JLG 600SC_660SJC Service Manual - Manual (Page 64)

SECTION 4 - CAT CHASSIS (PRIOR TO S/N 0300128000)
4-2 – JLG Lift – 3121157
NOTE: Be careful when you are working on the rubber toric
ring. Nicks, cuts or scratches may cause leaks.
3. Use towels or a mat (A) that is made of foam to aid
with installing the toric ring (2).
4. Install rubber toric ring (2) on seal ring (1) with instal-
lation tool (9). Lightly dampen the lower half of rub-
ber toric ring (2) with an appropriate lubricant. Refer
to Acceptable Lubricants for Assembly for additional
information. Use the following techniques in order to
dampen the rubber toric ring:
a. Wipe the seal with a lint free cloth.
b. Place towels or a mat that is made of foam at the
bottom of a container. Soak the towels or the
mat with the lubricant. Dip the rubber toric seal
in the container.
NOTE: Periodically inspect the installation tool for damage.
If necessary, replace the installation tool.
5. Make sure that the lower half of rubber toric ring (2)
is still wet. Use installation tool (9) in order to posi-
tion seal ring (1) and rubber toric ring (2) squarely
against seal ring housing (5). Make sure that you
use sudden pressure and even pressure when you
press a toric ring that has a small diameter. Press
rubber toric ring (2) under housing retaining lip (3)
that is part of seal ring housing (5). Use the following
steps in order to install a rubber toric ring that has a
large diameter:
a. Push the rubber toric ring over the seal ring
retaining lip on one side.
b. Tap the installation tool with a rubber mallet on
the opposite side of the rubber toric ring. Tap
until the rubber toric ring is past the seal ring
retaining lip of the housing.
6. Use Tooling (A) to check the assembled height (B)
at four locations that are 90 degrees from each
other. The difference in height must not exceed 1.0
mm (0.04 inch). Refer to the illustration below.
Tooling (A)
(B) Assembled height
(10) Dial indicator
(11) Collet assembly
(12) Dial indicator base (plastic)
(13) Contact point