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Discussion Forum

H belly pump troubles

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06-21-2001 07:37:09

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The belly pump in my '39 H is pumping no more. No pressure(won't lift the empty 3 pt hitch), normal sound when engaged, and yes plenty of hydraulic fluid in the tank. It was run continuosly through a 3 way valve and return line to the tank, to power the cylinder on my rear three point hitch. I haven't pulled anything apart yet, so any suggestions would be helpful.

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06-22-2001 06:46:52

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 Re: H belly pump troubles in reply to jmyt_47, 06-21-2001 07:37:09  
I agree with Doc. Get a gage, take the line loose to the 3 way valve and put the gage in it. Then start her up put her in neutral and let out the clutch and pull the lift all lever to the lift position and see if you are getting any pressure. You should notice some load on the engine if the lift all is working. Running the lift all in lift position going through a 3 way valve won't hurt anything. The pump runs all the time anyway and going through the 3 way valve and returning puts no pressure on it until you activate the valve to lift.

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06-21-2001 17:16:39

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 Re: H belly pump troubles in reply to jmyt_47, 06-21-2001 07:37:09  
I would hook a pressure gauge inline before pulling it apart. Should be about 800 psi. The other thing is to set the contol rod for the belly pump in the neutral position, pull it to the lift position and see if the engine slows. This would indicate the belly pump is working. Doc

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john d

06-21-2001 10:48:07

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 Re: H belly pump troubles in reply to jmyt_47, 06-21-2001 07:37:09  
They normally don't quit abruptly; they tend to die slowly!

I had one quit suddenly on an M once. When I took the cover plate off the bottom of the tractor, I found the pieces of the drive coupler on top of it. I hope you're that fortunate!

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06-21-2001 11:04:25

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 Re: Re: H belly pump troubles in reply to john d, 06-21-2001 10:48:07  
I guess I'll find out when I pull it this weekend.

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The Red

06-21-2001 08:49:51

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 Re: H belly pump troubles in reply to jmyt_47, 06-21-2001 07:37:09  
If the belly pump abruptly stopped working, I would suspect something wrong in the 3 way valve.

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06-21-2001 09:38:11

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 Re: Re: H belly pump troubles in reply to The Red, 06-21-2001 08:49:51  
The valve was brand new. I have since retrofitted it into the loader hydraulics with the rear pto mounted pump. It works great, but I can use any rear pto implements because the pump is in the way.

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