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should have trusted MY instincts (bad water pump)

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robert brown

04-10-2007 13:41:43

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Turns out my first guess was correct. After doing all the "easy" tests, Not so easy when the thermostat was installed in the uppper hose (yes pointy end to the front) on the radiator end of the hose. (dont ask me why, ask the guys at New Holland.) I had to destroy the hose to get it out. It checked fine. Waste of time and a good hose. Changed and tensioned ther belt, flushed the rad and jacket. PLenty of flow in all the right places
THen I tested it without a thermostat in place.
NO CIRCULATION!!!! BAD WATER PUMP!!!!!

So tomorrow I replace the pump, anyway. What a waste of time.

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Big B

04-11-2007 09:56:30

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Re: should have trusted MY instincts (bad water pu in reply to robert brown, 04-10-2007 13:41:43

Robert it is never a waste of time when you are working on your tractor. Just look at the exper you have learned.

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Danny in CO

04-11-2007 07:58:00

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Re: should have trusted MY instincts (bad water pu in reply to robert brown, 04-10-2007 13:41:43

I respectfully disagree that it was a waste of time. If the thermostat was in backwards, when you changed the water pump, you still wouldn't have had flow. In my opinion, you fixed one of the 2 problems you had.
Good luck,
Danny

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Bob

04-11-2007 08:38:18

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Re: should have trusted MY instincts (bad water pu in reply to Danny in CO, 04-11-2007 07:58:00

The way I read it, the thermostat was NOT installed backwards, just higher up in the hose, rather than close to the cylinder head as is desired.

If the hose is not clamped around the thermostat, they tend to migrate higher up in the hose when the system is hot and pressurized. (I supose the warm, pliable hose expands a bit under the pressure and allows the t-stat to move from the pressure of the water pump.) Usually, the cooling system still works OK even if the t-stat moves up a bit in the hose.

I hope he posts back and tells us what he found with the water pump... if the impeller is loose on the shaft or damaged.

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Jimmyjack

04-10-2007 19:33:22

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Re: should have trusted MY instincts (bad water pu in reply to robert brown, 04-10-2007 13:41:43

My thinking is with Bob. Ive yet to see one that didnt pump some water. Usually bearings or seals, but still pump SOME water?

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Bob

04-10-2007 17:44:26

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Re: should have trusted MY instincts (bad water pu in reply to robert brown, 04-10-2007 13:41:43

Is something visibly wrong inside the water pump... impeller loose on the shaft or rusted out or broken?

If there's no damage like that, I'm afraid you'll find you're "barking up the wrong tree" by replacing the water pump.

They are a simple centrifugal pump, and, if the impeller is reasonably intact and turning, they pump water!

It's darned seldom they suffer one of the failures I mentioned, but it DOES happen!

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Ross Pugh(NC)

04-10-2007 16:40:05

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Re: should have trusted MY instincts (bad water pu in reply to robert brown, 04-10-2007 13:41:43

But you got the best thing from that episode ye could get. they call it 'EXPERIENCE'. Diagnostic experience, thinking things out that could be wrong and narrowing down to what was wrong; experience in mechanicing by repairing the problem after the diagnosis and most of all the pleasure of doing it yourself and saving all that money ye would have paid out to hire it fixed. Now ye are qualified to help someone else with similar problem. Now ain't that a "Satisfied Feeling"?

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Ross Pugh(NC)

04-10-2007 16:51:09

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Re: should have trusted MY instincts (bad water pu in reply to Ross Pugh(NC), 04-10-2007 16:40:05

Oh and the best lesson of all ye learned that thee people at NH make mistakess, too, like the thermostat. Can ye imagine what they could have done with somethingas important as a water pump if they screwed up on the thermostat as small as it is. I think you were lucky.

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dan hill

04-10-2007 14:50:52

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Re: should have trusted MY instincts (bad water pu in reply to robert brown, 04-10-2007 13:41:43

You could have tested the thermostat while it was still in the hose.With age comes wisdom...

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Dell (WA)

04-10-2007 14:20:45

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Re: should have trusted MY instincts (bad water pu in reply to robert brown, 04-10-2007 13:41:43

Robert..... ..NOT a waste of time, you found the thermostat WRONG END of radiator hose. You also learned how to remove radiator hoses..... ....Dell

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