SkyTrak 6036 Service Manual - Manual (Page 318)

Hydraulic System
8.102 Model 6036 Legacy
Figure 8-66 Attachment Tilt Cylinder Components
b. Attachment Tilt 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.
1. Clean the attachment tilt cylinder (Fig. 8-66, 1) with
a suitable cleaner before inspection. Remove all dirt,
debris and grease from the cylinder.
IMPORTANT: Avoid using excess force when clamping
the cylinder in a vise. Apply only enough force to hold the
cylinder securely. Excessive force can damage the
cylinder tube (Fig. 8-66, 2).
2. If necessary, remove the grease fitting (Fig. 8 -66, 3)
from the end of the rod (4).
3. Clamp the trunnion end of the attachment tilt
cylinder in a soft-jawed vise or in another acceptable
holding equipment if possible.
4. Slowly remove the 3000 psi (207 bar) counterbalance
valve (Fig. 8-66, 5) and the pilot-operated check
valve (6) from the attachment tilt cylinder.
5. Extend the rod (Fig. 8-66, 4) to allow access to the
base of the cylinder.
IMPORTANT: Protect the finish on the rod at all times.
Damage to the surface of the rod can cause seal failure.
6. Using a pin spanner wrench, unscrew the head
gland (Fig. 8-66, 7) from the tube (2). The head
gland was originally torqued to 300-400 lb/ft
(407-542 Nm), so a considerable amount of force is
required to remove it. Carefully slide the head gland
down along the rod toward the eyelet end, away from
the cylinder tube.
IMPORTANT: When sliding the rod and piston assembly
in the tube, prevent the threaded end of the tube from
damaging the piston (Fig. 8-66, 8). Keep the rod
centered within the tube to help prevent binding.
7. Carefully pull the rod (Fig. 8-66, 4) along with the
head gland (7) and all attachments straight out of the
tube (2).
8. Fasten the rod end in a soft-jawed vise and put a
padded support below and near the threaded end of
the rod to help prevent damage to the rod.
MA7100
6
1
2
9
8
16
19
10
15
11
12
13 14
7
18
4
5
21
17
Torque to
300-400 lb/ft
(407-542 Nm)
Apply Loctite #243 to
threads and torque to
200-300 lb/ft
(271-407 Nm)
Torque to
30-35 lb/ft
(41-47 Nm)
3
20
26
24
23
Apply Loctite #243 to
threads and torque to
155-175 lb/in
(18-20 Nm)
25
22
WARNING:
Significant pressure may be
trapped inside the cylinder. Exercise caution when
removing a counterbalance valve or a pilot-
operated check valve from a cylinder. Escaping
hydraulic fluid under pressure can penetrate
the skin, causing death or serious injury.