A few things come to mind. Before we start, I too hate hydroboost!
First, it's already been mentioned, the shoe to drum fit. If the lining isn't radiused the same as the ID of the drum, the shoes will flex causing low pedal, but also spongy pedal. Since you have good pedal on the second pump, I don't think this is the real problem.
Also there could still be some air. If you don't have a reverse bleeder, you can make one with a new, clean oil pump can (might run some brake cleaner through it first, just to be sure) and a short piece of hose. Pump the can until you get solid flow, put the hose on the wheel cylinder bleeders, and pump backward through the system. Helps to have someone watch the master cylinder to see if air comes out.
Another suspect is the master cylinder. Not sure, but worth doing some research, I suspect the standard master cyl bore is smaller than the cyl used with hydroboost. Maybe the wrong master cylinder.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - An Old-Time Tractor Demonstration - by Kim Pratt. Sam was born in rural Kansas in 1926. His dad was a hard-working farmer and the children worked hard everyday to help ends meet. In the rural area he grew up in, the highlight of the week was Saturday when many people took a break from their work to go to town. It was on one such Saturday in the early 1940's when Sam was 16 years old that he ended up in Dennison, Kansas to watch a demonstration of a new tractor being put on by a local dealer. It was an Allis-Chalmers tractor dealership,
... [Read Article]
Latest Ad:
one 8n and one 9n tractor. totaly restored,pretty much everything is new. one 6ft blade good shape.
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
