Just want to clear up a couple of comments on the Powermaster brake
booster. It is not the same system as the GM Hydraboost. The Powermaster is
a self-contained unit and it's pump is operated by a built-in electric motor
while the Hydraboost gets is pressure from the power steering pump.
Also, there are not 10 applications in a Powermaster with no electricity
to the pump. There will be three or four, which is still good. The 10 pumps
comes from the GM instruction to press the pedal 10 times to ensure all
pressure it gone before working on the unit.
The weakness in the Powermaster is an internal switch the operates the
motor and I strongly suggest to anyone who gets one to add an good reliable
external switch such as the RY11 and solder closed the internal switch.
Having said all that, I have Powermaster complete with adapter and
wiring for sale and an additional new accumulator. I have just installed
four rear discs and had to go to the larger-pistoned master cylinder.
Al Hamilton
76 Eleganza II
Kingston, Ont
booster. It is not the same system as the GM Hydraboost. The Powermaster is
a self-contained unit and it's pump is operated by a built-in electric motor
while the Hydraboost gets is pressure from the power steering pump.
Also, there are not 10 applications in a Powermaster with no electricity
to the pump. There will be three or four, which is still good. The 10 pumps
comes from the GM instruction to press the pedal 10 times to ensure all
pressure it gone before working on the unit.
The weakness in the Powermaster is an internal switch the operates the
motor and I strongly suggest to anyone who gets one to add an good reliable
external switch such as the RY11 and solder closed the internal switch.
Having said all that, I have Powermaster complete with adapter and
wiring for sale and an additional new accumulator. I have just installed
four rear discs and had to go to the larger-pistoned master cylinder.
Al Hamilton
76 Eleganza II
Kingston, Ont
