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641-Interesting pump-prime remedy


 
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jeff pk
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Joined: 16 May 2012
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Location: Pacific NW

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PostPosted: Thu Apr 03, 2014 10:33 am    Post subject: 641-Interesting pump-prime remedy Reply to specific post Reply with quote


My hydraulic pump was leaking oil from the gear/engine-drive connection, so I decided to remove the pump. PO failed to install any gasket there at all so it was an easy fix, but the prime was lost in the pump when it was reinstalled and on reading the archives I tried to fiddle with the pipe-plug on top and blow air into the dipstick hole---both of which only got the pump to judder the lift slowly up. The real fix came by jacking up the rear end high---so that it was above the front, and running it for awhile while I raised and lowered the lift---after about 10 minutes it was smooth as silk. Question: what's happening inside that's priming the pump?

Just curious...
 
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sunbeam
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PostPosted: Thu Apr 03, 2014 10:43 am    Post subject: Re: 641-Interesting pump-prime remedy Reply to specific post Reply with quote

works almost every time I drive the front end into the road ditch and leave the back wheels on the road.
 
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Dean
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PostPosted: Thu Apr 03, 2014 11:01 am    Post subject: Re: 641-Interesting pump-prime remedy Reply to specific post Reply with quote

Be advised that the shim gaskets between the hydraulic pump and the engine block are used to set drive gear backlash. Add/remove as necessary.

Dean
 
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jeff pk
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PostPosted: Thu Apr 03, 2014 11:34 am    Post subject: Re: 641-Interesting pump-prime remedy Reply to specific post Reply with quote

I remember reading that. Should it ever be entirely free of a gasket?
 
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Dean
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PostPosted: Thu Apr 03, 2014 12:05 pm    Post subject: Re: 641-Interesting pump-prime remedy Reply to specific post Reply with quote

I cannot imagine why. It will leak without.

Dean
 
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mhb@ufe
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Joined: 05 Mar 2009
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Location: Jefferson Maine

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PostPosted: Thu Apr 03, 2014 3:29 pm    Post subject: Re: 641-Interesting pump-prime remedy Reply to specific post Reply with quote

As sunbeam said, driving the front end inti a dish is a common method. If you think about the oil level along a straight line toward the front of the tractor and that is how high the oil is in the suction tube. When you raise the back of the tractor the oil level raises at the front there for raising the oil level in the suction tube.

Mark
 
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Larry NCKS
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Joined: 23 Dec 2001
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Location: Washington, KS/Lincoln, NE

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PostPosted: Thu Apr 03, 2014 5:03 pm    Post subject: Re: 641-Interesting pump-prime remedy Reply to specific post Reply with quote


Hmm!!! Drive the front end inti a dish? Won't that break the dish??? Laughing Rolling Eyes

Sorry! Couldn't resist!
 
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mhb@ufe
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PostPosted: Thu Apr 03, 2014 5:38 pm    Post subject: Re: 641-Interesting pump-prime remedy Reply to specific post Reply with quote

You have to use a Tupperware dish :-)

Mark
 
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Larry NCKS
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PostPosted: Fri Apr 04, 2014 2:28 am    Post subject: Re: 641-Interesting pump-prime remedy Reply to specific post Reply with quote

Laughing
 
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mhb@ufe
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Location: Jefferson Maine

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PostPosted: Fri Apr 04, 2014 4:22 pm    Post subject: Re: 641-Interesting pump-prime remedy Reply to specific post Reply with quote

must have been thinking about food instead of tractors. Hope I didn't put my food in the ditch.

Mark
 
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Hobo,NC
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Location: Sanford,NC

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PostPosted: Fri Apr 04, 2014 6:44 pm    Post subject: Re: 641-Interesting pump-prime remedy Reply to specific post Reply with quote


Nutter head different thought "THUMBS UP"
 
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