PMAC Air Compressor
Powerex
•
100 Mundy Memorial Drive
•
Mt. Juliet, TN 37122
•
USA
P 1.888.769.7979
•
F 513.367.3125
•
www.powerexinc.com
IN598601AV
•
01/2020
Page 9 of 12
Lock out and tag out electric power. Vent all air
pressure from the system and lock out and tag.
DO NOT LOOSEN THE SET SCREW THAT SECURES
THE DRIVE HUB TO THE MOTOR SHAFT.
Pump replacement is not feasible for technical
reasons. If a pump experiences catastrophic failure
or reaches the end of its useful life replace the compelete compressor
assembly.
Motor Replacement
1.
Remove the electric connections from the motor.
2. Remove coupling guard. Loosen the screws that secure the
coupling rubber element radially to the drive hubs.
3.
Loosen the hex head screws that hold motor adapter plate 1 to
motor adapter plate 2 (see image below). Support the body of
the motor so it can be pulled straight back. The drive coupling
hub will come free with the motor.
4.
Remove motor adapter plate 1 from the motor by removing
the 4 hex head screws that secure the motor to the adapter
plate.
5.
If the motor is being replaced, measure the position of the
motor slide drive hub relative to the existing motor shaft.
Loosen the setscrew and place the hub on the new motor and
position the new hub in the same location on the new motor.
Make sure the key is in place. Tighten the set screw to 7.5 ft-lbs
with Blue 242 Loctite.
6.
Installation is the reverse of removal. Be sure the key is in place
on the motor shaft and that the 4 alignment pins are in place
in the adapter plates.
7. Install and tighten the screws to secure the rubber element to
the motor drive hub.
8. Replace the coupling guard.
9.
Reconnect the electric power and verify proper rotation before
running the compressor more than a few seconds.
DO NOT LOOSEN THE HEXHEAD SCREW THAT
SECURES THE ADAPTING PLATE TO THE FACEPLATE.
Do not lose the 4 alignment pins installed in the
two motor adapter plates. These pins are required
to maintain alignment between the motor and the pump.
