JLG 660SJ Operator Manual - Manual (Page 111)

SECTION 6 - GENERAL SPECIFICATIONS & OPERATOR MAINTENANCE
3121297 – JLG Lift – 6-25
6.5 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 inches (15.2 cm) high block with ascension
ramp in front of left front wheel.
2. From platform control station, 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.
5. With boom over right side of machine, place Drive con-
trol 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 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. With boom over left side of machine, place Drive control
lever to Reverse and drive machine off of block and
ramp.
11. Have an assistant check to see that right front wheel
remains locked in position off of ground.
12. 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.