790 and 3005 Hydraulic Shimming

[dieselcrawler]

.
As I believe I mentioned in a previous post...make sure you keep adequate ballast on that 3PH.

Yup... you mentioned it at least once... in every post! *grin* thanks for lookin out for me... rear ballast is an issue I am aware of... and have plans to add to my box blade. Look for pictures of the mods when I post them... springtime most likely.

 

[Tractor Pilot]

Wish I had a gauge to have checked before and after psi.

dieselcrawler,

You can build your own gauge. It's easy. Here is a thread where I mention how I built mine: http://www.tractorbynet.com/forums/...-term-effects-790-hydraulics.html#post2359077

Bruce

 

[dburner3]

I did the shim modification to my 790. Used it about four years like that before I sold it to buy the 4005. I did not have a way to test the pressure so I did what had been suggested - add just one pack. One pack increased it enough for me, and I felt that any more would just be too much for that size and weight tractor.

As an FYI, I also shimmed my 4005. I was a little irked that even with a 300cx loader I wouldn't have the same lifting capacity as a 3000 twenty series. This time I built a gauge and added enough to make 2500psi. Have only used it like that for a few months, but seems to be fine. Wasn't sure what the pump was capable of - there was an odd line in the specifications that said the pump operating pressure range was 2400-2700 psi. From the factory it is set at 2200 I think. I guess if that's true I could have went more, but who knows...

Hello, I have and like my4005 except that my friend's 30H Kubuty loader out-lifted mine. I used a gauge and have 2150 lbs of Hydro-pressure. I intend to shim her and have a few questions for you since you have done this. Where is the cap for the relief spring and does it use the same shim kit as the 790? Thanks, Daniel

 

[RoyJackson]

Hello, I have and like my4005 except that my friend's 30H Kubuty loader out-lifted mine. I used a gauge and have 2150 lbs of Hydro-pressure. I intend to shim her and have a few questions for you since you have done this. Where is the cap for the relief spring and does it use the same shim kit as the 790? Thanks, Daniel

There's a picture attached to post #1.
Now, that's a 790/3005..your 4005 is a new number for the 990. You'll have to check with a dealer to determine if it's the same shim kit...also, I suggest you check with a dealer tech to see if the 790/3005 uses the same hydraulic valve as the 4005

This is a pretty old thread, BTW...