JLG 600SC_660SJC Service Manual - Manual (Page 78)

SECTION 4 - CAT CHASSIS (PRIOR TO S/N 0300128000)
4-16 – JLG Lift – 3121157
5. 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 at free length.
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).
6. The weight of the recoil spring assembly is approxi-
mately 53 kg (117 lb). Fasten a suitable lifting device
to the recoil spring assembly. Put the recoil spring
assembly in position on two adjustable supports (1)
in Tooling (A). Adjust two adjustable supports (1)
until the centerline of the recoil spring assembly and
the centerline of Tooling (A) are aligned.
7. 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.
NOTE: The lifting device is removed from the recoil spring
assembly for photographic purposes.