Archive through February 20, 2011

[sblunier]

Norm,

Make sure there are no burrs on the edges of the marks and put it back together. At this point it will either work (possibly with a little less charge pressure) or it will not provide the required charge pressure and starve the main pump....but in either case the damage has been done to the one part you MUST have for hyd. lift, so you are not out anything trying it to see.

I would bet that it will still work, but will sacrifice pump pressure under heavy lift loads. When you put it back together check the charge pressure per the book. If you can keep 150-200 psi warm/hot on the charge pump circuit and 500-600 psi on the lift circuit you haven't totally ruined it.

And make sure you put the charge pump on with the flat side to the right (otherwise you will have low charge pressure due to reversed pump housing machining)

 

[nbartee]

Steve,

Thanks, I may do that if I can't find another pump. As you know, it's a lot of work just to find out.
My Dad always said "Experience is the best teacher, but it's expensive"!

 

[dtanner]

Steve Blunier "Mr. Plow" (Central IL)

He can salvage his mistake by taking any burrs off the charge plates that will reduce the pressure the pump will make . If he is within spec he might have a working hydro.Why take that chance ?This site will help you in every part of maintenance of a Cub or any part of that. so why go off half ?

 

[sblunier]

Don,

Because the part that was damaged is THE PART that differentiates between a ported and non-ported hydro, and is the most expensive to find used. If he's not going to try it, then he will need to find another used ported hydro (and send me the damaged one....

)

 

[nbartee]

Okay, what about taking this to a machine shop & have that entire surface planed to remove the indent, around .050"? I don't see why dropping that surface would hurt but I don't know. Machine shop might be too expensive also. What do y'all think?

 

[dtanner]

Steve Blunier "Mr. Plow" (Central IL)
what Norm did was to cut down on the pressure the Charge pump can make by the burs he made. I could fix it but there would be some abuse for others here. The face has to be within spec for the pump to work and produce the pressure for the hydro to work!The hydraulic pressure only has to meet 800 psi.
I hope the pump face is not damaged that it will not produce that pressure efficiently to run the hydro.

Please ask for Help .. , I know Kraig has all ways helped me when I needed help and would to anyone ( there are no stupid questions, just ask )there is everything to learn without causing your self grief. I do share what I know and do most.impatience is a killer.

 

[aaytay]

Norm,
What did it take to finally get the pump apart?

Kraig-
That's funny, I took before/after pics too. I'd say we got about 8-9", but it's been coming down cats-and-dogs since I went out at 10am, so we're probably going to end up with another 3" by the time it's all done.

I'll throw some "action" shots up over in the Sandbox section.

 

[kmcconaughey]

Art, did you set your camera up on a tripod and leave it in the same spot for those two photos? If not you did a great job taking those two photos from the same location.

 

[aaytay]

Kraig-
Thanks, that was the intention, but no I didn't use a tripod. I used an "index point" though. I just leaned up against the edge of the garage door opening when I took the first pic so I knew where to come back to for the "after" shot.

 

[nbartee]

Aatay,

At the time, I didn't know to take the charge pump off first.