9
6.3) ASSEMBLY:
Prior to assembly, ensure that:
• all the components are perfectly clean and in good con-
dition.
• the spare parts and the lubricant used are suitable
for the operating temperature of the actuator (see Air
Torque technical data sheets).
• Note: The lubricants suitable for the various operat-
ing temperatures (Standard, HT and LLT actuators) are
available in Air Torque.
Only for “standard” actuators, for temperature from
-40°C (-40°F) to +80°C (+176°F), it is possible to use
lubricant Dow Corning type Molykote
®
G-2003.
A) Drive shaft assembly (Part N° 60), figures 06, 07 and
07A:
• Install top (06) and
bottom (07) bearings,
grease and insert the
bottom (20) and top
(21) pinion o-rings onto
the shaft.
• Grease the outside sur-
face of the drive shaft
as shown in figure 06.
• Insert partially the drive
shaft (60) in the body
(50), install octi-cam
(01) in the correct posi-
tion as shown in figures
07 and 07A, related to the bottom and top of the drive
shaft and the rotation of the actuator when energised.
Install the internal thrust
bearing (08). Insert com-
pletely the drive shaft in
the body.
• Fit external thrust bearing
(08), thrust washer (10)
and then external spring
clip (18) using snap ring
pliers or screwdriver for
spiral rings.
B) Pistons assembly (Part N° 40), figures 08, 09, 10 and 11:
• Grease and install o-rings (16), piston back (05) and pis-
ton head (15) bearings.
• Grease the internal surface of the body (50) and the pis-
ton (40) rack teeth.
• Insert the female connection of the drive shaft (60) in a
properly fixed coupling.
• Ensure that the octi-cam is in the right position as shown
in figure 09.
• For standard rotation assembly type “ST” (clockwise
to close), rotate the body (50) about 40-45° clockwise
from top view, as shown in figure 10.
• Insert and press the two pistons (40) simultaneously
inside the body (50) until the pistons are engaged, then
rotate the body anticlockwise from top view until the
stroke is completed.
• Ensure that with pistons completely closed, the rota-
tion obtained referred to the axis of the body is about
over 0° for models PT050 N→PT800 (0,5° over 0° for
PT045) and that the dimension “A” on both sides is the
same as shown in figure 11.
GB
IMAT PT- E
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