8 307-050
Operation
1. The
piston must be at the bottom of its stroke. Apply
low
pressure air to move the piston down.
2. Fasten
the restraining
bracket (32) to two of the three
tie rods (M), using the clamps (31), with the screws
(30)
and washers (29) loosely installed.
3. Turn
the piston tube stud (73) to align it with the slot
in
the bracket (32). Raise the bracket to 1/2 to 3/4 in.
(12–19
mm) from the top of the stud. Hold the brack
-
et and tighten the tie rod clamps securely
. See Fig 2.
CAUTION
Run
the motor for a couple of cycles at low air pres
-
sure to see that the piston tube or pump coupling
nut (N) do not hit the bracket (32)
4. Screw the electric control pressure switch or pneu-
matic count line tube from the control center (H) to
the
1/4 npt(f) fitting on the side of the motor shield.
01814
1/2
to 3/4”
(12–19 mm)
31
73
32
M
PISTON
IN DOWN
POSITION
N
30
29
Fig
2
5. To
change the stroke length
,
first be sure the motor
air
regulator (D) is closed.
Then open the master air
valve (A). Slowly open the air regulator
until the mo
-
tor starts. Then loosen the locking knob (19) of the
stroke
adjustor (3), and turn the
adjusting knob (20)
counterclockwise
to
shorten the stroke. Now tighten
the
locking knob (19). See Fig 3.
NOTE: The air motor is factory set for the full stroke
length
of 4.25 in. (106 mm) or 480 on the adjuster
indicator (12). The shortest possible stroke
length
is 1.5625 in. (39.5 mm).
6. Record the number shown on the indicator (12). If
you change this setting, and at a later date want to
repeat
this setting, return the indicator to that setting.
If
the pressure
and fluid temperature are the same as
before, the amount of fluid dispensed will be the
same
within one percent.
01815
Fig 3
Turn
adjusting knob (20)
counterclockwise
to shorten stroke
12
20
19
3
1
1
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