JLG 600SC_660SJC Service Manual - Manual (Page 122)

SECTION 6 - UNDERCARRIAGE
6-18 – JLG Lift – 3120898
6.4 FRONT IDLER AND RECOIL SPRING
Removal
1. Fasten a suitable lifting device to front idler (1), as
shown. Slide front idler (1) out of the undercarriage
frame as a unit. The weight of the unit is approxi-
mately 265 lb. (120 kg).
2. Remove four bolts (2) that hold front idler (1) to the
front support for recoil spring (3). Separate front
idler (1) from recoil spring (3). The weight of the front
idler is approximately 150 lb. (67 kg). The weight of
the recoil spring is approximately 120 lb. (53 kg).
Installation
NOTE: Make sure the mating surfaces of the front idler and
the mating surfaces of the recoil spring are clean
and free of dirt and debris prior to reassembly. Make
sure the two bearings for the front idler are clean and
free of dirt and debris prior to reassembly.
1. Position recoil spring (3) and front idler (1) together.
Temporarily install four bolts (2).
2. Fasten a suitable lifting device to the front idler and
to the recoil spring. Slide the front idler and the
recoil spring partially into the undercarriage frame.
Make sure the bolts (2) are exposed. Remove the lift-
ing device from the unit. Tighten bolt (2).
3. Use a pry bar to slide the front idler and the recoil
spring into the undercarriage frame.