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Home >> Triumph >> 1971 >> Spitfire Not Available Trans >> Repair and Diagnosis (Single Page) >> Brakes >> Mechanical - Hydraulic >> Brakes - GIRLING >> Adjustment >> Bleeding Hydraulic Brakes >> Re-Centralizing Pressure Differential Valve

Re-Centralizing Pressure Differential Valve

If brake warning light stays on after bleeding brakes (with ignition switch on), re-centralize valve shuttle as follows: Connect a rubber hose to bleeder valve on brake circuit (front or rear) opposite to circuit bled last. With hose in partially filled jar, open bleed valve, turn on ignition switch, but do not start engine. Brake warning light will glow, but oil warning light will not. Exert a steady pressure on pedal until brake light dims and oil light glows. A click should be felt on pedal as shuttle returns to its mid-position. Tighten bleed screw.

NOTE: If pedal is applied too hard, shuttle will move to other side of valve and procedure must be repeated.
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