Oscillating Axle Lockout Test - JLG H340AJ Service And Maintenance Manual

3.4 OSCILLATING AXLE LOCKOUT TEST

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.
1. Place a 6 inch (15.2 cm) high block with ascension ramp
in front of left front wheel.
2. From platform control station, start engine.
3. Place DRIVE control lever to FORWARD position and
carefully drive machine up ascension ramp until left
front wheel is on top of block.
4. Carefully activate SWING control lever and position
boom over right side of machine.
5. With boom over right side of machine, place DRIVE
control lever to REVERSE and drive machine off of block
and ramp.
6. Have an assistant check to see that left front wheel
remains locked in position off of ground.
7. Carefully activate SWING control lever and return boom
to stowed position (centered between drive wheels).
When boom reaches center, stowed position, lockout
cylinders should release and allow wheel to rest on
ground, it may be necessary activate DRIVE to release
cylinders.
8. Place the 6 inch (15.2 cm) high block with ascension
ramp in front of right front wheel.
9. Place DRIVE control lever to FORWARD and carefully
drive machine up ascension ramp until right front wheel
is on top of block.
10. Carefully activate SWING control lever and position
boom over left side of machine.
11. With boom over left side of machine, place DRIVE con-
trol lever to REVERSE and drive machine off of block and
ramp.
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SECTION 3 - CHASSIS & TURNTABLE
12. Have an assistant check to see that right front wheel
remains locked in position off of ground.
13. Carefully activate SWING control lever and return boom
to stowed position (centered between drive wheels).
When boom reaches center, stowed position, lockout
cylinders should release and allow wheel to rest on
ground, it may be necessary activate DRIVE to release
cylinders.
14. If lockout cylinders do not function properly, have
trained personnel correct the malfunction prior to any
further operation.
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