Power Jacks C-Series - Manual (Page 13)

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4
Installation
4.4.11 Drive Motor
4.4.11.1 Power Jacks recommend that when you purchase a screw jack requiring a motor mounted
directly to the screw jack this is purchased as a complete item from Power Jacks. The motor is
then pre-assembled to the screw jack. If you have opted to fit a motor yourself below is a typical
procedure for common motor types.
4.4.11.2 Before mounting the drive motor, check the direction of rotation of the screw jack drive shafts
relative to the linear motion of its lead screw. Also check the operation of any limit switches
fitted to the unit.
4.4.11.3 Place the motor into the mounting position next to the screw jack.
4.4.11.4 Connect the motor to the power source and switch on the motor. Check the direction of rotation,
in association with the safety limit switches (if necessary, change the direction of the motor
shaft rotation).
4.4.11.5 Attach the motor adapter flange to the shell / body of the screw jack, using 4 set screws.
4.4.11.6 Typically a flexible coupling with elastomeric element is used to connect the two drive shafts.
4.4.11.7 Attach one hub of the coupling half to the worm shaft of the screw jack.
4.4.11.8 Push the elastomeric element (spider insert) onto the coupling hub now on the screw jack.
4.4.11.9 Mount the second coupling hub onto the drive shaft of the motor.
4.4.11.10 Attach the motor to the motor adapter flange using 4 screws. Remember to radially orientate
the motor to the correct position for your application.
4.4.12 Limit Switches – Fitted To Cover Pipe
4.4.12.1 Power Jacks recommend that when you purchase a screw jack requiring limit switches mounted
directly to the screw jack this is purchased as a complete item from Power Jacks. The limit
switches are then pre-assembled to the screw jack provided suitable to transport. However
always reset and check limit switch operation when installing the screw jack. The following
procedure is for limit switches fitted to the cover pipe of the screw jack with an adjustable clamp
ring.
4.4.12.2 Detach the corresponding clamping ring on the cover pipe by loosening the mounting bolt.
4.4.12.3 Move the limit switch into the desired position.
4.4.12.4 Clamp the ring by tightening the mounting bolt.
4.4.12.5 Check the position of the limit switch by turning the screw manually and checking that the
switches triggers at the desired screw jack stroke position.
4.4.12.6 If necessary, repeat the procedure.