Super H hydaulics weak?

RTSMikeM · Jun 1, 2010

I've got a 1953 Super H.
I'm trying to determine if there is something wrong with the hydualic pump.

Last night I hauled two loads of dirt on a tip up trailer with cylinder underneath. The 1st load dumped just fine. 2nd load tractor could not dump.
It made the usual pump noise...but nothing moved.
Didn't lug the motor at all.

Finally I "helped it" but using bobcat to lift the front up a bit so tractor could handle it.

Is there anything that could be wrong inside the pump or need replacing? Are there tolerances that must be tighter? The pump oil level is fine.

Adjustments?

Thanks!

mkirsch · Jun 1, 2010

First off, what kind of pump does the tractor have, belly or live? That was a transition year for the H-series tractors, so it could have either.

Second, was the second load significantly larger/heavier, or possibly wetter than the first?

I take it after you tipped the trailer up some, the tractor was able to finish the job?

Did you try revving up the tractor's engine to increase pressure?

You really need to pressure test the system with a gauge. A belly pump will produce around 800PSI, and a live pump will produce around 1250PSI.

RTSMikeM · Jun 1, 2010

Its a belly pump.
2nd load was heavier, more wet, yes.
Tractor was wide open and nothing moved.
After bobcat lifted a couple of feet tractor finished.

At no time did it seem to lug the tractor in any way, even idling.

I guess I'm looking for information about possible wear in the pump if any.

gene bender · Jun 1, 2010

Whats the dia of the cycl that can make a huge difference

mkirsch · Jun 1, 2010

In a 57-year-old tractor, wear is a given.

A pressure test will tell you if it's worn enough to be a problem. You should be seeing at least 750PSI for a belly pump.

bc · Jun 1, 2010

Hello mkirsh and others. I have a related question for you. If a pump is wearing out to the point of needing replacement, what do you see first? A reduction in pressure below the popoff rating of the system, a reduction in flow where hyd cylinders move slower, or both, or either one (if either which one usually first)?

Thanks, I'm just thinking out loud with my system that always has enough pressure to bump the bypass valves open such as when holding the valve open when a cylinder reaches the end point. Guess I need to invest in a guage and fittings anyway to see what is happening.

armand tatro · Jun 1, 2010

Have you checked the hyd. oil level? Is the cylinder double or single acting? Armand

Red Mist · Jun 5, 2010

Watch how you word your responses, boys. He's very sensitive to that.
mike

Super H hydaulics weak?

RTSMikeM

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mkirsch

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RTSMikeM

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