|
Item
No. |
Description |
Item
No. |
Description |
|
1 ** |
Wiper |
18 |
Retainer Cap |
|
2 |
Rod Bearing |
19 |
Retainer Ring |
|
3 |
Bushing Screws
(4) |
20 * |
Piston Rod |
|
4 ** |
Rod Seal |
21 |
Rod Bushing |
|
5 ** |
O-Ring |
22 |
Tie Rod Nuts (4) |
|
6 a |
Cylinder Tube
Seal |
23 |
Lock Washers (4) |
|
7 |
Cylinder Tube |
24 |
Front Head |
|
8 |
Front Cushion
Assembly |
25 |
Tie Rod (4) |
|
9 |
Front spring
Retainer |
26 |
Retainer Ring |
|
10 * |
Piston |
27 * |
Piston O-Ring |
|
11 a |
Piston U-Cup |
28 * |
Piston Retainer |
|
12 a |
Piston Bearing
Strip |
29 |
Cushion Guide |
|
13 a |
Piston Seal |
30 |
Cushion Screw
Seal |
|
14 * |
Piston Nut |
31 |
Cushion Screw |
|
15 |
Rear Cushion
Assembly |
32 |
Cushion Nut |
|
16 a |
Cylinder Tube
Seal |
33 |
Washer |
|
17 |
Rear Head |
34 |
Thrust Washer |
* Available as
factory assembled only
** Available as rod seal kit only.
a Available as piston seal kit
only |
NOTE:
Cylinder life is directly dependent on proper
installation and air preparation.
Cylinders are not structural units and they are
designed only to push and pull. The piston rod must
be properly aligned with the mating part in both the
extended and retracted position. Any misalignment
will cause interference and shorten the cylinder
life.
Air
lines must be free of all contamination. An air line
filter should be used. The air supply must be clean
and free of moisture. Proper lubrication is also
recommended.
When
rebuilding cylinders, make sure all parts are clean
before reassembly and avoid introducing any dirt or
chips into the cylinder. Check the piston rod (17)
and the cylinder tube (7) for damage and
replace either if necessary before proceeding.
Pre-lubrication of all seals prior to re-assembly is
recommended for ease of installation.
To Replace
the Rod Seals
5/8"
Diameter Rods
Remove any rod clevis or jam nut from the piston rod
end(20). Remove the bushing screws (3),
and slide the bushing (21) over the piston
rod. Insert a new U-cup (4), bearing (2),
and wiper (1) into a new bushing (21).
Install
the new bushing assembly over the piston rod, taking
care in passing it over the threaded part of the
piston rod. Install new bushing screws and tighten
firmly.
1"
and Larger Diameter Rods
Disassemble as above, except remove the U-cup (4)
from the front head. Install a new U-cup over the
rod, taking care in passing it over the threaded
part of the rod. Install new bushing screws and
tighten firmly
To Replace
the Piston Seals
Remove the
front head (24) by unscrewing four tie rod
nuts (22), removing the lock washers (23) and lifting the front head off the
cylinder tube (7). Remove the piston
rod/cylinder tube assembly from the rear head (17)
and pull the piston rod assembly from the tube (7). Remove the piston U-cups (11
& 13), and the piston bearing strip (12).
IMPORTANT: Install new U-cups,
making sure that the lips of the seals face away
from each other.
Use
grease to hold the new bearing strip (12) in place, and
insert the piston rod assembly back into the
cylinder tube.
NOTE:
It may be necessary to temporarily compress the
first piston U-cup to allow it to enter the tube.
Make sure the bearing strip is not pinched
between the tube and piston.
Install
new cylinder tube seals (6) into the
heads, and reinstall the cylinder tube. This is best
done in the vertical position, with the blind end
cover down. Make sure the tie rod nuts (22)
and lockwashers (23) are installed on
the short threaded end of the tie rods. Retighten the tie
rods using equal torque on each rod per the chart
below.
|
Bore Size |
Torque |
|
1", 1 1/2" |
8-10
ft.lbs. |
|
2", 2 1/2", 3 1/4" |
15-19 ft.lbs. |
|
4", 5" |
22-25 ft.lbs. |
|
6", 8" |
70-75 ft.lbs |
