Hello everyone -
I'm a new member to this forum, and to owning a Cat D2! 
I just bought this gem for $1500.00. I'd love to know what year it is and any other pertinent info you wise folks might have. The serial number is 5J8341. Picture attached. I'm guessing it's a late 40's model?

Has a winch and manual angle blade. I'll send over some more pictures once i take delivery and get it into a more suitable area for photographs.
I do have all the sheet metal as well. Not sure if the rollover / roof is factory...

It appears to have a fuel delivery problem, i've got a parts manual ordered and will hopefully figure that out quickly. 

Glad to be here and will hopefully be able to contribute!

Welcome from Oz, looks like a really handy little D2 you have scored, well done, it won't take long to get her purring.
Mike

Wow! Thanks for the info. Very valuable!

I believe the fuel delivery problem is the gear that drives the fuel transfer pump (gear) located behind the cover in the front of the engine. I guess i need to see an exploded view of this area. Is this a worm drive gear that drives the pump? Name of this gear?

Thanks in advance

If you do a search of old threads in this Discussion section you should find lots of discussions about the fuel transfer pump you are referring to, obviously replacing your old fuel filters and cleaning the fuel tower is the first easy step, followed by checking the fuel flow from your fuel tank, then check the one way valve in the fuel transfer pump because they often have a broken or tired spring, or crud stuck in the valve.

Try the easy fixes first before trying to service that transfer pump, you will need some special tools to re-assemble it if you open it up.

Look back through older threads, I'm sure someone recently talked about working on their transfer pump, might have been on a D4 or D6.
Good luck
Mike

Thank you Mike -
Turns out the previous owner replaced the transfer pump (bought it from Cat). He told me he saw problems with the worm gear that drives the pump. If so, this is clearly the problem. I'll need to pull the pump and inspect the worm gear on the accessory shaft to be certain. 

If the worm gear is indeed ruined, the question begs why? I can only think that the original fuel xfer pump failed and seized... fun stuff

Appreciate your help, have a bit of a learning curve ahead.

-Todd

I had the transfer pump on my D4 do that, bend the worm gear shaft, I assumed moisture in the transfer pump, and years of sitting seized the pump gears, luckily I was able to straighten the shaft and re-use it, but had to dismantle the pump to repair it, luckily I had one of our top Forum members "Edb" assist with the job and he made me the special tools needed to fit the new drive shaft seals.

I actually pulled that pump off a year ago when that D4 suddenly stopped, thinking it might have happened again, it hadn't, but I had to make another gasket to mount the pump, and there is a trick to that, try everything else before pulling the transfer pump, if it was a new pump from Cat, it should be OK, that one way valve in the transfer pump body seems to give 99% of issues, either the spring is tired or busted, or the valve is damaged, or the valve seat has crud in it.  From memory I think those transfer pumps when new, produce about 15 PSI. 

The transfer pump drive shaft in my D4 pump is unsupported at the drive end, so it was quite easy for it to be bent if the transfer pump seized, looking at the parts book for the D2 3J/5J transfer pump, the drive shaft driving end, or worm gear end, appears to be supported in a bearing tube, so to bend that shaft would take a lot of force
Mike

Thanks for the info! Pretty sure the previous owner replaced the pump without understanding exactly what the problem was, i guess it was kind of the shotgun method. It was only after the pump was removed did he see that the worm drive on the accessory shaft was damaged. Again, i have not actually seen the pump off the engine so i cannot attest to the problem.

My plan is to get the Cat back to my garage and start investigating, starting with pulling the pump and inspecting both it, and the accessory worm drive.

I'll start a new thread after i find out something or need additional help.

Again, thank you for the info.
-Todd

remember the kiss principal keep it simple stupid. do the simple things first.

the first things i would do is change the engine oils, fuel filters and the coolant and dont forget the oil bath air cleaners. also prehaps drain the transmission and final drive oils checking for water and fillings etc if no water contamination you can reuse that oil simply pour it through a fine mesh filter funnel keep em seperate as they are different oils they should be a nice golden honey colour. same thing for the hydraulic oil.

its a very good idea to remove the starting engine fuel tank drain and clean it thoroughly old gasoline has a bad habit of causing problems.
it also a good idea to drain and filter the diesel from the main tank too a paper coffee filter works well for this. the strained diesel can then be returned to the tank.