SkyTrak 6036 Service Manual - Manual (Page 328)

Hydraulic System
8.112 Model 6036 Legacy
Figure 8-73 Extend/Retract Cylinder Components
e. Extend/Retract Cylinder Assembly
Note: Follow Section 8.13.3, “General Cylinder
Assembly Instructions.”
1. Install a new small oiled o-ring (Fig. 8-73, 18), new
back-up ring (16), oiled o-ring (17) and another back-
up ring (16) into the piston (8).
2. Install the square ring (Fig. 8-73, 15), the piston seal
(14) and both precision wearbands (13) onto the
piston (8).
3. Install the precision wearbands (Fig. 8-73, 22) and
the buffer seal (29), if used, into the front end of the
head gland (7). Orientate the buffer seal as shown
(30). At the rear of the head gland, install the U-cup
seal (25) orienting the edge (27). Install the sealed
outside diameter heavy-duty rod wiper (24). The
wiper lip (28) should be toward the outer end of the
head gland and the seal lips toward the inner end of
the head gland. Use tools that will not damage the
seals. Install the square ring (23).
4. Install a new oiled o-ring (Fig. 8-73, 21), back-up ring
(20) and oiled o-ring (19) onto the head gland (7).
5. Fasten the rear of the rod 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.
6. Carefully slide the head gland (Fig. 8-73, 7), then
the rod spacer (12) onto the rod (6).
7. Carefully slide the piston (Fig. 8 -73, 8) onto the
rod spacer (12) and rod (6). Apply Loctite
Threadlocker #241 to the piston and torque the
piston to 300-400 lb/ft (407-542 Nm).
8. Apply Loctite Threadlocker #241 to the setscrews
(Fig. 8-73, 10 and 11) and thread the first setscrew
(11) and then the second (10) into the piston (8).
Torque the setscrews to 155-165 lb/in (18-19 Nm).
9. Install new locking inserts (Fig. 8-73, 9) into the
holes in the head gland threads.
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.
10. Secure the extend/retract cylinder in a soft-jawed
vise or other acceptable holding equipment if
possible.
MA7090
1
2
3
4
5
6
7
8
9
10
11
12
18
19
20 16
17
21
Torque to
300-400 lb/ft
(407-542 Nm)
Apply Loctite
#241 to threads
and torque to
300-400 lb/ft
(407-542 Nm)
25
23
Apply Loctite #241 to
threads and torque to
155-165 lb/in (18-19 Nm)
22
24
28
27
Torque to
45-50 lb/ft
(61-68 Nm)
26
25
13
14
15
13
29
30