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Jar Heads..... Army Mechanics are just as dumb, I know because I was one!A little foot note:
When I first drove my "new" M916 for a couple of miles at highway speeds, the TC got really hot to the touch....So of course I feared the worst, having not checked all the fluid levels yet. I pulled the oil level plug out, anticipating a low oil level.....instead I was drenched, by what appeared to be about two gallons of extra gear oil!!!
I guess someone wanted to make sure, that the TC had good lubrication and must have filled it to the brim with oil!!!!..... trough the vent plug i guess.....
Soni
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Ok Eldgen, you're being funny now!....That's not in any way what I was trying to say! lol..... first of all I would NEVER generalize on issues like that and second of all, if there where indeed a few "bad apples" out there.... YOU ARE CERTAINLY NOT IN THAT CATEGORY!!!!!!Jar Heads..... Army Mechanics are just as dumb, I know because I was one!
You are very welcome James.....I certainly did not mean to insult you by calling you "DEER" I meant to say "ELK" of course! lol
You do now! Check your email...
Unless I am seriously mistaken.... The hydraulic pump is located on the transmission. The manuals you now have will tell you how to activate the pump.
If this were your only use of hydraulics on the truck I would suggest taking the PTO pump off and using an electric pump like on a lift gate. Reason I say this is obviously for the PTO pump to work the engine must be running. Also, the manual says that before you operate the winch, you need to run the pump for 30 minutes to warm it up. I'm not sure you would have to do that just to raise your roof though. With the electric pump you could move your roof whenever you wanted to without the engine needing to be running.
You do know how much large hydraulic winches weigh right?? LOL.. I'm most likely going to use them front and rear but they are impressively heavy. Anyway, if your going to be mounting hyd winches then yeah, keep the PTO pump. Just be aware they do not work like electric winches do where you winch and drive the vehicle out of your stuck, you use only the winch. On the M920 the manual says to engage the PTO with the transmission on 1st gear and then shift into neutral and idle up to operational speed. So you can drive and winch. Meaning you need a winch large enough to do the job solo.
Of course.
According to the book: Curb weight M920 = 30,270lbs. (15 tons) But, yeah, always better to be high than low when calculating such things. This is why I am contemplating using the 45k winch on the back, (And MAYBE one on the front as well) because I'll have at least another 20k lbs on top of the truck for a GVW of about 50k lbs. Get that stuck and a Warn 8k just might not be quite enough....
LOL it might not even work for my concept but it is at least worth investigating!
Your right, you could use the same reservoir, all you would have to do is "T" into the suction and return line at the port, (Or install a second set of ports in the tank) and run the lines to your electric pump. In fact, that is probably a good way to do it.
TM 9-2320-273-20Section XXVII
Yes that is correct it is two identical pumps joined together by a removable splined shaft. You can take the pump apart and remove the rear pump and put it back together. The gaskets are reusable, you will need to buy 8 shorter hex bolts and locktite everything back together, takes about 15 minutes, super easy.
Yeah, that was the first vision that came to mind when I saw the question.
As mentioned above they make valving that diverts the excess pressure back to the tank.
I would agree with your statement for a rear winch, if it ever gets that bad you are not going to want to go forward anyways. The 20k winch never came hydraulic just pto, you can put a hydraulic motor on it and convert it. The 20k is also conservatively rated like everything else the military puts out. I would save the big bucks for a trick between the rails rear winch and make that your biggie.
OK, if I understand this correctly, the M920 is a fixed displacement system. Is this because the winch does not actually “use” fluid, (meaning like a ram would “use” or temporarily store fluid to extend the ram and then return it to the system when the ram retracts). (More about ram usage below) If you wanted to run both a stock 45k winch that needs the full 44gpm and (not at the same time, but on the same vehicle) a 30k winch that uses 20gmp what do you need to do to make the lower flow tool work properly?
I assume this changes some if your using rams (like to level the vehicle) because the rams “Keep” some of the fluid. Of course (I assume here) that if your using the rams, your not using the winch at the same time so the loss of fluid would not matter because by the time you winch the rams will have given their fluid back and the reservoir is plenty large enough to fill my 4 cylinders and then some… Correct?
I am thinking about building my (sleeping) bed sideways across the front of the box and using some kind of motors to raise it up to the roof leaving the dining area below. I would be interested in discussing the linear actuators (possibly in another thread so we do not hi-jack this one away from things relayed to the truck itself) to learn more about them. That same conversation would likely help with the roof question as well.
I was thinking of either a simple straight ram with a foot/base that would (manually) swivel up when not in use like the smaller trailer tongue jacks, OR finding real outrigger legs from a utility truck/crane/big wrecker and fitting them to the truck. I understand the linkages your talking about but that seems intensive in design and implementation.
I searched youtube and easily found several videos of that. Most only show the combine moving along the hill already “Adjusted”. After 4 or 5 I found one that shows a combine adjusted and then make a u-turn on the hill and go back, all the while keeping the cab level. That was actually pretty cool. I am guessing in addition to the controller you would need some electric/hydraulic control valves and that even used parts can’t be inexpensive. But it would be a cool system. I know they make auto leveling jack systems for RV’s, it may be possible to get the necessary electrical components and use them to run our larger jacks once they have been pivoted into the vertical position. For those interested: YouTube - newholland al 59 4x4 3
Cool, good to know!
When stuck, backwards is almost always easier than "More stuck"...lol (Not always of course, but usually)
Isn't the 20k winch on the 900 ( M925/928 ) series hydraulic? How do you go about converting from PTO to hyd? I know you need a hyd motor but what motor is the question? Is it something that can be gotten from a place like Northern Hydraulic? Does it bolt up directly to the winch or do you run a shaft from the motor to the winch "Fooling" the winch into thinking it is running off the PTO shaft
No the 900 series is still pto, just the m35a3 is hydraulic afaik. To convert it is not a big deal, you can go here to find the odds and ends to put it together. As far as what motor, I would call those guys and quiz them, its a little over my head. Typically you could just run a motor with the same sized shaft and collar it, or unbolt the drive shaft from the winch, drill and bold a plate to replace it and weld on whatever system you want to use.
Ok, pump part of the system is the only part that dictates a fixed displacement. In other words, the winch motor and cylinders can be used with a variable displacement pump system as well as the fixed displacement. Yes, the M920, which states a "gear pump" is fixed displacement.
This is the cool part of the tandem pump. If the winch is on one circuit (pump section), then you can work the winch and the cylinders at the same time, and not either circuit effected by the others work pressure or flow.
An excavator is a variable displacement, pressure compensated system. I dont wish to go off on that and confuse the issue, but it is different than the system on the trucks here.
Yes.
Actually, the linkages may get you just what you need without the space usage of a direct cylinder hookup. However, that too may be best drawn out in a different thread.
But it's the cool factor.................
