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2 – Instructions
MXP32N
Parts Sheet #8100-4101_08_MXP32Nps
CYLINDER DISASSEMBLY INSTRUCTIONS
Begin with a clean work area. Make sure all replacement parts are avail-
able and have no visual damage or defects. The following tools are recom-
mended for proper disassembly and assembly. (Exact wrench sizes and
materials will vary depending on cylinder size.)
•
Allen wrench set (std. and metric)
•
Small straight edge screwdriver
•
Socket wrench & socket set
•
Needle nose pliers
•
RheoGel TEK664 grease
•
Tin snips
For best actuator performance it is recommended that the following
instructions be read and followed carefully.
1. REMOVE BAND CYLINDER FROM MACHINERY
Remove all mounting hardware and air connections, if present, from
the Cylinder Heads (16) and/or Piston Bracket (5).
2. LOOSEN BANDS
Loosen Screw (18) from Cylinder Head (16) approx. 4 to 5 turns, but
do not remove the Screw. Tap the Screw into the Head to disengage
the Band Clamp (17). Repeat the process for the other Head.
3. REMOVE HEADS
Remove the four Head Screws (15) to free each Cylinder Head (16).
Remove each Head by rocking it up and down until the Head is free
from the Cylinder Tube.
DO NOT TWIST!
Remove the O-Ring (20)
from both Heads with a small screwdriver.
4. REMOVE DUST BAND
Remove End Caps (7) from both ends of the Piston Bracket (5) by
removing Screws (10). To remove the Dust Band (3), lift one end and
pull the Band through the Piston Bracket. The Band is magnetically
retained so some resistance will be present when removing.
5. REMOVE SEAL BAND
CAUTION:
Sealing Band edges are sharp. Grasp the top and bottom
of the Band when removing, not the edges.
Slide Piston Bracket (5) out of the Tube, then remove the Sealing
Band (4). Keep the Sealing Band available to assist in the reassembly
of the new Sealing Band. A 6-inch piece of Band is also included in
the repair kit for use during reassembly.
6. DISASSEMBLE PISTON BRACKET
Remove Wipers (8) from the Piston Bracket (5). With a small straight
edge screwdriver, remove the U-Cups (13) from both Pistons (6).
Remove the Cushion Seals (14) from the Piston. Remove the
Pistons (6) by inserting the screwdriver under the Piston side
tabs until the side retaining tabs are disengaged from the Piston
Bracket (5). With a small screwdriver, remove the Band Ramps (9) by
disengaging the side retaining tabs from the Piston Bracket. Keep the
Piston Bracket and Pistons separated for reassembly.
CYLINDER ASSEMBLY INSTRUCTIONS
1. CLEAN AND LUBRICATE
Thoroughly clean all components, particularly the Tube Bore, Tube
Slot and Bands. Thoroughly lubricate the bore of the Tube with a thin,
uniform layer of RheoGel TEK664 grease.
2. ASSEMBLY OF PISTON BRACKET
With the Piston Bracket (5) in hand, install the Band Ramps (9) so
the smaller ends are on the bottom. Install the Pistons (6) with the
ramp facing up. Slide the Piston onto the Piston Bracket. It should
snap easily into place. Install new lubricated U-Cups (13) (seal
lips facing out), and Cushion Seals (14) (small end facing out).
Slide new Wipers (8) into the groove on the Piston
Bracket (5), flat side of Wiper faces out, Wiper groove
on inside (see illustration). Trim to edge of Piston
Bracket (5) and flare Wiper (8) edges outward.
3. INSTALL INNER SEALING BAND
CAUTION:
Metal edges of Sealing Band are sharp. Exercise caution
to avoid injury to yourself while installing. Handle Sealing Band with
care. Do not damage edges while handling.
Insert Sealing Band (4) into Cylinder Tube (1) by laying
the Band out along the length of the actuator and
passing it sideways through slot in Tube. With flat side
facing up (ground side facing down), position the Band
so a Piston Bracket’s length of Band extends from the
Tube at one end.
4. INSTALL PISTON ASSEMBLY
Place generous amounts of grease around bore of Tube (1) on both
ends and fill indentations on both sides of Piston Bracket (5) with
grease. Using 6-inch length of Seal Band included with repair kit, or
a short length of the old Seal Band, slightly kink the Band upwards,
one inch (25mm) from the end. Insert into slot between the Band
Ramp (9) and Piston (6) on the Piston Bracket, and stop against
opposite side of the Piston. Feed the extended Sealing Band through
the opposite end of the Piston Bracket (5) and up the short length of
inserted Band. Once the Sealing Band is through the Piston Bracket,
remove the short length of Band material and discard.
Grasp the Piston Bracket while holding the Wipers in place with your
fingers. Flare the Wiper edges out while inserting the Piston Bracket
partway into the Tube. Do not force the Piston Bracket. Place a finger
over the opposite end of the Piston Bracket to keep the Wipers in
place, while pushing the remainder of Piston Bracket into the Tube.
If the Piston Assembly experiences resistance, use a small screw-
driver to press in on the ends of the Band Ramps where it contacts
the Tube (1). With the Piston Bracket in place, slide the length of the
greased Tube until the end of the Piston just extends out the Tube.
Wipe off the excess grease from the Piston end.
NOTE: If Tube and Piston Assembly were greased properly, excess
grease should be present as the Piston exits end of Tube. If this is not
the case, more grease will need to be added.
5. INSTALL ONE HEAD
CAUTION:
Twisting the Head during installation may cut the O-Rings
resulting in excessive leakage during operation.
Install new lubricated O-Rings (20) onto each Head (16). Position
the Sealing Band (4) leaving .775" (19.7 mm) of Band protruding
from the end of the Tube. Install Head into Tube holding Screw (18)
in place. Position the Sealing Band on the bottom side of the Band
Clamp (17). Use a slight up and down rocking motion (not side-to-
side or twisting) to insert the first Head into Tube. The Head should be
flush with the end of the Tube after installation.
Apply RheoGel TEK664 to threads of Head Screw (15) and install into
Head. Torque Screws to 70 – 80 in-lbs (8 - 9 N-m).
6. INSTALL DUST BAND
Slide Dust Band (3) through the upper slot of Piston
Bracket (5) and lay on top of the Cylinder Tube slot.
Bend the Dust Band downward at a slight angle (see
illustration), .775" (19.7mm) from the end of the Band.
Position the Dust Band on top of the Band Clamp (17).
Hold Screw (18) in while inserting the Dust Band into the first
Head (16). Tighten Screw (18). When completed pull the other end
of the Dust Band to make sure it is secured. Repeat the process if
necessary. Install End Caps (7) with Screws (10) onto Piston Bracket.
FLAT
SIDE
GROUND SIDE
FLAT SIDE
OF WIPER
FACES OUT
GROOVE
TO INSIDE
0.775
19.7 mm
