The HSLG 2520-173R Rotary Limit Box Assembly is a genuine replacement part used in OSCO / Linear HSLG slide gate openers to accurately control open/close travel limits. It houses the limit switches, shaft, limit nuts, wiring harness and cover — all parts needed for proper limit operation.
This assembly is ideal for repair, maintenance, or refurbishment of gate systems using the HSLG series. It ensures gates stop precisely at their intended open and close positions, preventing over-travel and mechanical strain.
Disconnect all power to the gate operator before servicing.
Remove the existing limit box cover and pull out the limit shaft assembly.
Install the 2520-173R rotary limit box assembly in place of the original.
Reconnect wiring harnesses and ensure limit switches are oriented correctly (open vs close).
Adjust the limit nuts while coasting the gate manually to their proper open/close positions.
Replace cover and power up the system to verify limits.
If gate stops prematurely or overshoots, fine-tune the limit nuts slightly
Always disconnect power before opening or servicing the limit box.
Handle shaft and switches gently to avoid misalignment or damage.
Use the HSLG installation guide to follow the proper sequence for limit nut adjustment to prevent overshoot.
Periodically inspect the limit box for dust, debris, or wear.
Ensure that the detent plate is working so the limit nuts stay in place after adjustment.
Recommended for professional technicians familiar with gate opener limit systems.
