Rear end casting - what material?

[arctic003]

Hi folks!

Does anyone know what material the rear end (rear axle casting) is made from? Is it cast iron, cast steel, or what, exactly? My tractor is a 6945 of 1978 vintage.

I ask because I have a.. crack in mine, on the underside where the longitudinal supports for the trailer hitch (etc) assembly bolt to the underside of the tractor.

I find out the material compostition so that the welding specialist can plan the repair. Also handy to know would be the material that the longitudinal supports are made of, as it may be that we have to extend one forwards, and drill and tap additional holes into the casting.

The good news is that the crack doesn't seem to be getting worse - just as well, because the tractor is in use all day every day at the moment.

Thanks in advance

003

 

[markku]

Cast steel.

You can be sure if you make a test. Just grind the part with die grinder or something. If the sparks are white, it is cast iron, but if they are yellow it is steel cast.

Well well welding.........

Welder must be specialist. Zetor steel cast has quite a lot garbon. It is also very hard material. If you want that welding will be OK the part must be heated before welding up to 200 to 300 degrees. You know the temperature right when you gring surface clear and you can see when it gets brown-yellow the steel is about 230 degrees.

After welding it must be cooled very, very slowly. So it must be heated after welding or you must wrap the part after heating and welding to some insulate. One hours would maybe be OK.

And the happy end....

Even the tractor would be mine and I have equipments and knowledge for welding like that I would buy a second hand sparepart for that purpose.

 

[arctic003]

Thanks very much Markku!

I have been keeping a watch on the crack and so far it hasn't got any bigger. I have another load of manure to take to the field today and then have about 3 hectares to harrow. After we get this field seeded we should hopefully have time to do this repair...

Many thanks again

003

 

[markku]

Whew...

I got seeded the last field this evening. I am tired. This hole season started by about 120 loads of muck and manure. Then 3 times with harrow and finally seeding. Tomorrow Im going to begin washing and tidy equipments and Zetors offcourse!

But now getting seed trailers back home...

 

[arctic003]

Sounds great Markku!

Very good to hear that you have that all done.

I thought that I was having a hard time with just 9 loads of manure! But well, we do have an hour each way to drive to the field..

Tomorrows job was going to be harrowing, but I think it has been raining heavily there this evening - I must send a text message to my friend and ask - don't want to spend two hours driving there and back to find out that it's too wet

Axle casing still hasn't fallen apart by the way, and I have found a chap who can fix it!

 

[arctic003]

UPDATE:

Well, I've been keeping an eye on the crack. Since noticing it, I have
harrowed 3 hectares of heavy clay, as well as shifted a huge amount of rocks with the mother and father of all grader blades (front wheels remained on ground, but it felt like only just ).

The crack is just as it was, ie it doesn't seem to have opened at all. So at least I am confident that it will hang together while I get the rest of the spring work done...

Best Regards

003