woods 7500

[schmism]

WOOT happy dance

after 3 years of looking, wanting, yearning, putting off projects... has come to an end.

we finnally bit the bullet on a $2900 woods 7500 that i found on CL. (w/ 16" bucket)

but allas My happy dance lasted only a short time. for then it was time to figure out how to hook up my new toy.

so it came with a QA mount for a skidsteer. this is infact just a bolt on plate that is added instead of the standard 3pt hookup or subframe hookup (all 3 options bolt on to the hoe in the same place)

but before i can investigate how to best mod the the attachment i need to get the thing up off the ground to the 9-15" clearance recommended by the manual.

to do that i need to hook up they hydraulics. ya should be easy right? ive got a power beyond port plus 2 rear remotes... how hard can it be right!

grrrrrrrrr

so i have never figured out were the power beyond return is on a TC33D. ive read numerous threads, some suggest the rear fill point on the rear axle, some say there should be a second port on the PB block, some talk about running a hose up to the main FEL distribution block.

well hear are some pics people of a TC33D with 2 rear remotes.

the PB male port on the side of the rear remote pack.

(talk about wrestling that female connector on there )

the 2 rear remotes

the front distribution block for the FEL (no help hear as far as i can tell)

the rear side (side faceing the front of the tractor) of the remote pack/PB port block

for now im off to pick up parts to put a second male end on my hoses (or make a male to male adapter likely so that i can connect the BH to a rear remote and tie the handle forward. But id like to use the PB long term because i expect better performance from the PB by not having to go through a rear remote spool.

 

[RickB]

The first photo shows the RETURN location for the backhoe hydraulics in the end cover of the remote valve stack.

The hose/tube coming FROM the loader control valve TO the distribution block gets split and the backhoe inlet line connected to the hose coming FROM the loader control valve. The line leading to the distribution block will remain disconnected, and the hitch and rear remotes will be disabled while the backhoe is connected. This is the New Holland factory backhoe connection methodology.
Do not start or operate the tractor when the power beyond line leading from the loader control valve is disconected from either the hoe or distribution block.

 

[schmism]

The hose/tube coming FROM the loader control valve TO the distribution block gets split and the backhoe inlet line connected to the hose coming FROM the loader control valve. The line leading to the distribution block will remain disconnected, and the hitch and rear remotes will be disabled while the backhoe is connected. This is the New Holland factory backhoe connection methodology.

hmmmm ok so i read that like 4 times, now im going to go outside and see if i can make some sence of it. :thumbsup:

 

[RickB]

hmmmm ok so i read that like 4 times, now im going to go outside and see if i can make some sence of it. :thumbsup:

Your loader control should have 3 hoses leading from/to the distribution block. One of the ports should be labelled PB. That's the one that you need to interrupt.

 

[schmism]

Your loader control should have 3 hoses leading from/to the distribution block. One of the ports should be labeled PB. That's the one that you need to interrupt.

ok thats simple enough to understand

so that i understand it right. of the 3 hoses that are shown in the pic.

fluid always flows the same way in those three hoses? Supply (from the pump) to the FEL spools (from the PB port) and 2 return lines?

One of the ports should be labeled PB. That's the one that you need to interrupt.

put a T in with QD for the BH or interrupt. like either BH or FEL but not both?

oh and ive currently got it running off one of my rear remotes for the moment, but still in the process of comming up with a custom sub frame mount.

 

[RickB]

ok thats simple enough to understand

so that i understand it right. of the 3 hoses that are shown in the pic.

fluid always flows the same way in those three hoses? Supply (from the pump) to the FEL spools (from the PB port) and 2 return lines? .

Fluid always flows the same way in each of the three hoses. 1. into the loader valve. 2. power beyond flow to the diverter block and on to the rear remotes and three point 3. return flow from the loader cylinders and valve to the diverter block and back to tank.

put a T in with QD for the BH or interrupt. like either BH or FEL but not both?

oh and ive currently got it running off one of my rear remotes for the moment, but still in the process of comming up with a custom sub frame mount.

No 'Tees' just QD's. If you want to continue running it from a rear remote, that's fine, too. No reason to go to a power beyond setup if you don't want to. Just remember, it's possible to activate the three point hitch and possibly bend something or pinch yourself because the hitch and remotes are still 'live' that way. There won't be a noticible difference in backhoe speed or power.

 

[schmism]

Just remember, it's possible to activate the three point hitch and possibly bend something or pinch yourself because the hitch and remotes are still 'live' that way.

im currently working on a subframe mount so the lower 3pt arms will either be removed or disabled. :thumbsup:

 

[rdln]

Hey, good job.

I have put ~100 hours on mine and am happy with it, just dont expect it to be real backhoe.

Two things I want to mention are:

With that size tractor and a subframe you will need and 20 foot ramp to get it on a trailer.

and in the area show in the pic, inpsect the hoses for wear, I have replaced two hoses there.

 

[newt615]

RickB,
I have a TC45DA and just purchased a NH758C BH and have a few ?'s on hydraulic hookup. By looking at the Owners manual i can find the pressure return FROM the FEL valve to the hyd manifold block although there is no letter designation on the FEL valve, there is however on the pressure TO the FEL valve, it has a N cast in it. I figured I could remove the steel line which comes FROM from the FEL valve and make it hose with a female QD to adapt to the male QD running through the subframe tube. I will put a male QD on the hyd manifold on the pressure FROM FEL valve port to hook up when BH is not on. for the return, can i use the port on the remote valve stack cover as a return from BH also as on schmim's tc33 or should i put a t on the hyd fill plug by the dipstick and plumb a male connector into it?
dont want to get it wrong and deadhead the pump or something like that!

 

[dboacres]

I have a new Woods 7500 that's not hooked up yet. Have PTO pump and 3 point mount. Was going to put on Ford 2110, but now considering using Ford 1710. Not sure if 1710 can handle stress. Anyone have info? Have heard but never seen tractor broken by backhoe.

 

[Opti-Mist]

I have a new Woods 7500 that's not hooked up yet. Have PTO pump and 3 point mount. Was going to put on Ford 2110, but now considering using Ford 1710. Not sure if 1710 can handle stress. Anyone have info? Have heard but never seen tractor broken by backhoe.

I ran my Woods 750 3pt backhoe on a 1710 with no problems. Just don't horse it around and you'll be fine.

 

[schmism]

going to pickup steel tomorrow for the subframe. wanted to play with the new toy. worked it today doing some light digging on a 3pt hookup. had to fab up a solid 3pt link as a standard adjustable length top link wont fit in the mount under the seat.

few notes on operation.

I can see how many people feel that "out of the box" the controls feel quick even at a mild 1500rpm. but within an hr or 2 i was getting the hang of it and really wanting 2 or even 3 movements at once. At which point the speed of the movements really drops when you start opening both spools simultaneously. The controls on my 2000 7500 allow a movement from both sticks at the same time. effectively sharing available gpm. IE the more you open a second spool, the progressively slower the first movement travels. Interestingly enough woods has valved the spools such that (or perhaps based on geometry of the hoe) that if you pull back on both sticks simultaneously, it will raise the boom and draw the dipper to you in the ratio that is correct to dig a flat bottom trench. I assume this was intentional as it really helps digging when all you have to do is set the bucket curl right and then yank back on both sticks.
Is that also the case for full size hoes also?

a thumb will have to be fab'd up also :-D

 

[dqdave1]

I've had a 7500 for 10 years now. I consider it a very well built backhoe for our size machines. The only improvement I would like to see would be dual cylinders for boom swing, instead of the single cylinder and chain.

 

[DavidVT]

I have a 750 mounted on a 3pt with pump. The tractor is a 34hp and this seems to be a good match. I echo the concern about the hoses at the stabilizer joints. I rarely run the BH above idle as it is rather long in the tooth.

Take care on a temporary 3pt setup. The concern is having enough strength to prevent the upper arm from crushing you into the ROPS. A way to demonstrate the forces would be to 'mentally' try and push the tractor forward by pushing the bucket away from you. My upper link (from the woods kit) has two vertical braces that lock the arms and top link into one position. For example the 3 pt control can not move anything once it is all locked up.

Enjoy!

 

[dave1949]

im currently working on a subframe mount so the lower 3pt arms will either be removed or disabled. :thumbsup:

For the factory NH subframe mount, you leave the three point arms on. I raise mine all the way up before switching the QD to backhoe. They aren't too much in the way but right next to the feet pads on the backhoe.

Don't know how alike our tractors are, but if you need a measurement or something, just ask. My hoe is off now, so I can measure parts easily.

Dave.

 

[sksmsllc]

Holy Cow! That's all I can say about what you've done here.

 

[schmism]

For the factory NH subframe mount, you leave the three point arms on.

how can that be?

the only spot i see on the rear to "hang" the subframe off of is either

1) the axle casting which doesnt seem to have enough space with the ROPS mounted like it is
2) the lower pins were the rear of the 3pt arms connect
3) the draw bar.

so what does the rear of the sub frame hang off of for your setup?

 

[schmism]

trying to plumb the PB again... (been running off the rear remotes up till now)

The hose/tube coming FROM the loader control valve TO the distribution block gets split and the backhoe inlet line connected to the hose coming FROM the loader control valve. The line leading to the distribution block will remain disconnected, and the hitch and rear remotes will be disabled while the backhoe is connected. This is the New Holland factory backhoe connection methodology.

1,2,3 lead to/from FEL spool control. none are marked on distribution block or on FEL spool bock. other than 1 and 3 tie into the "back" side of the spool block and 2 ties into the front of the block. (i can add pic)

4 is hard line that seems to feed the rear 3pt and remote spool pack.

5 is a hard line that ties into the bottom of the tractor casting toward the rear axle.

If i understand the system right, its one big loop utilizing open center spools for all items in the loop. So if one were to trace the path of a single drop of oil in the system it would go on this path.

from the pump on the side of the engine,
in to the "distribution" block and past the relief valve.
onto a inlet hose for the FEL up to the FEL spool
through the fel spool (if the FEL is not being operated) to the return hose
back to the distribution block (these are hoses 1,2,3 above)
onto the hardline that supplies the rear remotes/3pt
through the center of the rear remote pack, makes a 180deg turn in the end plate of the remote pack and back through the remote pack on a separate return path to the 3pt valve.
from the 3pt valve dumped into the rear casting were the filter is connected, through the filter, back through the LARGE hardline seen above to the low side of the pump.

only item in this path not covered is hardline #5 above which is the "return" path for any fluid that passes when the relief opens anytime the pressure in that loop exceeds the preset level.


SO to plumb a power beyond for any implement that needs unregulated flow for an open center spool you can interupt that loop at any place.

for instance, route the "return" from the FEL spool to the rear for (in my case) the backhoe. which means if you pull a FEL lever and backhoe lever at the same time, the backhoe will stop because flow upstream is being diverted to the FEL.

or you can interrupt the hard line that supplies the rear remotes (line 4 above) and divert it to the backhoe. thus the rear remotes wont work when the BH is connected.

or add a endplate to the remote pack stack that routes the fluid through the BH before returning it. as woods sells for there BH's (see http://www.tractorbynet.com/forums/...7b-bh-my-1720-woods-90x-install-manual-pg.jpg)

any of these points can be used to supply fluid to the powerbeyond item.

but as others have said, YOU MUST MAINTAIN THE LOOP AT ALL TIMES!


SO

if my understanding of the "auxiliary" hydraulic system is correct, can anyone help me better understand which of the 3 hoses above (1,2,3) that all lead to/from the FEL is the supply to the FEL and which is the return from the FEL.

would you have 2 supply and one return?

 

[gooffer69]

Ok so I just picked up a woods 7500 with a subframe to mount on the back of a TC45DA with a 16 loader.... well it appears I am missing something not sure yet.

There is 3 hoses coming of the 7500, and I have 2 remotes on the back of my NH that in the past I have only used for my log splitter....

The 3 hoses are 2 female and one male connector, the back of the NH has to female.... not enough males lol...

anyway no idea which goes which, no manual. I have the subframe mounts and will start with that I believe the previous owner said to remove the rear lift bars.... would be much easier if I could connect the hydraulics and just use the stablizers to lift the woods up to the right height and just back into it....

Not sure what to make out of the hook up instructions I saw here... so the 2 rears I have now is one loop ? like one going out, one coming back... confusing ... help could be useful