JLG 600SC_660SJC Service Manual - Manual (Page 65)

SECTION 4 - CAT CHASSIS (PRIOR TO S/N 0300128000)
3121157 – JLG Lift – 4-3
7. Do not adjust the seal ring (1) by pushing on the
seal ring or by pulling on the seal ring. Use installa-
tion tool (9) in order to push down on the seal.
8. Rubber toric ring (2) may twist during installation if
the seal is not completely wet or if there are burrs or
fins on housing retaining lip (3) that is part of seal
ring housing (5). Misalignments, twists and bulges
of the rubber toric ring will cause Duo-Cone Seal fail-
ures. If correct installation is not obvious, remove the
toric ring from the housing and repeat the installa-
tion procedure.
9. Wipe seal ring face (6) that is part of seal rings (1) by
using a lint free cloth. No particles of any kind are
permissible on the sealing surfaces. A small piece of
paper from a paper towel can force apart the seal
ring face, which will cause a leak.
NOTE: Rubber toric ring (2) must never slip on the ramps of
seal ring (1) or the ramps of seal ring housing (5). In
order to prevent slippage, allow adequate time for
evaporation of the lubricant before proceeding with
the procedure. Once the rubber toric ring is correctly
positioned, the rubber toric ring must roll only on the
ramps.
10. Apply a thin film of clean oil on the entire seal ring
face of one or both seals. Use a lint free cloth or
brush in order to distribute the oil evenly. Be careful
not to get any oil on the rubber toric rings. Lubricate
the seal faces by using the same oil that was used
during assembly. Dye may have been used in the oil
that was used during assembly. Use the same kind
of oil without dye in order to lubricate the seal faces.
Figure 4-2. Examples of incorrect assembly