Track Chain Question.

Hi Tony,
Looks like a no go to me......all the component part numbers are different and even though they both are 6.75 in. pitch the sprocket tooth count is off by one tooth.

Can get numbers if you need them.

Thanks for the info O.M. I had a feeling the link pin and bush might be incorrect although the pitch is good, I have a man looking for a set of 941B chains and know they are the D4-6 3/4" pitch, the rims I have are off a 951B I did not think they would be any good, the intension was to weld on the correct 941 rims, but if its all a bit different I will scrap them sadly.
tctractors

would they fit a D4c :noidea: instead of going for scrap 👍

cheers graham

Hi D4c, I would not think these chains are any good to you, as they have shovel pads screwed on them, I dont know the bolt size but standard on 951's was 5/8", early D4's had 1/2" then things moved onto 9/16" finaly getting to 5/8", I sort of have it in my mind that D4 and 941 chains are the same, drilling plates is a right ball ache that I try to keep clear of, but you are welcome to come and view the merchandise.
Did you make it to the sale yesterday, I was mad keen to go, spending hours hunting out the back of the sofa for lost coins to make up a £5 pound note, but sadly I was tricked into going to repair 2 Moxy dumpers, all the 1 needed was a driver with a brain as he did not know how to release the hand brake, this realy ticked me off so tomorrow I might strip out the transmission on the other one, I will let you know how they get on for giving me a doggin???
tctractors

Yes, the 941 chains are the same as the D4c (39A, 40A & 78A1-2523). They use the same sprocket rims but the sprocket assemblies are different. The 941 uses 38 sections, the D4c 36/37. Can be an assortment of track bolting sizes as tc mentions.

[quote="tctractors"]Hi D4c, I would not think these chains are any good to you, as they have shovel pads screwed on them, I dont know the bolt size but standard on 951's was 5/8", early D4's had 1/2" then things moved onto 9/16" finaly getting to 5/8", I sort of have it in my mind that D4 and 941 chains are the same, drilling plates is a right ball ache that I try to keep clear of, but you are welcome to come and view the merchandise.
Did you make it to the sale yesterday, I was mad keen to go, spending hours hunting out the back of the sofa for lost coins to make up a £5 pound note, but sadly I was tricked into going to repair 2 Moxy dumpers, all the 1 needed was a driver with a brain as he did not know how to release the hand brake, this realy ticked me off so tomorrow I might strip out the transmission on the other one, I will let you know how they get on for giving me a doggin???
tctractors[/quote]

Tony i was all set to go to the sale on saturday but ended up working ,planned on little casterton today ,but ended up with work again
my plates are 9/16" and was thinking it may pay to get some spare chains if they came along ,mine are around 90% good ,but you never know a big contract may come in 😆 if you think they may be worth saving ,i will delve into the depths of my sofa and look for some coins for you 👍

i thought i had read in a track guide somewhere ,but was not sure

cheers graham

Bit of an odd thing I spotted today, the 951B that I own, has been modified to the 6.91" pitch track groups with the correct mod on the sprocket, all the iron is genuine CAT, the tracks are hardly worn and look as new, but the sprocket does not seem to hunt in the chain, in other words the bush does not wear all the teeth on the rim, I have checked the part No's on the links and the rim and they are correct, this shovel serial No is 69H1674 so it started off with the D4 pitch chain, its something I have never spotted before???
tctractors

It's all in the sprocket tooth count, needs to be an odd number of teeth to be a "hunting tooth" arrangement. For the even numbered tooth sprockets at some point you will have to jump a tooth to get all the wear out. Not many have even tooth counts, but the 951's typically had a 30 tooth sprocket, even in the 6.91 pitch arrangement. The D5/6 6.91 pitch uses a 27 tooth sprocket so hunting tooth is incorporated.

Hi TC,

those 951B tracks you have do they have good 15" triple bar grousers with 5/8" bolts ? are the track plates good ?
I'm looking for a good set of track plates for my late 955E 12A7174

Hi Old Magnet, the part # for the 955 track plates is 1M3016 do your books tel you what machines these fit?
i'm thinking they may also fit some 951's


shovel man.