Oscillating axle lockout test, Oscillating axle lockout test -23 – JLG 1100S Service Manual User Manual
Page 65
SECTION 3 - CHASSIS & TURNTABLE
3121256
– JLG Lift –
3-23
Oscillating Axle Lockout Test
The front axles will oscillate when the boom is in the trans-
port position (i.e. when the boom is less than 15° above
horizontal and not extended beyond 24" [60.9 cm]) and
drive is selected.
LOCKOUT SYSTEM TEST MUST BE PERFORMED QUARTERLY,
ANY TIME A SYSTEM COMPONENT IS REPLACED, OR WHEN
IMPROPER SYSTEM OPERATION IS SUSPECTED.
NOTE: Ensure boom is fully retracted, lowered, and cen-
tered between drive wheels prior to beginning lock-
out 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
hydraulic 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.
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 care-
fully 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.
Activate drive and the lockout cylinders should
release.
15. If lockout cylinders do not function properly, have
qualified personnel correct the malfunction prior to
any further operation.