Brake pump

Rolls Royce and Bentley: Rolls Royce Silver Shadow plus Bentley T-Series from 1971 to 1980 (from VIN...12400 to 41686)

with a 3/4" union on the end of the high pressure pipe that fits to the top of the brake pump - reconditioned, in exchange

This item is sold on an exchange basis so a core unit surcharge will apply.
Our reconditioning process involves initially stripping the pump down so that every component can be deep cleaned and inspected for wear. The body is then Aquablasted, ensuring that any rust or contamination is removed. Special care is taken to ensure that the castellated section of the main body is serviceable. We refinish any damaged teeth in order to allow continued use of the correct fitting tool. The unit is then rebuilt with brand new O rings, main spring, inlet valve, inlet valve spring, washer, spacer ring, seating ring, non-return valve and circlip.

Once complete the unit is tested for full functionality on our hydraulic test rig which replicates, as closely as possible, the conditions that the pump would experience during normal operation on the vehicle. Prior to VIN...12400 (approximately) all cars were fitted with thin bore pipes between the brake pumps and the accumulator spheres. The brake pumps for these models were fitted with a 5/16" union on the high-pressure pipes. From VIN...12400 (approx) a thicker bore pipe was fitted which required larger 3/4" unions on the pipes between the pumps and the valve bodies. The larger bore pipes are recommended as a modification. Earlier models may, therefore, already have been upgraded so please check the union size on your pump prior to ordering.
Very often problems with brake pumps and low system pressure are caused by wear on the lobe on the camshaft that activates the brake pump push rod. In order to try to rectify this problem without having to replace the camshaft (a very costly job) we have machined some flanges to be 0.030" (inches) thinner than the original. If your camshaft lobe is worn then we recommend fitting this flange and then shimming the flange in order to obtain the correct push rod heights.