D6B 44a

Also this Cat is direct start, what might it be worth?

Cat hydraulics too.

The sprockets can be renewed by cutting off the old ring and welding on new ones. If the tracks are already updated, instead of welding on a sprocket ring, the ring to carry the segments can be welded on.

The other way to change the sprockets is to have them pulled and the new ones of either type pressed back on. Usually this is reserved for when there are final drive oil seal leaks on the inside of the sprockets unless you can get it done cheaper than the welding. Leaks at the outside of the sprockets can be repaired without pulling them, but who knows how long before the inner seals may start to leak, so it may be best to bite the bullet and have them pulled if you have leaks.

Final drive bearings needing tightened can also cause leaks at the sprockets.

What is the part # to identify the pitch on the track chains?

6.75" pitch uses link #'s 2S5959 &60 (sealed)
6.91" pitch uses link #'s 3P7153 &54 (sealed)
Mixing the two leads to rapid wear.
You should also check the 5-pin stretched chain length.

[quote="Old Magnet"]6.75" pitch uses link #'s 2S5959 &60 (sealed)
6.91" pitch uses link #'s 3P7153 &54 (sealed)
Mixing the two leads to rapid wear.
You should also check the 5-pin stretched chain length.[/quote]

Old Magnet,
By the way I grew up in Watsonville. With the following pics what is you opinion of the undercarriage on this Cat. I do now know (thanks for the Part #'s) the tracks are the 6.75" links.
[attachment=31427]image.jpg[/attachment]
[attachment=31428]image.jpg[/attachment]
[attachment=31429]image.jpg[/attachment]
[attachment=31430]image.jpg[/attachment]
[attachment=31431]image.jpg[/attachment]

It's worn but still has ample life left. Need actual measurements to tell how much. Rollers don't appear to be hitting the pin bosses and front idler is well back. 5-pin stretched chain check is what tells the pin and bushing story.

What do you suppose this Cat is worth?