Oscillating axle lockout test, Oscillating axle lockout test -15 – JLG 1350SJP Service Manual User Manual
Page 61
SECTION 3 - CHASSIS & TURNTABLE
3121142
– JLG Lift –
3-15
Oscillating Axle Lockout Test
The front axles will oscillate when the boom is in the transport
position (i.e. when the boom is less than 15° above horizontal
and not extended beyond 12" [30.4 cm] on the1350SJP or 24"
[60.9 cm] on the 1200SJP) and drive is selected.
LOCKOUT SYSTEM TEST MUST BE PERFORMED QUARTERLY, ANY TIME A SYS-
TEM COMPONENT IS REPLACED, OR WHEN IMPROPER SYSTEM OPERATION IS
SUSPECTED.
NOTE:
Ensure boom is 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 the boom out of the transport position.
6.
Drive machine off of block and ramp back onto the level
surface.
7.
Have an assistant check to see that left front wheel
remains locked in position off of ground.
8.
Retract the boom back in to the transport position. Acti-
vate 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.