I have worked on dozens and dozens of these trucks years ago,but we can't even get parts for them in my area. Finding the right booster is impossible, a master cylinder kit unavailable and most of those trucks have been cut up for scrap. But back when I was working on them on a regular basis. We did not have much luck bleeding them without a power bleeder. The combined volumes of the wheel cylinders and and the amount of fluid you can pump with one pump of the master cylinder makes it tough to get all the air out.Bleed the booster first, then the rears and then the fronts. Here's a quick test to try. Shut the engine off. Pump the brakes until all vacuum is gone. Pump the brakes until you have as close as you can get to a full pedal.Hold that and start the engine. You should feel the pedal drop when the vacuum comes on.If it doesn't you have a bad booster or no vacuum.You will also have this problem if the drums are badly worn. Even if the shoes are adjusted up, the pistons are so far out in the wheel cylinders you don't have enough volume of fluid to compress them all in one pump. Hopes this helps.
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Today's Featured Article - A Lifetime of David Brown Tractors - by Samuel Kennedy. I was born in 1950 and reared on my family�s 100 acre farm. It was a fairly typical Northern Ireland farm where the main enterprise was dairying but some pigs, poultry and sheep were also kept. Potatoes were grown for sale and oats were grown to be used for cattle and horse feeding. Up to about 1958 the dairy cows were fed hay with some turnips and after that grass silage was the main winter feed. That same year was the last in which flax was grown on the farm. Flax provided the fibre which w
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