury.
WARNING:
Hydraulic oil leaking under
pressure can penetrate the skin and cause
severe personal injury. DO NOT use your hand
or any part of your body to check for hydraulic
leaks. When checking for hydraulic leaks, wear
safety glasses and gloves to help provide
protection from spraying hydraulic oil. Use a
piece of cardboard or paper to search for leaks.