-N PRODUCT DESCRIPTION DESCRIPTION The WM763 is a panel-mounted three-way control valve with push-to-exhaust action. The valve does not incorporate an internal spring and must be returned manually to the exhaust position. The WM763 control valve is available with a blue or black plastic knob, and each knob is inscribed with a functional description (shown in the external configuration below). All knobs feature a white band that indicates whether the valve is in the applied or released position. OPERATION The valve does not require a minimum supply pressure for operation. When the knob is pushed in, the supply port opens to allow delivery to the outlet port. Since this valve is not automatically returned by a spring, it must be manually deactivated. When the knob is pulled out, the supply port closes, and any pressure at the outlet port is discharged through the exhaust port. APPLICATION The WM763 control valve can be used in any pneumatic circuit where a manual on-off valve is required. In air brake systems of heavy duty tractor-trailer combinations, this valve is often used with the WM762 parking brake valve as an optional manual control for the tractor spring brakes. To distinguish the WM763 from the WM762, the WM763 has a 1 Vs -18 UNEF threaded mounting nut. The WM763 control valve complies with the provisions of FMVSS-121. WILLIAMS CONTROLS, INC. 14100 SW72ND AVENUE, PORTLAND, OREGON 97224, TEL: (503) 684-8600, TELECOPIER: (503) 684-8610, TELEX: 15-1145

PARTS IDENTIFICATION SPECIFICATIONS ITEM BODY END CAP STEM POPPET WASHER LOCKNUT (114592) O-RING SQUARE SEAL SCREW NUT SPRING PIN (117071) BUTTON Service this unit with repair kit number 117659. To replace the button on the WM763A4A or A8A, refer to the ordering information block. Other replaceable items are followed by part numbers. * Asterisk designates parts included in repair kit 117659. *For continuous operation beyond this range, contact factory. TO ORDER, SPECIFY WM763 Model Number Suffix PART NUMBER- SELECT SUFFIX & PART NUMBER BELOW