Power Jacks E-Series - Machine - Manual (Page 14)

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Installation
4
4.4.13 Limit Switches – Rotary Cam Type (RLS)
4.4.13.1 Power Jacks recommend that when you purchase a screw jack requiring a Rotary cam type
Limit Switch (RLS) mounted directly to the screw jack this is purchased as a complete item from
Power Jacks. The RLS unit is then pre-assembled to the screw jack. If you have opted to fit a
RLS unit yourself below is a typical procedure for common RLS unit types. However always reset
and check limit switch operation when installing the screw jack.
4.4.13.2 Before mounting the RLS unit, check the direction of rotation of the screw jack drive shafts
relative to the linear motion of its lead screw.
4.4.13.3 Place the RLS unit into the mounting position next to the screw jack.
4.4.13.4 Remove the worm shaft end flange ensuring that the worm shaft seal is not damaged as this
must be reused (alternatively order spares).
4.4.13.5 Attach the RLS adapter flange to the shell / body of the screw jack, using 4 set screws.
4.4.13.6 Fit the worm shaft seal.
4.4.13.7 Typically a flexible beam coupling is used to connect the two drive shafts.
4.4.13.8 Attach the beam coupling to the worm shaft of the screw jack.
4.4.13.9 Attach the RLS unit to the adapter flange using 4 screws. Make sure that the drive shaft of the
RLS unit fully engages in the beam coupling. Tighten the clamp screw of the beam coupling.
Remember to radially orientate the RLS unit to the correct position for your application.
4.5 Regulations
The following regulations must be complied with:
• The relevant local regulations for the prevention of accidents.
• Generally recognized safety regulations.
• National regulations.