Removal of 755 backhoe attachment from 4500

kkl

Member
I've read prior posts about removal of the backhoe from the 4500 but have a couple of questions. First, I'll quote those posts:

http://ytforums.ytmag.com/viewtopic.php?p=3406514#3406514
(quoted from post at 21:25:48 04/26/10)]Basically, lay down a sheet of plywood under the hoe. Extend the dipper stick out about 1/2 way, curl the bucket all the way and lower the boom until the pressure is off. Lower the stabilizers. Now loosen the connecting hardware. Should be 2 nuts that are about 1 1/4" to 1 1/2". Somewhere in that range. I actually have different ones on each side -- stuff happens over 45 years....

Then pull the connecting hardware up and back out of the way. It will be sort of stiff unless you have done it recently. With it out of the way (the hoe won't jump off), slowly raise the hoe by pressing down with the stabilizers. Raise it up (and straight by manipulating the dipper stick) until it is free of the saddles (bottom connection point). I like to put 3 or 4 strong jack stands under the hoe box on top of the plywood. 2 in the back and 1 or 2 in the front. Then lower the box down onto the stands, but still at least 2" clear of the saddles to allow for settling. The shut off the engine, take off the hoses, loop the hoses. The smaller one goes on the TRACTOR SIDE and the larger lower pressure return hose is looped on the hoe side. Then just drive off.

Hopefully, you are on a dead flat area. If not, situate it so you drive off slightly uphill. That will make reattachment easier. The trick on it is to get close and use the hoe hydraulics to move the last couple inches. Hopefully you have enough hose to do that. (I don't and it's a PITA).
There was a reference to a more detailed post being in the archives, but I never could find it.

http://ytforums.ytmag.com/viewtopic.php?p=4639594&sid=12fc20d3e7e7df091e3bd85fd5ccde1e#4639594
(quoted from post at 22:04:26 09/26/11)
Dismounting the hoe is easier than some people make it - you use the hoe to dismount & park the hoe, and then you disconnect the hydraulics after it's off the hooks of the tractor and blocked up solidly. Loop one high pressure hose on the hoe, the other on the tractor, and look for a cap screwed onto a plug under the deck that fits the return low pressure line - the cap goes on the tractor, the hose goes on the plug. Set the bucket well out as you manipulate the stabilizers and bucket to move the hoe after you've loosened the hook clamps - it's both more stable, and also the bucket really never should be parked any closer in than vertical dipperstick.

Here's a photo of the rear connections on my 4500 (to the right and behind driver's seat):

IMG_0003.JPG

[color=red:0db20f7a6e]Is that connection on top in the middle some kind of quick connect? If so, how do you disconnect it?[/color:0db20f7a6e] Sorry for the elementary question.

My low pressure return hose also has one of these connectors.
IMG_9897.JPG

However, under my deck, I see a male threaded connector, but no cap. [color=red:0db20f7a6e]When I disconnect this hose, what can I cap the tractor side with?[/color:0db20f7a6e] I couldn't find this in the New Holland parts catalog online.

Thanks for any help.
 
The quick disconnects you have on all three lines are disconnected by pulling back on the knurled collar. You may have to push the connector towards the other line a little. Both the male and female ends of the quick coupler should seal when you remove them, so you won't need the cap. Make sure you connect (loop) the other two lines back together on the tractor - it looks like they alternated the male/female connectors so you can do this as long as you have enough hose length. I'm surpriised they used QC's, as they tend to add pressure drop and hurt the flow rate to the backhoe.
Also, if the 3 pt hitch is original to that tractor, I don't think it is a 4500 but rather a newer version. A 4500 would have a single lever to control the 3 pt hitch, with a separate lever to select draft or position control. The two levers you have allow you to blend position and draft control, and came out in '76 with the X600 ag tractors.
 
lfc is correxct. Thise are quick disconnects, and you should connect the 2 main lines to each other once they're disconnected from the hoe, and the y should all self-seal while they're disconnected. I agree that your 3 point control is definitely from a later model tractor as well.

Just to add a note. You should clean off all of the oil/dirt/gunk from those connections before you disconnect them, so you don't introduce any of that gunk into the system. Just a little bit of that kind of gunk can cause major headaches later.
 
lfc and Sean in PA, I really appreciate you taking the time to help me with this. I always prefer to try to figure out what I'm getting into before I start and get way over my head.

That's fascinating that you both think this might not be a 4500. It was sold to me (off ebay) last year as a 4500 and has a big "4500" stenciled on the side, but I understand from this forum that these old tractors are often misidentified.

IMG_0039.JPG


I had tried figuring it out before, but the numbers on the decal were partially destroyed and I had given up trying to decode it. So, based on your suspicions, I decided to take some photos and see if the brain trust here could figure it out.

IMG_0042.JPG


IMG_0029.JPG


Bottom, right of engine block:
IMG_0024.JPG


Right side of transmission housing:
IMG_0026.JPG


IMG_0027.JPG


Under seat (behind 3-point controls):
IMG_0028.JPG


Photo of 3-point controls:
IMG_0019.JPG

I've never had the backhoe off, so don't know if the 3-point hitch works or even how to operate it if it does work.

Just for the heck of it, I'll throw in the backhoe info also:
IMG_0033.JPG


IMG_0036.JPG


I tried using the [u:10ac240473]decoder chart[/u:10ac240473][color=blue:10ac240473][/color:10ac240473], but it didn't make sense to me. I always assumed that this was one of the last 4500s produced, probably a 1975. Looking at the 4600 serial number data [color=blue:10ac240473][u:10ac240473]here[/u:10ac240473][/color:10ac240473], maybe you guys are on to something. Did they make a 4600 with OROPS?

Anyway, I expect I'm going to get many expert comments on this.
 
It's a 1977 based on the serial number and all of the unit numbers. A "DD" is a 545, but my book shows it as a 312K, not a 212K for a diesel 6x4 manual reverser with transmission pto. maybe someone else can shed some light on this.
 
(quoted from post at 13:08:55 11/16/12) It's a 1977 based on the serial number and all of the unit numbers. A "DD" is a 545, but my book shows it as a 312K, not a 212K for a diesel 6x4 manual reverser with transmission pto. maybe someone else can shed some light on this.

I agree that's a 1977 serial number, but according to my documentation, DD1 and DD2 were model designators for the 535, not the 545. A 545 should be a DD3. The 545A was DD4 and the 545C was DD5.

The 535 was made from 1975-1978, which matches the 1977 serial number. The 545 was made from 1979-1983, so that wouldn't jive with the serial number.

The rest of the model number (DD212K) says that it's got a diesel engine, a trans driven (non-live) 540 rpm PTO , and the 6x4 manual reversing transmission.

The partial production code 7M?9B, depending on the missing number, says that it left the assembly line on either the 9th, 19th, or 29th of December, 1977.

Most of the casting numbers in your pictures start with D5NN too, which indicates that the castings were designed in 1975, so they would be for later tractors than the 4500 also.

I'm guessing that a prior owner didn't know what he had when he repainted it and stuck a 4500 decal on it, or I guess it might be possible that the loader itself was transplanted from a 4500, but it looks like the right loader for that tractor, the way the canopy mounts to the lift arm pivot point, so I'm guessing it's just the wrong decal.
 
Another point of information; Pretty certain the hoe is a 753, not a 755. Also be advised that with that 740 loader on and the hoe removed it will barely have enough traction to move itself on level ground.
 
Wow. I come here for some simple info about hydraulic hoses, and now find out that I've got a completely different tractor than I thought I had, based on an irrelevant part of a photo. Now that's a helpful forum!

Is the 535 really, REALLY similar to the 4500? I've got a [i:5c70a17967]Ford 3400, 3500, 3550, 4400, & 4500 Operator's Manual[/i:5c70a17967] and everything I've looked up has matched my tractor, once I found the right section. Also, any parts I've looked up on New Holland's website, such as filters, have been accurate. This is crazy. Hopefully, I've picked up a couple of dollars in value, not the other way around.

(quoted from post at 15:39:10 11/16/12) Another point of information; Pretty certain the hoe is a 753, not a 755. Also be advised that with that 740 loader on and the hoe removed it will barely have enough traction to move itself on level ground.

If you say so, I believe you. I've never measured it, mostly because I don't know what position it needs to be in and what the starting and ending points are. I understand about the traction. It may be a welcome change from popping wheelies and having no steering on even the slightest hills. :) I want to remove it mostly to gain access to change the hydraulic hoses and to find out if the 3-point hitch works or not.

Again, you guys have been very helpful.
 
That makes sense then - I forgot about the 535. Is there a list that has the model number for the post '75 tractors? I have my what must be a '79 book then as it has the 545, but nothing else.

I would agree that it is a 753 hoe. On the 755, the pins that hold the end of the boom and stick cylinders to the top of the boom are further apart. I think on the 751 hoe, they actually share the same pin. I have a 4500 with the 755 hoe, and it is very light on the front. The 753 should be better.

By the looks of the valve bank under the seat, it has a Gannon setup to give you full control of the 3 pt hitch top link and side link. Probably had a box scraper on it at one time.

Ford didn't change much from 1965 up through the mid 90's, so a lot of the parts will interchange.
 
(quoted from post at 19:17:25 11/16/12) Is the 535 really, REALLY similar to the 4500? I've got a [i:1594b6ca5c]Ford 3400, 3500, 3550, 4400, & 4500 Operator's Manual[/i:1594b6ca5c] and everything I've looked up has matched my tractor, once I found the right section. Also, any parts I've looked up on New Holland's website, such as filters, have been accurate. This is crazy. Hopefully, I've picked up a couple of dollars in value, not the other way around.

Lots of things will be very similar between the 535 and the 4500, but some things will be different. Look at the section for operating the 3 point lift controls and compare what's in that manual to what your 3 point lift controls look like you'll see what we were talking about.
 
(quoted from post at 22:04:23 11/16/12) Is there a list that has the model number for the post '75 tractors?

I have a PDF file that looks to be a scan of a copy of a copy, of a manual that lists model prefixes for lots of Ford tractors, along with the "advertised" model number that the prefix was for, the yeas of production for that model, what prior model it replaced if there was one, and engine type (gas, diesel, both) and displacement and bore and stroke. It looks like something a Ford dealer would use to look up information on a tractor if a customer brought one in for parts or service and didn't know what they had.

The funny thing is there's at least a few things that I know for sure are wrong in it, like it says that a D10 prefix is a 4000, but it claims that it was made from 1960-1964 and had a 172 ci engine. But all of the other 1965-1975 4000 series models it has correct for the years like the D11 for the 4110 LCG, and D40 for the 4400, D50 for the 4500, etc., except it calls the D41 prefix a 4000, but labels it as "Industrial" in the description column instead of "Special Utility" or even "Utility", as the D41 prefix is really the 4000SU. It also has 2 entries each for D40 (4400) and D50 (4500), and both entries of each show as being made from '65-'75, but the second entry for each incorrectly claims it had a 192 ci diesel engine.

There are some handwritten notes and corrections as well, like the DD1 and DD2 both originally had 515/535/550 typed in as the models, and the 515 and 550 were scratched out by hand on both entries.

It looks like the document was made in 1990 and pretty much covers all models made going back to the 9n and up to the xx30 series that started production in 1990. I'd be happy to send a copy to anyone who wants it, but as I said, there's a number of incorrect things in it, and that's only on the models that I know for sure what the correct information is, so there may be more incorrect info in it than even I'm aware of. I'm trying to put together a corrected list that at least has the corrections that I know to be true, but I seem to have run out of the precious commodity known a "spare time".
 
Sean,
I'd appreciate a copy of that list if you don't mind. I can compare it to my 1979 book and see if everything matches. Thanks for the offer.
 
Those "quick connects" are anything but quick. They were a nightmare to get apart and a nightmare to get back together. It takes two people pushing and pulling at the same time in a space designed for none. It makes me never want to take my backhoe off again. In an effort to fix a few small hydraulic leaks, I probably wasted the equivalent of 5 years worth of fluid that comes pouring out of those hoses when they're in any position except straight up. Live and learn.

IMG_0003.JPG
 

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