Service Manual User Manual

Hydraulic System
9-109
Figure 9– 72. Swing carriage cylinder (optional).
Swing Carriage Cylinder Legend
1. Swing Carriage Cylinder (OPTIONAL)
(includes items 2 through 14)
2. Cylinder Tube
3. Wear Ring
4. Piston Seal
5. Piston
6. O-Ring
7. Backup Ring
8. Gland
9. Rod Seal
10. Wiper
11. Rod
12. Counterbalance Cartridge Valve - Preset to 3000 psi
(207 bar)
13. Direct-acting Relief Valve, Preset to 2000 psi
(138 bar)
14. Orifice, 0.038” diameter
KITS
15. Swing Carriage Cylinder Seal Kit
(includes items 3, 4, 6, 7, 9, & 10)
16. Valve Seal Kit for item 12
(includes three O-Rings and three Backup Rings)
17. Valve Seal Kit for item 1 (includes two O-Rings, one Backup
Ring and one Gland Ring)
b. Swing Carriage Cylinder Disassembly
Note: An additional O-ring may be included at the base
of the cylinder rod. This additional O-ring may be
discarded, as it served only in a temporarily protective
role to keep paint off the rod while the cylinder was
painted at the factory.
1. Clean the swing carriage cylinder (1, Fig. 9– 72) with
a suitable cleaner to remove dirt, debris, grease, etc.
2. Place the swing carriage cylinder in a soft-jawed vise
or other acceptable holding equipment if possible.
DO NOT damage the tube.
Note: Significant pressure may be trapped inside the
cylinder. Exercise caution when removing the counter-
balance valve (12) and direct-acting relief valve (13).
3. Remove the 3000-psi (207-bar) counterbalance
cartridge (12), 2000-psi (138-bar) direct-acting relief
valve (13) and the 0.038" diameter orifice (14) from
the swing carriage cylinder. Also remove the O-rings
and backup rings from the valves.
4. Extend the rod (11) to access the cylinder base.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
To r q u e
to
250 lb/ft.
(339 Nm)
Apply
Loctite
#271 to
Inside
Threads
Torque to 30-35 lb/ft.
(40,7-47,5 Nm)
Retract
Port
“X”
Port
Extend
Port
PF0760
PH0441
Model 3606 • Origin 10/99