NH 7308 Loader Owners

Kevin_in_VA · Oct 26, 2003

Thanks Danny! Hey Spence, how about PMing me with your return address so that I can get this back to you. That is unless someone else needs it.

Kevin

Kevin_in_VA · Nov 4, 2003

Got the gauge rig in the mail yesterday. Will not have a chance to do any testing until this weekend. However I can tell you all that I can lift my front wheels about 8 inches off the ground with the bucket in the dumped position (I have a toothbar on it). Anyone else that wants the gauge post a reply here, otherwise it goes back to Spencer.

Kevin

SteveInMD · Nov 4, 2003

</font><font color="blue" class="small">( I can lift my front wheels about 8 inches off the ground with the bucket in the dumped position)</font>

You can lift the front while only pushing the control forward and not to the side at all?

F_22 · Nov 13, 2003

I would like to borrow the tester. TC33D / 7308 arrives tomorrow. When I asked the dealer to check the pressure he looked at me like I was crazy.

F_22 · Nov 13, 2003

OK, the dealer showed me the TC29/TC33 shop manual and here's what it says:
Spec hyd pressure is 2130 PSI +/- 70 PSI.

This means:
2200 is considered limit by the factory.
The 1800 figure mentioned earlier in this thread is
erroneous.

In my case:
I saw the gage read 2160 and thats where they left it.
The 7308 loader will easily lift the front wheels off the
ground with nothing on the 3-point.

thcri · Nov 13, 2003

My manual says the relief valve is set for 2133psi. 2130 +/- 70psi seems way to hi to have a relief set at 2133? I just don't think I would run mine that high.

murph

SteveInMD · Nov 13, 2003

There is more than one pressure relief valve. There is a 'Main System Valve' and a 'Front (Double Spool) Remote Valve'. The pressure testing being discussed here only tests the 'Front (Double Spool) Remote Valve'. I believe your dealer showed you the spec. for the main valve.

All 7308 loaders will lift the front end up. Some people can lift the front without using the curl action (stick pulled right). They use only stick forward to lift the front. You didn't say which one you did.

F_22 · Nov 13, 2003

I believe you're right. They tested the main valve. I thought there might be another relief valve in the loader valve group but they didn't test that. I should have asked that question but I was afraid of looking too stupid.

The 2130 +/- 70 figure is not inconsistent. I'm going by memory. 2130 (or 2133) is nominal, +/- 70 is simply the tolerance.

The front end will lift off either with the bucket curled down or not. The front tires only come up about 1 inch with the bucket level because the boom hits the stops. With the bucket curled almost all the way down it lifts about 10 inches off. In neither case did I use the curl cylinders.

It will be interesting to see what the pressure is at the loader. I'm only beginning to understand the hydraulic circuits and functions. My speciality is aerodynamics, which is not much use for a tractor.

Kevin_in_VA · Nov 14, 2003

I apologize for not getting back to you sooner. I have been having computer problems, and have been enjoying my new granddaughter..

I can lift my wheels about 4" without dumping the bucket, and an additional 4" dumped. I tested my pressure and it was at 1800, I tweaked it up to 1900 and got another 2" out of it. So now I have 10" of lift. More than enough for me. I will be sending the test rig to rh1346. Reed, I'll get it out to you on Monday. You can then send it on to F 22.

Kevin