Author Topic: No brakes when engine is running  (Read 1906 times)

Offline CK9404

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Re: No brakes when engine is running
« Reply #15 on: August 17, 2022, 10:05:14 AM »
No other ideas?

Offline JohnnyPopper

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Re: No brakes when engine is running
« Reply #16 on: August 17, 2022, 02:57:18 PM »
Sorry to leave you hangin...

So with truck in the air, on stands, what ever, will the brakes engage without vac? As in will they stop if you spin the wheels?

With foot on the brake, if you start the engine and engage the transmission, vac off, will it hold the rear tires still?

If they don't stop the rears, turn OFF the motor to let the wheel come to a stop.

Thanks for follow up, it really is weird.

VZ what kind of MC are you talking about? PLS...
1957 Apache 3100 235 Inline 6, 3 on the tree
1973 C-20, 3+3 454 4BBL TH400  Water Injection
1978 K-10, 350 4BBL TH350 NP203 M.M. Part time Kit/Hubs
1980 C-10 under construction

Offline VileZambonie

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Re: No brakes when engine is running
« Reply #17 on: August 24, 2022, 07:09:18 PM »
I'm super busy, best I can say is I believe I have previously posted on this as well as googling will help you find a bunch of compatible quick takeup masters that will fit your booster. Just pay attention to the line position (typically reversed) and or the need for adapters if keeping the same brake lines.
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10