3x20 300CX hydraulic operating pressure

[Rob-D]

Yep, that's the pressure they engineered it for, just like the way Dodge, FMC or GM engineers design their vehicles & we all know nobody tries to get any additional power out of them right? Maybe that's why the automotive aftermarket is such a thriving industry, or perhaps the performance wheel/tire industry, I'm sure some engineers hate to see the vehicles they design modified, but it happens everyday, and yes they are still operating just fine. How about the tire & wheel combinations you see on 4 x 4 trucks.......all of that additional unsprung weight (and various backspacing distances) can't be good, but they're going up & down the road everyday.

Equipment is made a certain way because it will fit the needs of a broader user network, it doesn't mean it can't be modified to fit an individuals want's or needs and still operate trouble free for years. Sometimes a bit of modification is the difference to making equipment more useable; how many older JD tractors (larger ones, not CUT's) are running around this country that have been turned up over spec to accomodate larger plows, discs etc? Or maybe that Road tractor (tractor/trailer) that has had the fuel turned up a bit just so it will pull that heavier load over the mountain a bit faster? Need I go on? That's right now we're talking, a farmer or a truck driver has a choice to either turn his machine up to make it more useable (even if it is outside of spec) or to leave it stock & be unhappy with the performance; I know plenty of both that have opted to go through with the mods anyway.

While modifications may not be for all, I for one still like to make my own choices and in some cases I will choose to modify if necessary. If the small amount of pressure increase was so critical to the engineers, why did they make it so easy to adjust? They could have just as easily made a pressure relief valve with less range or even one that was not adjustable at all.

First off, you're not modifying anything. All the hoses and parts are the same. You're upping the pressure. That's called exceeding the manufacturer's recommendations.
Secondly, pushing a device beyond it's designed limits results in premature wear or failure. If we take an engine with a specific volume (cu/in) and increase the HP, by putting a blower on it for instance, the life of the engine is shortened. HP goes up-life goes down. It's simple physics, that's why race cars and dragsters get rebuilt after every run or race. You don't get something for nothing.
Want more loader power? Get a bigger tractor. Machinery is designed within parameters.

So now you want to increase the pressure. Are you putting in pump to handle that extra pressure? So what do you think the pump in there that is designed to operate at 2500# is going to do? How about not last as long.
Rob

 

[Nitro-Fish]

First off, you're not modifying anything. All the hoses and parts are the same. You're upping the pressure. That's called exceeding the manufacturer's recommendations.
Secondly, pushing a device beyond it's designed limits results in premature wear or failure. If we take an engine with a specific volume (cu/in) and increase the HP, by putting a blower on it for instance, the life of the engine is shortened. HP goes up-life goes down. It's simple physics, that's why race cars and dragsters get rebuilt after every run or race. You don't get something for nothing.
Want more loader power? Get a bigger tractor. Machinery is designed within parameters.

So now you want to increase the pressure. Are you putting in pump to handle that extra pressure? So what do you think the pump in there that is designed to operate at 2500# is going to do? How about not last as long.
Rob

I am modifying the relief pressure of the hydraulics (and yes still in the parameters of the hoses etc), kind of like turning up the fuel delivery on a diesel truck or tractor (yea there are injuction timing curves etc to consider when working on trucks or tractors) well not really the same but you get the picture, so yes that qualifies as a modification of some sort. As far as race cars getting rebuilt after every run, that happens on the pro circuit, but not the norm for most folks that would be reading this forum, I bracket raced for years with a BB Chevy Camaro but I never had to rebuild it after every race (I was getting 711HP out of it 20 years ago, not high by todays standards but back then that wasn't bad on just Cam 2). Maybe you didn't notice that I don't want or plan on getting a bigger machine. I believe a FEL capacity increase will suit my needs. I'm no stranger to modifying equipment, I think everything I own has been modified in one way shape or form; my chainsaws, mowers, motorcycles, and vehicles, love the differences with them all. I haven't looked (because I'm not really concerned about the small amount of increase we are talking about) to see if deere or any other manufacturer uses the same pump at a higher output, but it wouldn't surprise me to find that they do (wouldn't be the first time). It's no secret Deere rates equipment a bit different for similar pieces; the engine in the 3320 is found in other machinery (though not in the Deere line) with higher HP ratings!