operation
With the exterior signal light showing green the trailer is backed into position at the loading dock until contacting the dock bumpers. The inside light shows red until the dock attendant pushes a control button that activates the restraining hook. The exterior signal light immediately changes to red as the hook automatically advances through its cycle until the trailer is secured.
When the hook makes positive engagement with the trailers rear impact guard the inside light will turn to green, and the interlock system will allow operation of the dock leveler. In the event a secure engagement of the trailer does not occur, an alarm will alert the operator to the fault condition.
Alternate safety procedures are required and an override control when actuated will allow operation of the dock leveler. The hook will provide a restraining force in excess of 35,000 pounds and will automatically adjust with trailer float during loading and unloading operations assuring the trailer is restrained at all times.
When loading or unloading is completed the dock attendant stores the restraint by pushing the release button. The inside light immediately changes to red after the hook is fully retracted the outside light turns green signally it is safe for the trailer to leave.
construction
The large solid steel hook is constructed from 50,000 psi yield material and is painted bright yellow for high visibility. The hydraulic cylinder is constructed with high tensile micro-honed tubing, hard chrome plated rod, guide bearings, and high- pressure low-friction seals.
All hydraulic hoses are high-pressure SAE 00R2 with factory crimped fittings. The control panel includes a NEMA 12 rated dust tight enclosure with shielded push button controls, PLC solid-state controller, communication lights and operator instructions on the cover. All voltages are available
installation
The NORDOCK® PIT-HOOK™ Model PH-3000 vehicle restraint is factory assembled and tested before shipment. The restraint is mounted in the pit below the dock leveler and behind the building wall. The signs, control panel and optional components are installed in accordance to instructions contained in the installation and owner’s manual.
communication
Safety equipment includes red and green inside and outside lights with operating instructions for the dock attendant, and a large outside mounted sign with forward and reverse instructions for the truck driver.
warranty
NORDOCK® guarantees that the PIT-HOOK™ Series vehicle restraints will perform as described and to the full satisfaction of the purchaser for One-Year from date of receipt or NORDOCK® will repair or replace the product at no charge to the purchaser. In addition, structural and hydraulic components are guaranteed for Five-Years. Warranties are subject to limitations on liability.
