JLG 600SC_660SJC Service Manual User Manual
Page 85
SECTION 4 - CAT CHASSIS (PRIOR TO S/N 0300128000)
3121157
– JLG Lift –
4-23
2.
Replace O-ring seals (7) and (10) with new O-ring
seals. Install O-ring seals (7) and (10).
3.
Install fill valve (13) and relief valve (2) to piston
assembly (1). Do not tighten fill valve (13) and relief
valve (2).
4.
Position plate assembly (6) and plate (5) and install
bolts (4) on piston assembly (1).
NOTE: Install lip seal (3) with the lip toward the outside.
5.
Apply Tooling (B) in the groove for lip seal (3). Use
Tooling (A) to install lip seal (3). Install lip seal (3) to
Dimension (D). Dimension (D) equals 0.5 ± 0.5 mm
(0.02 ± 0.02 inch).
6.
Put a small amount of Tooling (B) on the sliding sur-
face of piston (1). Put a minimum of 60 cc (4 in3) of
Tooling (B) on the end of piston (1). This will prevent
air from displacing grease in the cylinder during the
installation of the piston. Make sure that the grease
covers the backup rings and the O-ring seals.
7.
Center piston (1) in the cylinder. Insert piston (1) into
the cylinder.
NOTE: It may be necessary to use a soft faced hammer to
install piston (1) into the cylinder.
8.
Tighten fill valve (13) to a torque of 34 ± 5 Nm (25 ±
4 lb ft).
9.
Fill the cavity of the piston with Tooling (B).
10.
Make sure that all of the passages in the piston are
filled with Tooling (B). Make sure that air is not
trapped in the passages in the piston.
11.
Tighten relief valve (2) to a torque of 34 ± 5 Nm (25
± 4 lb ft).
End By:
a. a. Install the front idler and the recoil springs.