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Cub Hydraulic Pump Seal

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Ron Weber

01-15-2008 20:32:30

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Gentlemen and Ladies, I need help. An I am not talking about the head shrinking kind either!

I have a Cub low-boy that has a hydraulic pump mounted on the engine-you know for the touch control. I recently rebuilt the tractor after it sat for 7 years. The hydraulics had always worked well, but since the rebuild I have had to add oil to the hydraulics twice. I went to use the tractor last weekend only to find out that there was no hydraulics. Hmmmm. So I checked the dip-stick and sure enough the oil level is 1" higher than full---the seal is shot on the pump and leaked all that oil into the engine. So, I took the pump off and found that there is a leather seal for the pump and it's dried up and cracked. WHERE do I find another seal? Can I buy one? Should I bored it out for a modern rubber press in seal? Anyone know what to do?

As usual, thanks for saving my blood pressure. Ron in Michigan.

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gene bender

01-16-2008 09:26:39

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Re: Cub Hydraulic Pump Seal in reply to Ron Weber, 01-15-2008 20:32:30

Just take the old seal to any parts house and they will get you a new one. If the shaft is worn where the seal fits you will need a speedy sleeve. Take the pump along so they can get the correct speedy sleeve as you probably need one.

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01-16-2008 08:03:31

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Re: Cub Hydraulic Pump Seal in reply to Ron Weber, 01-15-2008 20:32:30

Here are couple pics.
You will need the correct pump number when ordering kit. Good luck.

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Dave from Texas

01-16-2008 06:47:55

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Re: Cub Hydraulic Pump Seal in reply to Ron Weber, 01-15-2008 20:32:30

The service manual shows two seals. The leather seal is labeled as "Old Type". The new type shows as an "O" ring. I am doing the same thing. I have not taken mine off yet. I have been draining the oil out of the engine and putting it into the hydraulics. Trying to get through the winter garden season!

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banjo

01-16-2008 05:21:13

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Re: Cub Hydraulic Pump Seal in reply to Ron Weber, 01-15-2008 20:32:30

farmall.com has sponsors that sell cub parts also.
should be a number on the pump so you can get the right parts.

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El Toro

01-16-2008 04:08:02

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Re: Cub Hydraulic Pump Seal in reply to Ron Weber, 01-15-2008 20:32:30

I don't have a breakdown on the Cub's pump, but this one may be similar. It's fairly common for these old seals to become harden and then wear a groove in the shaft. Napa has speedi-sleeves and Case/IH should have them too. The same thing happens to the hub on the crankshaft pulley and will cause an engine oil leak and a speedi-sleeve
will cover this worn area too. Hal

third party image
PS: Speedi sleeve on a pulley hub

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Gene

01-15-2008 20:39:15

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Re: Cub Hydraulic Pump Seal in reply to Ron Weber, 01-15-2008 20:32:30

Rebuild kits are available from your IH dealer. The front seal is sold seperately from the kit.

You will also need to know which hydraulic pump you have. I believe there are two different pumps available

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