OTC 7853 Proportioning Valve Depressor for ABS Brake Systems.
Proper service procedure requires that a proportioning valve depressor be installed on the 4WAL unit when pressure bleeding the brake system. For best results on 4WAL, use two of these depressors, one for each valve.
Services a wide variety of General Motors utility vehicles, vans, and pickups with Kelsey Hayes anti-lock brake systems. Also works on RWAL systems and must be installed on the proportioning valve (only one depressor required).
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