Stabil-trak, Electrical circuit operation and troubleshooting, Stabil-trak™ system – Lull 944E-42 Service Manual User Manual
Page 216
Stabil-TRAK™ System
10-4
944E-42
10.3
STABIL-TRAK™
ELECTRICAL CIRCUIT OPERATION AND TROUBLESHOOTING
Note: Before using the 944E Stabil-TRAK System
Troubleshooting chart and diagrams, complete the
Section 10.4, “Stabil-TRAK™
System Test”, to determine
what part of the system is not functioning properly.
Definitions:
PB = Park Brake
SB = Service Brake
DE = De-energized
E = Energized
C = Closed
O = Open
Stabil-TRAK™
System
Troubleshooting
FREE PIVOT
MODE
SLOW PIVOT
MODE
LOCKED
MODE I
LOCKED
MODE II
LOCKED
MODE III
Machine
Conditions
Switch/
Relay
Solenoid
Ignition On.
Boom Below 40°.
PB “OFF” &
SB Released.
Transmission
Fwd. or Rev.
Ignition On.
Boom Above 40°.
PB “OFF” &
SB Released.
Transmission
Fwd. or Rev.
Ignition On.
Boom Above 40°.
PB “ON” &
SB Released.
Transmission
Neutral.
Ignition On.
Boom Above 40°.
* PB “OFF” &
SB Applied.
Transmission
Fwd. or Rev.
Ignition On.
Boom Above 40°.
PB “OFF” &
SB Released.
Transmission
Neutral.
Solenoid 12A
E
DE
DE
DE
DE
Solenoid 12B
E
DE
DE
DE
DE
Solenoid 3
DE
DE
E
E
E
Solenoid 4A
DE
E
DE
DE
DE
Solenoid 4B
DE
E
DE
DE
DE
Boom Proximity Sensor
C
O
O
O
O
Boom Switch Relay (E7)
E
DE
DE
DE
DE
Stabilizer Lock Relay (E6)
DE
DE
E
E
E
Stabilizer Lock Mode Light
OFF (DE)
OFF (DE)
ON (E)
ON (E)
ON (E)
Stabilizer Slow Pivot Mode
Light
OFF (DE)
ON (E)
OFF (DE)
OFF (DE)
OFF (DE)
Neutral Start Relay (E3)
DE
DE
DE
DE
E
Park Brake Solenoid
E
E
DE
E
E
Park Brake Switch
O
O
C
O
O
Stabilizer Brake Switch
O
O
O
C
O
Transmission Control
Relay (E1)
DE
DE
E
DE
DE