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SECTION 3 - CHASSIS & TURNTABLE
3121171
3-15
Oscillating Axle Lockout Test
The front axles will oscillate when the boom is in the transport
position.
NOTE:
The machine is in transport mode until one of the follow-
ing three factors are exceeded:
Main boom extended more than 4 ft. (1.2 m)
OR
Main boom 6° above horizontal (w/tower stowed
OR
Tower above horizontal.
LOCKOUT SYSTEM TEST MUST BE PERFORMED QUARTERLY, ANY TIME A SYS-
TEM COMPONENT IS REPLACED, OR WHEN IMPROPER SYSTEM OPERATION IS
SUSPECTED.
NOTE:
Ensure booms are fully retracted, lowered, and centered
between drive wheels prior to beginning lockout cylinder
test. The axles must also be fully extended.
1.
Place a 6 inch (15.2 cm) high block with ascension ramp
in front of left front wheel.
2.
From platform control station, activate machine hydrau-
lic system.
3.
Place FUNCTION SPEED CONTROL and DRIVE SPEED/
TORQUE SELECT control switches to their respective
LOW positions.
4.
Place DRIVE control lever to FORWARD position and
carefully drive machine up ascension ramp until left
front wheel is on top of block.
5.
Telescope boom out of transport position.
6.
Drive machine off of block and ramp back on level sur-
face.
7.
Have an assistant check left front wheel remains locked
in position off ground.
8.
Retract boom back in to transport position. Activate
drive and the lockout cylinders should release.
9.
Place the 6 inch (15.2 cm) high block with ascension
ramp in front of right front wheel.
10.
Place DRIVE control lever to FORWARD and carefully
drive machine up ascension ramp until right front wheel
is on top of block.
11.
Telescope the boom out of the transport position.
12.
Drive machine off of block and ramp back onto the level
surface.
13.
Have an assistant check to see that right front wheel
remains locked in position off of ground.
14.
Retract the boom back in to the transport position. Acti-
vate drive and the lockout cylinders should release.
15.
If lockout cylinders do not function properly, have quali-
fied personnel correct the malfunction prior to any fur-
ther operation.
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