Re: 560 hyd pump swap

Posted by Joe Evans on July 26, 2004 at 06:56:31 from (209.41.233.109):

In Reply to: 560 hyd pump swap posted by Chris Brown on July 24, 2004 at 19:28:03:

Chris: from the information I've gleaned from the I&T manual for this series tractor, I don't recall any major stumbling blocks when swapping out pumps.

IH used both Cessna and Thompson as hydraulic pump suppliers for these tractors. I recently removed a shot Thompson and installed a rebuilt Cessna. The Cessna installed perfectly except for the pump drive gear: the key had to be shortened about 1/8".

Also, these tractors were equipped with 12 GPM pumps as standard with a 17 GPM pump as an option. There MAY be a problem with trying to install a 17 GPM pump in place of a 12 GPM and vice versa. I don't know how the the 17 GPM pump gets its rating--whether it simply is a larger pump and/or the pump is turned faster by way of different drive gear ratios. Check the S/N of your tractor. If I remember correctly, the S/N suffix for should end in "S-Y" for a tractor equipped with a 12 GPM pump.

The power steering pump piggy-backs on the hydraulic pump.

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