JLG 600SC_660SJC Service Manual - Manual (Page 130)

SECTION 6 - UNDERCARRIAGE
6-26 – JLG Lift – 3120898
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 the reaction plate
after the recoil spring assembly is in place on two
adjustable supports.
6. The weight of the recoil spring assembly is 117 lb.
(53 kg). Put the recoil spring assembly in position on
two adjustable supports (1) in tooling (A). Adjust the
two adjustable supports until the centerline of the
recoil spring assembly and the centerline of tooling
(A) are aligned.
NOTE: The lifting device is removed from the recoil spring
assembly for photographic purposes.
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.
PERSONAL INJURY OR DEATH CAN RESULT FROM RECOIL
SPRING FORCE.
RECOIL SPRING FORCE, IF NOT RELIEVED, CAN RESULT IN
PERSONAL INJURY OR DEATH.
RELIEVE SPRING FORCE BEFORE REMOVING THREADED
RETAINER, PERFORMING REPAIRS ON RECOIL SPRING HOUS-
ING, OR REMOVING RECOIL SPRING.
MAXIMUM RECOIL SPRING PRESSURE IS 3000 PSI (20,700 KPA).
8. Close covers (6) on tooling (A). Use tooling (B) to
compress the recoil spring assembly slightly.
9. Open the covers (6) on tooling (A). Measure dimen-
sion (X). The compressed length of dimension (X)
must be 18.03 ± 0.04 inch (458 ± 1 mm). If the com-
pressed length of dimension (X) is not correct, close
covers (6) on tooling (A) and adjust the length with
tooling (B). Adjust the length of dimension (X) until
the compressed length of dimension (X) is correct.
10. Apply a rust inhibitor to the threads of rod (12).
Install the washer and nut (8). Install nut (7). Tighten
nut (7) to a torque of 350 ± 37 ft. lbs. (470 ±50 Nm).