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We are close to successfully fully restoring this beautiful 47 dodge 2 ton. Master cylinder restored, wheel cylinders restored, wheel cylinder pistons placed & restored, brake liners replaced, etc. We thought we properly tested our Hydrovac booster initially but brakes work at about a 75% success rate = pressing on the pedal truck comes to a rolling stop but not an immediate stop as necessary. ** We’ve checked the vacuum lines and they seem to be solid (no leaks), but will give it another check. We’ve made a major break adjustment to make sure that the shoes are properly meeting the drums, and completed a minor brake adjustment for the spacing between the brake pads and drums. Questions: 1. What is the proper method to test a Hydrovac booster when still installed? What are telltale signs that it needs a rebuild? 2. When adjusting brakes with wheel lifted off the ground how many rotations if any should the wheel make when brakes are adjusted properly? How much drag is OK. 3. Any resources for a Hydrovac booster rebuild kit, or are we better to purchase a new and donate the booster to our classic treasure chest Collection ?? Many thanks, Jason AutoOwners.org
