York Compressor Onboard Air Schematic - Air Tank & Dual ARB Locker Plumbing

This document is a simple hand-drawn pneumatic (on-board air) system schematic showing how a York compressor feeds an air tank and dual ARB air lockers. The diagram traces airflow from the York Compressor through a Safety Valve and a Check Valve into the Air Tank. From the tank, a line runs to a manifold/junction that connects to a Guage (gauge) and a Pressure Switch, plus a tap labeled 'Accessories Tools' for running air tools or other accessories. A downstream line passes through a Pressure Regulator, then splits left and right, each branch passing through a Solenoid before terminating at an ARB Locker (front and rear axle air lockers). The schematic conveys the correct component order for an onboard air setup: compressor, safety/check valves, storage tank, pressure switch and gauge for monitoring/control, and regulated, solenoid-controlled air delivery to the ARB differential lockers. No part numbers, pressure values, hose sizes, wire colors, or year/model information appear on the drawing. It is one page of a multi-page pneumatic chart set uploaded to a 1989 Ford Bronco gallery, illustrating a common aftermarket onboard-air/locker plumbing layout.