Yesterday's Tractor Co. Shop Now
   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
 
Marketplace
Classified Ads
Photo Ads
Tractor Parts

Community
Discussion Forums
Project Journals
Tractor Town
Your Stories
Show & Pull Guide
Events Calendar
Hauling Schedule

Galleries
Tractor Photos
Implement Photos
Vintage Photos
Help Identify
Parts & Pieces
Stuck & Troubled
Vintage Ads
Community Album
Photo Ad Archives

Research & Info
Articles
Tractor Registry
Tip of the Day
Safety Cartoons
Tractor Values
Serial Numbers
Tune-Up Guide
Paint Codes
List Prices
Production Nbrs
Tune-Up Specs
Torque Values
3-Point Specs
Glossary

Miscellaneous
Tractor Games
Just For Kids
Virtual Show
Museum Guide
Memorial Page
Feedback Form

Yesterday's Tractors Facebook Page

Related Sites
Tractor Shed
TractorLinks.com
Ford 8N/9N Club
Today's Tractors
Garden Tractors
Classic Trucks
Kountry Life
  
Minneapolis Moline Tractors Discussion Forum
Show Parts for Model:

ZA brakes

Welcome Guest, Log in or Register
Author  [Modern View]
Dpittman

06-12-2018 09:43:08




Report to Moderator

I went all the way back to page 23 trying to find this topic, but couldn't find it. Question is: what do I need to do to keep the brakes on this ZA from grabbing all at once instead of easy and progressive, i.e. according to brake pedal pressure. It don't matter how slow I push the pedals down it won't do nothing till a certain point and then a loud bang and tires start trying to slide. Got good shoes and springs, no grooves in the drums. So possibly adjusted to tight or wrong spring placement? The way they grab so fast and hard just ain't safe. Thanks. DP

[Log in to Reply]   [No Email]
t.r.k.

06-13-2018 18:36:10




Report to Moderator
 Re: ZA brakes in reply to Dpittman, 06-12-2018 09:43:08  
The drums turn backward because they are on the pinion shaft, not the axle. So what is 'front' and what is 'rear' are reversed from what is on a pickup truck or car.

The stronger spring goes on the anchor post last and it hooks to the rear (I know they are angled; so let's say 'upper') shoe. You want the front/lower shoe with the weaker spring to contact the drum first and start dragging before the upper/rear shoe contacts the drum.

These are self energizing brakes, so, moving in forward rotation, the upper shoe will add its force to the rear shoe.

If the upper shoe contacts the drum first, it will slam the lower shoe into the drum, which I think is what you are experiencing.

You adjust the eccentric to hold the upper shoe up near the drum and the spring at the adjuster then can hold the lower shoe away from dragging on the drum.

If your springs are 'tired' you might want to get a maxi-kit with similar springs from NAPA. (If you can. Some NAPAs 'don't do tractors.') That's what I used to do back in the '90s.

That is the way I remember it at least. If I am wrong, someone else will correct us.

[Log in to Reply]  [No Email]
jimwmn

06-13-2018 06:12:50




Report to Moderator
 Re: ZA brakes in reply to Dpittman, 06-12-2018 09:43:08  
Make sure the brake drums are smooth. If it has grooves this will cause the brakes to grab. I use a sanding drum in a drill press to sand the drums smooth smooth.



[Log in to Reply]  [No Email]
jnf

06-12-2018 19:08:23




Report to Moderator
 Re: ZA brakes in reply to Dpittman, 06-12-2018 09:43:08  
I will try to help, although I am not familiar with the ZA. I had the same problem with my U, probably similar shoe brake assembly.

Besides adjusting the screw with a brake tool, you also need to center the shoes in the drum with the cam at the top of the assembly. An IT shop manual or the MM owners manual will lead you through this step by step. Once adjusted, they are a smooth and effective brake.

[Log in to Reply]  [No Email]
Dennis P

06-13-2018 16:24:15




Report to Moderator
 Re: ZA brakes in reply to jnf, 06-12-2018 19:08:23  
Wrong spring placement. I doní t remember off hand which way they go.



[Log in to Reply]  [No Email]
Dpittman

06-14-2018 06:07:20




Report to Moderator
 Re: ZA brakes in reply to Dennis P, 06-13-2018 16:24:15  
Thanks again. I knew it was adjustment or springs or both. All I need now is some time. DP



[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


TRACTOR PARTS TRACTOR MANUALS
Fast Shipping!  Most of our stocked parts ship within 24 hours (M-Th). Expedited shipping available, just call! Most prices for parts and manuals are below our competitors. Compare our super low shipping rates! We have the parts you need to repair your tractor. We are a company you can trust and have generous return policies. Shop Online Today or call our friendly sales staff toll free (800) 853-2651. [ About Us ]

Home  |  Forums


Copyright © 1997-2018 Yesterday's Tractor Co.

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.

Yesterday's Tractors - Antique Tractor Headquarters