Oscillating Axle Option (Gs-90 Models) - Genie GS-3384 Service Manual

January 2013
9-3
Oscillating Axle Option
(GS-90 models)
How the
Oscillating Axle Functions
When driving the GS-90 with the platform in the
stowed position, the oscillating axle function
ensures that all four wheels maintain solid contact
with the ground, delivering the maximum traction
available.
When driving the GS-90 with the platform raised
above the down limit switch height, the oscillating
axle function is limited in that the oscillating
cylinders only respond to input from the oscillating
axle limit switches, located on the rear axle.
Oscillate Stowed Relay CR84
Terminal 30 of the Oscillate Stowed relay, CR84,
receives power from the Platform Down limit
switch, LS6. When the platform is raised above
LS6, power to terminal 30 will be cut.
Terminal 86 of CR84 is connected to pin J2-C5 at
the ECM. Pin J2-C5 is powered anytime the Brake
Release valve coil Y2 is energized, thus energizing
CR84 terminal 87 and, ultimately, all four oscillating
valve coils, allowing oil to pass between the
oscillating cylinders. J2-C5 continues to power
terminal 86 for 0.5 seconds after Y2 is de-
energized.
Oscillate Raised Relay CR85
Terminal 30 of the Oscillate Raised relay, CR85,
receives power from the Power relay, CR42. When
power is cut to terminal 86 of CR42 via key switch
or either Emergency Stop button, power to terminal
30 of CR85 will be lost.
Terminal 86 of CR85 receives power from pin J1-A4
while drivin is engaged and the ECM is powered.
J1-A4 is disabled when an outrigger is lowered to
the ground.
Part No. 84793
Oscillate Limit Switches LS22, LS23
The right and left oscillating limit switches, LS22
and LS23 respectively, are normally closed limit
switches, held in the open position when the
machine is on a level surface.
When the left rear or right rear wheel 'drops', the
limit switch will relax and close its circuit, sending
power to the appropriate oscillating valve coil.
FROM PLATFORM CONTROLS EMERGENCY STOP
CR42
POWER
86 30
85 87
CB2
20A
B1
+
-
GS-84 • GS-90
Section 4 • Repair Procedures
STEER AXLE COMPONENTS
LS6
PLAT
N.C.
DOWN
LIMIT
SWITCH
CR84 CR85
OSCILLATE OSCILLATE
STOWED RAISED
2 11
86 30 86 30
87A 85 87 87A 85 87 87A
N.C.H.O. N.C.H.O.
LS23 LS22
LEFT RIGHT
OSCILLATE OSCILLATE
LIMIT SWITCH LIMIT SWITCH
Y54 Y56
Y57
J2-C1/C3
J2-C5
J1-A4
U5
12
ELECTRONIC
CONTROL
MODULE
Y55 Y2
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