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Farmall & IHC Tractors Discussion Forum
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Super A hydraulic pump HELP

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GRB54

12-03-2006 16:25:01




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Have a Farmall Super A that is leaking hydraulic fluid down into sump- dealer says seals need to be replaced- how bad a job is it?




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El Toro

12-04-2006 06:49:20




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 Re: Super A hydraulic pump HELP in reply to GRB54, 12-03-2006 16:25:01  
It's probably the No4 seal in the parts breakdown.
You need to check that pump shaft for a wear groove where the seal contacts the shaft. Chicago Rawhide has a speedi sleeve repair kit if the shaft is worn. Hal



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El Toro

12-03-2006 18:08:32




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 Re: Super A hydraulic pump HELP in reply to GRB54, 12-03-2006 16:25:01  
Here's a breakdown on the hydraulic pump. Hal


third party image



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Janicholson

12-03-2006 16:52:30




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 Re: Super A hydraulic pump HELP in reply to GRB54, 12-03-2006 16:25:01  
Not bad at all.
There are (probably) two styles of pump. An "O"ring seal, and a traditional shell seal type.
They are both replaceable.
The shaft clearance needs to be checked to be sure the bushing in the end frame of the pump is good. If it is egged out it needs to be rebuilt with a new bushing. If good, the next item is to see if there is a wear groove from the seal or oring in the shaft. If you can feel it with your fingernail, it needs to be repaired with a speedy sleeve if it is an "O"ring seal. The speedy sleeve is pressed onto the shaft creating a slightly larger diameter than original. The end frame housing may need to be enlarged to allow it to be installed. this may include the use of a larger "O"ring.and the deepening of the "O"ring groove. Not a real problem for a hydraulic shop. If it is a traditional seal, the speedy sleeve is a possibility without much housing problem. The seal should be sized to match the speedy sleeve OD.
If a traditional seal is used w/o speedy sleeve, placing it in a position that is deeper, or more shallow so that the lip hits an unworn spot on the shaft is workable. If not, using a seal with similar OD and thickness, but a .005" smaller shaft spec. will probably work in the worn groove. Put a finger of petroleum jelly behind the seal and on the shaft when assembling to lube it on first rotation. Good luck, JimN

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Bob

12-03-2006 16:41:36




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 Re: Super A hydraulic pump HELP in reply to GRB54, 12-03-2006 16:25:01  
By "sump", do you mean the engine crankcase, or the area under the Touch Control Unit?



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GRB54

12-04-2006 06:31:42




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 Re: Super A hydraulic pump HELP in reply to Bob, 12-03-2006 16:41:36  
It is draining into the engine base



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SuperA-Tx

12-04-2006 07:08:32




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 Re: Super A hydraulic pump HELP in reply to GRB54, 12-04-2006 06:31:42  
Im wondering after reading the posts...

Is the leak comming from maybe around the governor houseing then running down behind where the pulleys are then onto the axle or onto the square tube where the implements hook up?



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