30.20.16 - Main Switch HD 1000A -
$25.27
$31.59
PDWA Valve (Pressure Differential Warning Actuator) for the brake hydraulic circuit.
This valve connects the front and rear brake circuits and monitors the pressure balance between them. If one circuit loses pressure, the internal shuttle moves off-centre and closes a switch, illuminating the brake warning light to alert the driver to a hydraulic fault. For drum-brake systems without ABS.
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