SkyTrak 6036 Service Manual - Manual (Page 272)

Stabil-TRAK™ System and Boom Interlock System
10-44 6036, 6042, 8042, 10042, 10054
10.12.4 Hydraulic Circuit Operation -
Outrigger Interlock Mode
Operation:
When the outriggers are lowered onto firm terrain,
pressure within the outrigger cylinders close the outrigger
pressure switches (1 and 2), energizing the boom extend
lockout solenoid valve (3).
As the boom extends past the boom extend switch, the
switch opens. The boom extend lockout solenoid
valve (3), remains energized by the circuit provided by
the outrigger pressure switches.
Pressurized oil flows to the base of the pilot-operated
valve (4), opening the valve and allowing oil to flow to the
extend/retract cylinder (5).
10.12.5 Hydraulic Troubleshooting - Outrigger Interlock Mode
Not
OK
Not
OK
Boom will not extend to its full limits. Conditions:
• Both outriggers lowered onto
firm terrain.
Note: When the outrigger
interlock mode is engaged, the
following systems are
automatically activated:
• Stabil-TRAK™ system is in
LOCKED MODE.
(Refer to Section 10.4,
“Stabil-TRAK™
Operation,”
for more information.)
• Transmission has
been DECLUTCHED.
• Park brake ENGAGED.
• Outrigger RAISE function has
been DISABLED. However, the
LOWER function is still active,
to allow for any changes in
outrigger footing.
Check solenoid coil from the boom
lockout valve for correct resistance
(7-9 ohms).
Remove solenoid cartridge from boom
lockout valve and inspect
for debris or damage.
Replace solenoid.
Clean passages or replace
cartridge.
If OK
If OK
If OK
Not
OK
Replace check valve(s).
Inspect check valves on
extend/retract cylinder.
Not
OK
Check outrigger pressure switches for
proper operation.
Replace switch(es).
If OK
Not
OK
Check electrical wiring.
Refer to Section 10.9,
“Stabil-TRAK™ Boom
Interlock Electrical Circuit
Operation and
Troubleshooting (10054),”