JLG 600SC_660SJC Service Manual - Manual (Page 81)

SECTION 4 - CAT CHASSIS (PRIOR TO S/N 0300128000)
3121157 – JLG Lift – 4-19
5. Position two supports (1) of Tooling (A) in order to
support the recoil spring assembly. Make sure that
the two adjustable supports (1) are level.
6. Adjust the spacing between reaction plate (2) and
movable plate (3) so that the spacing is approxi-
mately the same length as the recoil spring assem-
bly.
NOTE: Do not remove the lifting device from the recoil
spring assembly until the unit is leveled, centered
and locked in Tooling (A).
NOTE: The recoil spring assembly may be installed in Tool-
ing (A) from the end. In this case, reaction plate (2)
must be removed. Then reinstall reaction plate (2)
after the recoil spring assembly is in place on two
adjustable supports (1).
7. The weight of the recoil spring assembly is approxi-
mately 53 kg (117 lb). Put the recoil spring assembly
in position on two adjustable supports (1) in Tooling
(A). Adjust adjustable supports (1) until the center-
line of the recoil spring assembly and the centerline
of Tooling (A) are aligned.
8. Put a level gauge (4) on the recoil spring assembly.
Reposition the recoil spring assembly until the recoil
spring assembly is level. Reposition the recoil spring
assembly until the retaining rod for the recoil spring
and the nut for the recoil spring assembly are cen-
tered in the hole in reaction plate (2). After the recoil
spring assembly is leveled and centered, install two
pins (5) on the back side of reaction plate (2), as
shown. Operate Tooling (B) enough to hold the
recoil spring assembly in position between reaction
plate (2) and movable plate (3). Make sure that the
recoil spring assembly is level and centered.
PERSONAL INJURY OR DEATH CAN RESULT FROM RECOIL
SPRING FORCE.
RECOIL SPRING FORCE, IF NOT RELIEVED, CAN RESULT IN PER-
SONAL INJURY OR DEATH.
R EL I EV E S P RI NG F ORC E BE F O R E R E M O V I NG T H R E A D E D
RETAINER, PERFORMING REPAIRS ON RECOIL SPRING HOUS-
ING, OR REMOVING RECOIL SPRING.
SEE SERVICE MANUAL FOR DISASSEMBLY INSTRUCTIONS.
MAXIMUM PRESSURE IS 20 700 KPA (3,000 PSI).
9. Close covers (6) on Tooling (A). Use Tooling (B) to
compress the recoil spring assembly slightly.
NOTE: The lifting device is removed for photographic pur-
poses.