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Installing umbrella seals

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Ardie Dedrickso

10-17-2006 17:12:20

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I have a 1950 H that I am going to install unbrells seals on. It smokes when I start it so hope it will help. I don't know anything about this, but have a friend that is a good mechanic. I need the tork setting on rocker arms, I have the valve adjustment. Any tips or good advice would also be apprecitated. Thanks for your help.

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ronnee

10-18-2006 23:31:58

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Re: Installing umbrella seals in reply to Ardie Dedrickson, 10-17-2006 17:12:20

use big block chevy umbrela seals, they will work..

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Brownie 45

10-18-2006 17:38:00

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Re: Installing umbrella seals in reply to Ardie Dedrickson, 10-17-2006 17:12:20

Could you have a restriction in the air cleaner [dirt buildup] or other restriction such as a collapsed hose in the air intake system? this could cause apparent over fueling & carbon build up.

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Steven@AZ

10-17-2006 19:19:02

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Re: Installing umbrella seals in reply to Ardie Dedrickson, 10-17-2006 17:12:20

I don't understand why, after over 50 years of successful use, people want to modify a working engine. A little blue smoke at startup is nothing. If you have constant blue smoke, that means your rings or valve guides are shot - bandaid is not going to fix the problem.

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Ardie Dedrickson

10-18-2006 14:59:34

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Re: Installing umbrella seals in reply to Steven@AZ, 10-17-2006 19:19:02

Steve,
I agree with you 100%. The only reason I'm doing this is because it fouls plugs in no time. Compression is 120 on all four cylinders wet or dry. Tractor starts and runs perfect. I don't want to do anything to change that. So let me know if you think if installing the umbrellas will change that. Thanks for your advice.

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Steven@AZ

10-18-2006 15:50:55

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Re: Installing umbrella seals in reply to Ardie Dedrickson, 10-18-2006 14:59:34

Thanks for giving the extra information - some of us need to see the "whole picture" in order to make a suggestion...

Do you run the tractor only for short periods of time?

Do you have a working thermostat installed so the engine comes up to temperature in a short period of time?

What do the fouled plugs look like? If they are black, you have a fuel/air problem - running rich or just not run long enough to warm up.

Have you tried hotter plugs? I believe Champion D19 are the standard, D21 will be hotter and less prone to foul. Our 544 fouls the D19 in a day (fresh overhaul) but the D21's never a problem - we only run for short periods of time...

I hope this helps you out!

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Janicholson

10-18-2006 06:12:28

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Re: Installing umbrella seals in reply to Steven@AZ, 10-17-2006 19:19:02

Steven, In most cases, you are correct, there is no need. I believe the choice is less problematic than many other modifications done to tractors. The use of stem seals can assist in reducing plug fouling and oil consumption in a unit that is often idled. Most engine manufacturers use seals today that are far more directly in control of the guide oil than umbrella seals. (to meet emissions requirments, and reduce wear by providing controlled lube). It will be fine. My two cents, JimN

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Bill in OH

10-17-2006 18:46:07

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Re: Installing umbrella seals Ardie Dedrickson in reply to Ardie Dedrickson, 10-17-2006 17:12:20

Ardie dont worry so much of torquing the rocker arm just get them good and snug they'll be fine.I give you a good tip to put the seals on? if you take and old spark plug break the porcealin out of it braze a fitting to fit you air hose thread it in the plug hole put up to 100 psi in cyl colaspe the spring and remove then replace seal be carefull not to push real hard on valve stem if you drop a valve you are going to be pulling the head. Bill

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Nebraska Cowman

10-18-2006 05:45:22

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Re: Installing umbrella seals Ardie Dedrickson in reply to Bill in OH, 10-17-2006 18:46:07

I've never tried it but another tip is to thread a length of soft rope into the cylinder through the sparkplug hole and run the piston up against that to hold the valves.

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Bill in oh

10-18-2006 06:45:10

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Re: Installing umbrella seals Ardie Dedrickson new in reply to Nebraska Cowman, 10-18-2006 05:45:22

I Have used the rope thing and it works.I went down through the muffler on a hay rake once and change the bilhooks.That the part i enjoy about trying to help these a$$$ holes they know it all but don't know how to get there hands dirty.??()()???%$$@*()_+&&^%!@!

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