This UFP Surge Brake Actuator with BackUp Solenoid is designed for Single / Tandem Disc Brake Trailers up to 7500# GVWR. It fits a 2" Ball and has a capacity up to 7500# when used with an 8000# hitch ball. This actuator has a back-up solenoid that works in conjunction with the reverse light wire of the tow vehicle. While tow vehicle is in reverse, the solenoid is energized which does not allow fluid to the brake calipers, which allow the trailer to be backed-up. Some tow vehicles may need to be wired for this to operate as designed.
Note: This Actuator has the Upgraded Lock-Out Cap installed. This cap allow the trailer to back-up without the solenoid being energized.