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
Summary of Contents for BULLDOG 210-302
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