Document O1xVEv4wMqJ0EN8n8amXL4BYw

ocf' f FEBRUARY 6, 1976 BULLETIN PLAINTIFF'S EXHIBIT \0. Q32 under brakes I FOR BRANCHES. DISTRIBUTORS AND CUSTOMERS. CHASSIS AFFECTED ALLENTOWND HAYWARD(Zf OAKVILLE ANTI-WHEEL LOCK WIRING (Mack Western RL, RS, WL and WS Models with MVSS121 Brake System) PURPOSE To advise of a change in the anti-wheel lock warning unit wiring. RECOMMENDATION Inform all service personnel of the revised wiring and stress importance of determining which system is in use before attempting to diagnose a malfunction. INFORMATION Starting October 19, 1975, connections at the anti wheel lock warning unit "W" terminals were changed. Connections for current and non-current chassis are as follows. Chassis built on and after October 19, 1975 Two-axle vehicles - W1 terminal monitors steering axle W2 terminal monitors rear axle Three-axle vehicles - W1 terminal monitors steering axle W2 terminal monitors bogie forward axle (no change) W3 terminal monitors bogie rear axle Chassis built prior to October 19, 1975 Two-axle vehicles - W1 terminal monitors rear axle W2 terminal monitors steering axle Three-axle vehicles - W1 terminal monitors bogie rear axle W2 terminal monitors bogie forward axle W3 terminal monitors steering axle When trouble shooting the anti-wheel lock system determine, e ither by build date or physically tracing the wiring, which system is used. This practice will insure that time is not lost checking the wro ng axle related components. CIRCULATION Service Manager Shop Foreman bight Foreman bight Foreman inspector Leadman Inspector : Leadman Inspector Leadman Unit Over haul Room Service Operations, Allentown, Pa. U.S.A. Shop Office Mackz