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76 D4D new toy with problems

C

Check Break

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Jan 21, 2012
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Un4gvn said:
And the blade is backwards! You pull back and it goes down. You push forward and it comes up. Now it's been awhile since I was on one but that not what I remember.
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That recoil spring can kill you if it gets loose. Looks like a bomb just waiting to go off. Is the bolt broken. Is there an inner recoil spring that's broken or missing. If the bolt is intact, best to cut the spring with a torch using the top track to shield your body until the energy is gone, then cut it up and remove it in pieces.
 
Nige

Nige

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Check Break said:
That recoil spring can kill you if it gets loose. Looks like a bomb just waiting to go off. Is the bolt broken. Is there an inner recoil spring that's broken or missing. If the bolt is intact, best to cut the spring with a torch using the top track to shield your body until the energy is gone, then cut it up and remove it in pieces.
Click to expand...
They don't call those things Death Springs for no reason.
 
Nige

Nige

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If you're planning on doing all your own repairs IMO the first thing you need to be on the lookout for is a Parts Manual.
There are three Serial Number ranges for 83J - 1 to 2176, 2177 to 3421, and 3422-Up. Yours falls into the second group and unfortunately that's the one that I can't find a Publication Reference for. Maybe OM can help.?
 
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C

Check Break

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C

Check Break

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I'd look for a Service Manual as well. Cheap info to keep you out of trouble. There were new aftermarket springs available before the crud. Once you have a part number, you can start looking. Used is a good way to go as well, and perhaps more plentiful. The issue is the track adjuster bolt that runs through the center of the spring. A used and stressed bolt won't last and I don't know if there's new aftermarket available.
 
Nige

Nige

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O

Old Magnet

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May 11, 2010
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Corralitos, California
Going back to PTO's....
Got much needed rain all day along with power outage so I'm running behind.
First picture is the control you would have for the interruptible PTO and #54 winch which is not present on this tractor.
7K400 PTO for #54.jpg
Next is the workings of the constant running non-interruptible PTO
There are no controls and I'll be damned if I can figure out where that shaft with the red arrow goes....comments please!!!
6P550 PTO Group Part #1.jpg 6P550 PTO Group Part #2.jpg
 
U

Un4gvn

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Nov 30, 2022
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Pine Bluff AR
Yes I'm going to do all repairs myself. I rarely ever hire someone to repair anything for me. The spring tensioner assembly is available new but is a little pricey. I know where a couple old broken D4D are that I'm hoping to pickup for parts. I always try to have a parts unit for everything I own. I have not found the correct winch yet. About 20 years ago my father and I got a bunch of stuff from a cat graveyard in southeast Oklahoma, does anyone remember this place or know if it still exists??
 
T

tctractors

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Oct 9, 2007
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Worc U.K.
Check Break said:
That recoil spring can kill you if it gets loose. Looks like a bomb just waiting to go off. Is the bolt broken. Is there an inner recoil spring that's broken or missing. If the bolt is intact, best to cut the spring with a torch using the top track to shield your body until the energy is gone, then cut it up and remove it in pieces.
Click to expand...
The recoil spring looks to be in good order with the odd shape it sits in being caused by impacted mud forced up from between the bottom rollers, if you look at the back stop welded to the track frame it has bent backwards, this puts the Hog's Back into the spring and can easily be rectified with fabrication skills that most Farm type chaps have, as for danger working around the spring well they have killed and injured plenty of people that failed to work in a safe way, I often fit new recoils and have the correct CAT tooling for this type of repair without any trouble, so if you stand in line with it and get hit don't be shocked to get a wound, the nut on the far end of the recoil rod is made weak by heating it so try to avoid that. tctractors.
 
E

epirbalex

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Akitio
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Un4gvn said:
Ok I'll pull cover later. Guys I'm not an amateur! I've been turning wrenches my whole life. I
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There would be a lot of people get a shock the day they open up that plate to fit a winch finding no PTO having purchased a winch first . There is an option to fit a hydraulic winch off a log skidder . Matching flow and pressure for your dozer to a winch the biggest problem .
 
U

Un4gvn

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Pine Bluff AR
Anyone out there have a parts dozer they would sell?
Where could I put a want ad?
Is there no classifieds here?
 
P

Puffie40

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Apr 5, 2010
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208
Location
Southeastern B.C.
Nige said:
They don't call those things Death Springs for no reason.
Click to expand...
I remember my dad building a monster of a spring compressor to disassemble the track adjusters on our D4D - 4 sets of 1-inch ready rod with a square of 1-inch steel plate on each end, with a hole bored out on one end to let the rod out. Once the spring was released he patiently loosened each nut until it was free. Definitely a rather tense couple of hours to relax all that energy.
 
D6 Merv

D6 Merv

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Coromandel Peninsula. New Zealand
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Self employed bulldozing contractor with a D6D D4E
DRAIN oil from bevel gear case BEFORE you pull that rear PTO cover off. . . .Otherwise you will need a bath. . .!
You will soon see if there is a PTO shaft in there.
OM that shaft you point to is a skinny wee drive shaft than runs down the inside of the transmission case. Its driven off the pump drive gear in the torque converter. It is direct drive PTO; ie power does not come through the torque converter.
And yes I have had these trans apart a number of times when i worked for NZ cat dealer. In aabusive situations this shaft can break. This shaft is also reason why you CANNOT just pull torque converter off the transmission in place
This is why you have to have a powershift winch. Because the PTO drive is effectivly direct drive you have to be abit more selective what you winching.
One I used to drive had a Hyster W5B winch, which is best winch for D4E IMO. Reason being by swapping 2 gears around you can have either 25-1 gearing or 40-1 winch gearing. Makes a big difference to pulling power.
W5A winch is just 25-1 can,t alter it. Cat 54 winch gearing is similar speed and power. But only has power in, brake on and brake off functions, no power out function.
I think UN4givn said he had a Hyster D4E winch he wanted to put on it. He CAN,T with this PTO setup. This is because D4E winch is a sliding gear winch, which is impossible to put into gear with constant running PTO.
 
O

Old Magnet

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Thanks Merv, I kind of suspected it was driven from the gear drive on the front of the converter but could not find parts detail to support my suspicions. Does seem kind of delicate for the application. Seems there are three different PTO possibilities. Parts book shows an arrangement similar to the 54 drive but states for other than the 54 winch application.
 
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