Left Brake problem on 640

nashranch · Mar 5, 2018

So yesterday I jacked up tractor to remove wheels for painting. I decided to check out brakes while the wheels were off and the first thing I noticed was only one blue return spring on the left side and two on the right side( see the pics). My left brake does not return to a neutral position so am wondering if adding another spring would help with that. Last week I had the cross shaft out and it looked great and all linkage is clean and free and well lubed. I might add I screwed up on the right side and knocked the soft plug outta the inside of the trumpet on the brake camshaft. Aww c r a p I said. So today I pulled the right trumpet to fix the soft plut issue. Also cleaned some crud outta the rear end sump. Thinkin i'll change my name to Ramblin Mike.

Any thoughts on adding another spring to the left side brakes??

nashranch · Mar 5, 2018

(quoted from post at 20:02:22 03/05/18) So yesterday I jacked up tractor to remove wheels for painting. I decided to check out brakes while the wheels were off and the first thing I noticed was only one blue return spring on the left side and two on the right side( see the pics). My left brake does not return to a neutral position so am wondering if adding another spring would help with that. Last week I had the cross shaft out and it looked great and all linkage is clean and free and well lubed. I might add I screwed up on the right side and knocked the soft plug outta the inside of the trumpet on the brake camshaft. Aww c r a p I said. So today I pulled the right trumpet to fix the soft plut issue. Also cleaned some crud outta the rear end sump. Thinkin i'll change my name to Ramblin Mike.

Any thoughts on adding another spring to the left side brakes??

showcrop · Mar 5, 2018

I looked around my shop for hours for the missing spring for the left side, then finally looked it up and found that it called for just one on the left

nashranch · Mar 5, 2018

i read that too showcrop...wonder why? My left brake actually drags when depressed and left go. Right now i have a Bungee cord pulling back on the brake linkage.

Another question about the outer seal on the axle. What is the best way to get the sweat coller off to service the outer bearing and seal.

One more question...how does that outer bearing get any oil for lubrication?

Dean · Mar 5, 2018

It only calls for one but I install two on each side.

Dean

grandpa Love · Mar 6, 2018

That big metal collar is tough to
get off. Drill 3-4 holes through
it then bust it with a cold
chisel. Bearing doesn't come off
easy either. Seal is easy! Collar
must be heated very hot and beat
back on. If it cools and isn't on
all the way........... Bearing
gets oil,if seal ain't leaking
leave it alone! Fixed a leaking
seal on a 640 few months back.
Lucky the local tractor shop
helped

riveroadrat · Mar 6, 2018

The manual says to drill the collar with a collar or stop on the bit to keep it centered. When you go through the collar you will feel it stop when you hit the hardened surface behind it. Then you crack it open with a chisel. I hear the dealers dont charge that much to do it. The outer seal may just keep the bearing grease in and the water out.

nashranch · Mar 6, 2018

(quoted from post at 21:51:00 03/05/18) It only calls for one but I install two on each side.

Dean

Another spring ordered...will put two on the left side too

nashranch · Mar 6, 2018

Left Brake definetly works good with two springs on it

Left Brake problem on 640

nashranch

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nashranch

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showcrop

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nashranch

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Dean

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grandpa Love

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riveroadrat

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nashranch

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nashranch

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