JLG 740AJ Operator Manual - Manual (Page 36)

SECTION 2 - USER RESPONSIBILITIES, MACHINE PREPARATION, AND INSPECTION
2-16 – JLG Lift – 3121295
2.4 OSCILLATING AXLE LOCKOUT TEST (IF
EQUIPPED)
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 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. Position DRIVE SPEED/TORQUE SELECT SWITCH to
SLOW.
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. Carefully activate SWING control lever and position
boom over RIGHT side of machine.
6. With boom over right side of machine, place DRIVE con-
trol lever to REVERSE and drive machine off of block
and ramp.
7. Have an assistant check to see that left front or right rear
wheel remains elevated in position off of ground.
8. 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 to activate DRIVE to
release cylinders.
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. Carefully activate SWING control lever and position
boom over left side of machine.
12. With boom over left side of machine, place DRIVE con-
trol lever to REVERSE and drive machine off of block
and ramp.
13. Have an assistant check to see that right front or left rear
wheel remains elevated in position off of ground.