JLG 500RTS ANSI Operator Manual - Manual (Page 16)

SECTION 2 - PREPARATION AND INSPECTION
2-4 – JLG Sizzor – 3121100
2.6 LOCKOUT CYLINDER CHECK (IF
EQUIPPED)
To be performed quarterly, any time a system component
is replaced, or when improper system operation is sus-
pected on machines with oscillating axles.
NOTE: Ensure platform is fully lowered prior to beginning
lockout cylinder check.
1. Place a 8 in (20 cm) high block with ascension ramp
in front of the left front wheel.
2. Activate the machine’s hydraulic system from the
platform control station.
3. Place the engine speed and drive speed control
switches to their respective “LOW” positions.
4. Place the drive controller to the “FORWARD” posi-
tion and carefully drive the machine up the ascen-
sion ramp until the left front wheel is on top of the
block.
5. Raise the machine platform approximately 2 ft (61
cm); ensure the lockout cylinder cam valve is free of
the sizzor arm trip bar.
6. Place the drive controller to the “REVERSE” position
and carefully drive the machine off of the block and
ramp.
7. Have an assistant check to see that the left front
wheel remains locked in position off of the ground.
8. Lower the machine platform; the lockout cylinder
should then release the wheel and allow it to rest on
the ground.
9. If the lockout cylinder does not function properly,
have qualified personnel correct the malfunction
prior to any further operation.