Service Manual User Manual

Section 9
9-104
e. Frame Tilt or Stabilizer Cylinder Assembly
Note: Follow
Section 9.12 c. General Assembly Instruc-
tions
.
1. Install the deep Z-seal with rod backup (12,
Fig. 9– 68) into the head gland.
2. Install the precision wearband (11) into the head
gland.
3. Install the heavy-duty rod wiper (15) with the raised
portion of the lip seal oriented toward the rod eyelet
as shown.
Note: The wiper lip should be toward the outer end of
the gland and seal lips toward the inner end of the gland.
Use tools that will not damage the seals. If the backup
ring is not flat on both sides, the side with the arc must be
toward the O-ring.
4. Install the O-ring (10) onto the head gland (14).
5. Install the backup ring (9) onto the head gland (14).
6. Install the O-ring (8) onto the head gland (14).
7. Install the head gland (14) onto the rod (2). If
necessary, use a soft hammer to drive the head
gland onto the rod.
8. Install the small O-ring (7) into the piston (5).
9. Install the Type 730 capped T-seal (6) onto the piston
(5).
Note: The T-seal actually consists of four components; a
wide, flexible inner band, the flexible T-seal band itself,
and two supportive split caps that mount on either side of
the “T” seal band.
10. Install the two precision wearbands (4) onto the
piston (5).
11. Install the piston (5) onto the rod (2).
12. Secure the rod eyelet in a soft-jawed vise or other
suitable holding device. Place a padded support
below the threaded end of the rod to help prevent
damaging the rod.
13. Apply Loctite Primer “T” and Threadlocker #271
(red), to a new 1.50-12 NF nut (3) in accordance with
Loctite instructions. Install the nut onto the threaded
end of the rod. Torque the nut to 1100-1250 lb/ft
(1492-1695 Nm).
14. Fasten the tube (2) in a soft-jawed vise or other
suitable holding device. DO NOT damage the tube.
15. To aid in installation, lubricate the O-rings and the
inside of the tube, piston and head gland with clean,
filtered hydraulic oil.
IMPORTANT: Use a suitable installation tool or com-
pression sleeve to help prevent twisting or damaging the
seals and O-rings when installing the piston and head
gland into the cylinder. When sliding the rod and piston
assembly in the tube, DO NOT damage the piston by
scraping it against the threads in the tube. Keep the rod
in line with the tube to prevent binding.
16. Keep the rod weldment (16) straight and carefully
insert the rod weldment into the tube (2). Avoid
scratching, nicking or damaging the tube while
installing the rod.
17. Begin threading the head gland (14) into the tube (2).
Place the locking insert (13) in its hole in the head
gland threads just before the hole is threaded into the
tube. Use a suitable pin spanner wrench to thread the
head gland (14) completely into the tube (2). Torque
to 300-400 lb/ft (407-542 Nm).
18. Attach the dual pilot-operated check manifold to the
cylinder at the manifold block mounting boss with two
new O-rings, four SAE 3/8" washers, 3/8"
lockwashers and 3/8-16 x 3-3/4" hex-head
capscrews. In an alternating pattern, slowly tighten
the bolts securing the valve body to the cylinder.
Torque to 31 lb/ft (42 Nm).
19. Test the cylinder at low operating pressure (100 psi or
6,9 bar) to verify that the piston and rod move freely
in both directions.
20. Increase the operating pressure to the maximum for
the cylinder (4000 psi or 275 bar) and check for
external leakage and for free movement in both
directions.
21. Retract the piston fully and cap or plug the dual pilot-
operated check manifold ports.
Model 3606 • Origin 10/99