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Economair Cylinders

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WARNINGS:

Improper application, installation, service or maintenance of
ARO

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 cylinders may create a hazardous condition, which may in

turn cause bodily injury as well as shortened product life. Contact
The Aro Corporation for special applications.

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Economair cylinders are a series of round line repairable
cylinders designed for medium to heavy duty pneumatic
applications.

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The operating pressures are 200 p.s.i.g. - pneumatic and
200 p.s.i.g. - non-shock hydraulic with hydraulic packing
option.

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Economair cylinders are available in 6 bore sizes: 1-1/8”,
1-1/2”, 2”, 2-1/2”, 3” and 4”.

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Options include : 6 mounting styles, magnetic pistons,
cushioned and non-cushioned and numerous packing op-
tions.

24 and 28 series cylinders are cushioned models. Cushions are
protective devices used to extend cylinder life and should not be
used to decelerate loads.

Cushioning on all bores, except the 1-1/8”, are equiped with an
adjustable needle valve in the head and cap to provide adjust-
ment of the cushion effect - clockwise rotation increases cushion-
ing, counterclockwise rotation decreases cushioning. After ad-
justment, tighten retaining nut to lock into position. CAUTION: Do
not disengage cushion needle from head or cap while cylinder is
under pressure.

Pneumatic cylinders should be lubricated to provide maximum
cycle life. Economair cylinders are lubricated with Shell Darina,
EP grade, no. 2 grease during assembly at our factory in Angola,
Indiana. Factory lubrication will provide a satisfactory amount of
cycle life if no additional lubrication is provided. However, we rec-
ommend lubrication for any pneumatic system and suggest that
you follow the guidelines for types of lubricants which are outlined
in all of our catalogs (reference catalog 0020-M).

Periodic maintenance must be performed to assure maximum
product life. Disassembly for cleaning, inspection, and relubrica-
tion can be performed any time equipment is idle for a short period
of time. All metal parts should be cleaned with a non-flammable
solvent. All rubber parts should be thoroughly washed with soap

and water. Cleaned parts should be rinsed and dried with low
pressure air. Any parts which are worn or damaged should be re-
placed. Selected parts and seals are available in repair kit form.

Clamp head by nose or tang flats with port in a vertical position at
top of cylinder.

Remove all fittings, rotate barrel counterclockwise with a strap
wrench one full turn. Locking wire will feed out of slot during turn-
ing. At the completion of revolution, remove retaining wire, wiggle
barrel and slide from head.

Verify that all seals are in the correct position and that the rod and
piston seals have been properly lubricated with Shell Darina, Ep
grade no. 2 grease or equivalent.

Slide piston rod in head (be sure not to damage “U” cup in head),
then slide barrel over piston onto head. Avoid damaging piston
seals or head “O” ring. Clamp head by nose or tang on flats with
port in a vertical position.

Align port and hole in barrel; insert retaining wire tap in hole in
head in feed slot. Rotate barrel with strap wrench clockwise one
revolution, until port and hole align; retaining wire will feed as bar-
rel turns.

The assembled cylinder can now be tested for leaks and proper
operation.

1. Alternately apply 90 p.s.i.g. air pressure to each of the cylinder

ports and test for internal leaks across the piston and external
leaks at the barrel seals and the rod seals.

2. Test for proper cycling at 20 p.s.i.g. supply.