PTO problem? Gearbox noise Super major 1963

[Aleš63]

Hi thanks so much for your valuable advice! I'm currently waiting for a friend to have time to disassemble the tractor in his workshop. I took the engine cap off today and there was emulsion so I'd say my coolant is going into the oil. And I have one more question for you guys, I have a Seal leak at the decompressor lever. Do you know where to buy it? Or alternatively what are the dimensions ? I'd try to get one here. Unfortunately I'm from Europe and I only found it on order from America I think. Unfortunately, my Major has more problems that I have to solve... Once I get the gearbox sorted out I'll have to find out why my tractor won't keep revving... All of a sudden the engine starts revving itself up and then keeps revving at a higher speed. I have noticed that when it is cold, the revs hold normally for a while, but when I start doing something with it, the revs are still high and sometimes low again, and then the engine stops on its own. It just has an idle problem... I have a complete pump and injector repair kit so I'll probably take it to an injector pump shop. Thanks again for your valuable advice.

[Billy26F5]

That does look like coolant in oil, various things can leak the best test is to pressurise the coolant and look underneath with the sump off to see where it leaks. Fixing it will at least require a new head gasket, but could require a full overhaul. As for the decompressor seal go to a seal factor with the old seal, he'll make you a new one of high quality and with the correct sizes. I'm not aware of these seals being available. I recommend you service the injector pump (assume it's a minimec), and check for binding in the rack, any binding will cause issues with operation. If it doesn't improve easily you'll need to take it apart for a clean. Ensure no dirt of any kind gets in.
Sandy

[Aleš63]

Hi guys today I disassembled and then reassembled the entire transmission I recently purchased. The transmission including the bearings looks to be in perfect condition. I then opened up the side section on the tractor to see if I could see any problem in the transmission that is currently in the tractor. I tried moving the gears to see if I could feel any play and visually checked the bearings but found nothing. Overall I think the problem is on the side where the PTO is located.But I found a large amount of metal particles in the other part but as I said visually I didn't see anything or I am blind but I will add some pictures here and maybe you more experienced people will see the problem right away.However, I hope to replace the gearbox in two weeks and find out more. I have one more question for you and that is about the speedometer cable and the minimac pump. Unfortunately my speedometer is not working and probably because the connector in the fuel pump is destroyed. Is there an in between piece and or does the square part of the cable stick right into the camshaft?The last two pictures are the fuel pump speedometer cable connector. Thanks a lot for the help

[Billy26F5]

The short answer on the tachometer is new camshaft. A big job which requires full phasing and calibration. As for the PTO issue, the metal fragments are a concern, and you'll need to remove those before reassembly. The condition of several gears is a bit doubtful with rust perhaps contributing to trouble (but not significantly). Having said that, I don't think that is the problem, I still think you have a poor bearing somewhere, probably one of the ones that are more difficult to see without dismantling. After the swap you should see what's happening, hopefully find something in the gearbox you just removed. I recommend you strip it to check that and see what you find, possibly before reassembly, just in case.
Sandy

[Old Hywel]

Rather than replace the injection pump, there’s probably some type of metal filler available to build up the square drive. Make sure that neither cable nor instrument are seized before refitting.
When the tacho stopped working on a Super Major, I jammed small slivers of wood around the worn square as a temporary measure. It lasted for years.

[Billy26F5]

Davie has the same treatment but with metal, although it's the cable that's in trouble, and I'm hoping to get one some time. As for Ales' pump the squared part is actually broken off, which is why it most likely requires a new camshaft as I struggle to see an easy fix without damage. The squared part sticks out some 3/4" from the rear cover, the pics are with the adaptor removed showing the rear seal.
Sandy