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PNEUMATIC CYLINDER R434005343
ADJUSTMENTS
No adjustments are required after the cylinder is
installed and properly aligned.
MAINTENANCE
It is recommended that this cylinder be completely
disassembled approximately every five years for
cleaning, inspection, and replacement of all rubber
parts. The first examination on this particular appli-
cation will determine if the period between service
should be extended or shortened.
DISASSEMBLY
– Use care not to destroy or
scratch any parts during this procedure.
1. Remove the rod eye (14) from the piston rod
(12).
2. With the cylinder lying horizontal on the floor,
loosen and remove the four stop nuts (19).
3. Using a mallet, tap the cap (1) away from the
tube (2) and remove the tube seal “O” ring
(10).
4. Hold the end of the piston rod (12) and using
the mallet, tap the head (3) carefully away from
the tube (2) just far enough to allow your hand
to reach between the head and tube to grab
and support the piston rod. Now continue to
tap the head off of the rod.
5. Pull the piston rod upright to a vertical position
and then pull the tube (2) off of the piston rod
assembly.
6. Clamp the piston rod in a vise, protecting the
rod’s surface, and remove the piston (13) from
the piston rod (12) by loosening the threaded
joint (via spanner wrench) and slide the piston
off of the rod.
7. Remove the piston “O” ring (11), two piston
seals (7), back-up rings (8) and wear strip (9) .
8. Remove from the head (3) the tube seal “O”
ring (10), the rod wiper (4) and the rod seal (5)
and back-up ring (6).
CLEANING & INSPECTION
1. Clean all metal parts with a non-flammable sol-
vent and wash all elastomer or rubber parts
with soap and water. Rinse everything thor-
oughly and blow them dry with a low pressure
air jet.
2. Inspect all parts and throw away all those that
are to be replaced due to damage, wear or
age. Give particular attention to the recom-
mended replacement parts as indicated on the
parts list.
REASSEMBLY
– Use the exploded view as a
guide and lubricate all seals and grooves with
Shell Oil Company’s Aeroshell Grease 14.
1. Assemble the rod seal (5) into the head (3),
making sure the concave side of the seal faces
the inside of the cylinder. Place back-up ring
(6) against the flat face of the seal.
2. Install the rod wiper (4) in the head (3) with the
sharp edge facing the outside.
3. Clamp the piston rod (12) in a vise, install the
piston “O” ring (11) and slide the piston (13)
onto the rod. Fasten the piston into place using
a torque wrench and tighten to 250 ft-lbs using
Loctite 277.
4. Install piston seals (7) onto the piston (13) with
the flat side of the seals facing the middle of
the piston. Place back-up rings (8) against the
flat side of the piston seals (7). Install wear
strip (9) onto the piston (13).
5. Set the piston rod assembly on end, protecting
the rod’s surface. Slide the head (3) down over
the piston rod (12), being careful not to cut or
damage the wiper (4) or rod seal (5).
6. Lay the piston rod over towards its side and
push it through the head until the piston is
about four inches from the head.
7. Set the tube (2) on end and wipe some grease
on the inside at the very top.
8. Insert the tube seal “O” rings (10) into the head
(3) and the cap (1).
9. Fit the greased end of the tube on to the pis-
ton. Carefully run a screwdriver around the first
seal to assist the entry into the tube. Push the
tube forward until it enters the groove in the
head (3).
10. Install the cap (1) onto the tube, sliding the tie
rods through the holes of the cap.
11. Replace the stop nuts (19) onto the tie rods (17
& 18) and using a torque wrench, alternately
torque on opposite sides to 40 ft-lbs. DO NOT
tighten one side first.
12. Torque rod eye onto the piston rod (12) to 200
ft-lbs using Loctite 277 until it shoulders.
13. The reassembly is complete, therefore test the
cylinder for correct operation and any evidence
of leakage. DO NOT exceed 150 PSIG air
pressure.
