Replacing the V-belt
Unscrew the socket head screws and remove the cover with the entire speed control
mechanism.
Remove the V-belt.
Wrap the new V-belt around the open adjustable pulley and let it slip over the spring
loaded pulley. The V-belt can be easily attached if the adjustable pulley is opened.
Ensure that the adjustable pulley is opened carefully.
Replace the removed cover with the complete speed control mechanism and re-
assemble.
When positioning the top (adjustable pulley closed) speed limiting lock nut, ensure that
the adjustable pulley has a gap of 0.5-1.0mm to prevent damage to the pulley and motor
bearings.
The V-belt should not be in contact with the bottom of the adjustable pulley.
11 701PB Air motors
Installation
A silencer is installed on the air motor’s exhaust port. Install a moisture trap and filter in
the air line ahead of the motor. If condensates need to be flushed out of the motor, use
clean, dry air at low pressure. For efficiency of output and speed control, use air lines of the
same size or next pipe size larger than the intake port of the motor. A 4-way valve which
can be connected by piping to both air ports of the motor will make reversing possible. Use
a pressure regulator or a simple shut off valve to obtain desired power and conserve air to
regulate speed and torque.
The air motor is designed for air only. Do not allow corrosive, flammable
or explosive gases or particulate material to enter the motor. Water
vapour, oil-based contaminants, or other liquids must be filtered out. The
recommended air pressure should not exceed 7 bar (100 PSIG)
maximum.
Always disconnect the air supply before servicing.
Ensure that the air motor is correctly installed and lubricated in
accordance with the guidelines in this operating instruction. Each air
motor is fitted with an outlet port restrictor to stop the motor running
faster than the maximum designated speed. Failure to observe correct
installation and lubrication procedures with air motors will cause damage
that will invalidate your warranty.
Page 10 of 25
Watson-Marlow Bredel E-Manuals
14/12/2009
file://M:\staging\pdfs-global\m-701baseplate-gb-02.htm