Re: Master Cylinder


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Posted by Vaughn on Sunday, September 16, 2007 at 10:36:28 :

In Reply to: Master Cylinder posted by Matt in Md on Saturday, September 15, 2007 at 11:28:27 :

This seems to be mentioned quite often – PW, M37, WC brakes are less than satisfactory! There are several reasons this may be the case, but the most prevalent is: rust in brake lines, pits in cylinders, oxidation around pistons, etc., etc., from years of sitting around collecting moisture. If you want your brakes to work properly, this is what you have to do before you begin driving your truck:

1. Replace your brake lines and hoses
2. Rebuild your cylinders. You can’t have pits and scoring in the cylinder. If can’t get it out, buy new ones.
3. After you hone wheel/MC cylinders, wash with mixture of dish soap and water. Solvent does not remove hone grit and if you don’t get it out, it’s going to quickly ruin any new parts.
4. If you buy NOS, take the unit apart and look for pitting. Just because it’s NOS does not mean it’s as good as new. Again, moisture will get in and neoprene rubber parts loose strength and take new shapes over time. You may have to re-hone and replace rubber parts.
5. Recondition shoes/drums, if needed.
6. Make sure all the air is bleed from system.


I have cheap nylon tires and not NDT Military and I can lock these tires up when braking and I can guarantee I can put Michelins on and do the same thing. There is plenty of hydraulic pressure in the design to do the job. Disk brakes look nice, we can brag about having them, and parts are easier to get, but the old stock system, rebuilt correctly, works just as well and at less cost. Follow the above and you too can have good brakes that will do the job and provide years of service.




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