Oscillating Axle Lockout Test - JLG 450A Operation And Safety Manual

SECTION 2 - USER RESPONSIBILITIES, MACHINE PREPARATION, AND INSPECTION
2.3

OSCILLATING AXLE LOCKOUT TEST

LOCKOUT SYSTEM TEST MUST BE PERFORMED QUARTERLY, ANY TIME A SYSTEM COM-
PONENT IS REPLACED, OR WHEN IMPROPER SYSTEM OPERATION IS SUSPECTED.
NOTE: Ensure boom is fully retracted, lowered, and centered between
rear wheels prior to beginning lockout cylinder test.
1. Place a 6 inches (15.2 cm) high block with ascension ramp in
front of left front wheel.
2. From platform control console, start engine.
3. Place the Drive control lever to the 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 or raise the main boom enough
to get it out of the transport position.
2-10
5. Place Drive control lever to Reverse and drive machine off of
block and ramp.
6. Have an assistant check to see that left front or right rear
wheel remains elevated in position off of ground.
7. Carefully return boom to stowed position (centered
between rear wheels if swung or fully lowered if raised).
When boom reaches stowed position, lockout cylinders
should release and allow wheel to rest on ground, it may be
necessary to activate Drive to release cylinders.
8. Place the 6 inches (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. Repeat steps 4 thru 7 to check the opposite side of the oscil-
lating axle.
11. If lockout cylinders do not function properly, have qualified
personnel correct the malfunction prior to any further oper-
ation.
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