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47 hydrulic pump problem

Mon Feb 18, 2013 10:54 am

Hi all, I'm in the process of rebuilding a 47 cub that has hydrulics and the pump is leaking oil into the block.
I will admit that I took the pump apart when I took it off and now need help fixing my problem.
Thanks Frank

Re: 47 hydrulic pump problem

Mon Feb 18, 2013 11:01 am

Frank, Welcome to the Forum. Here's a link to a pictorial that should help you with the rebuild: viewtopic.php?f=11&t=44196
If you have any problems or questions as you get into it, feel free to ask.

Bob

Edit: most of the kits have extra o-rings/fiber washers so that the newer version of the pump can also be rebuilt. Replace what you take out and don't worry about the extras.

Re: 47 hydrulic pump problem

Mon Feb 18, 2013 11:25 am

That is a very good tutorial, but there are a couple things that are not covered, One is that not all pumps used an O-ring, some early ones used an oil sea instead. second, not all pumps used the little rubber buttons that are shown, I do not know if that coincided with the oil seal change or not. Since a 47 would not have originally had a hydraulic system, and it would have been installed later you have to go by what is there, not what should be there. If your pump uses the seal rather than O-ring, the part number is IH 355742R91 which is a NAPA 5068. For smoothing a shaft that has a seal groove or is a little rough I like to use these in my Dremel, they are called Abrasive Finishing Buffs, and are available form 180 to 320 grit. They are made to be used with the EZ-Lock shaft, but can also be used with the original screw type shaft.
Image

Re: 47 hydrulic pump problem

Tue Feb 19, 2013 11:55 am

John, what is the size of those abrasive discs that you show in your photo? How do you chuck them in a Dremel tool? Stanley

Re: 47 hydrulic pump problem

Tue Feb 19, 2013 4:23 pm

They are approximately 1 inch across and attach to the Dremel using either the EZ lock mandrel http://www.dremel.com/en-us/Accessories ... ?pid=EZ402 or the standard mandrel http://www.dremel.com/en-us/Accessories ... px?pid=402

Re: 47 hydrulic pump problem

Tue Feb 19, 2013 6:43 pm

Thanks for the info, John. My wife is a wood carver and has several Dremel tools with lots of bits of various kinds, but I had never seen the EZ lock mandrel.

Re: 47 hydrulic pump problem

Tue Feb 19, 2013 8:55 pm

thiggy wrote:Thanks for the info, John. My wife is a wood carver and has several Dremel tools with lots of bits of various kinds, but I had never seen the EZ lock mandrel.
That is a fairly new item, only been on the market for a couple years so far as I know. You can mount those wheels on the standard mandrel with a screw, but the EZ Lock is much handier. Which is good, because those abrasive wheels do not have a very long lifespan.
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