CAT 12E grader

Doug, many of the older Cat pistons were the two piece with the top screwed to the lower half & indeed they had a problem of either getting loose or coming completely apart, seen many of them do it years ago.It was a mistake of engineering.

My D333 87B1-up industrial engine manual shows:
1-7S9439 (main thrust)
6-3S9730 (mains)
Rods:
7M7821 - std
2S502 - .010
2S503 - .020
7M7826 - .030

The rod bearings are listed with the piston/rod assemblies in the parts manual.

Be better to check with parts manual for actual unit or the D6B 37A1 & 44A1 which I have service manual for but not the parts manual.

😄 😄 It's loose!

Tried it again this afternoon with the long cheater pipe, just for grins and it moved a little😄 I did notice a sledge hammer sitting nearby and found out that my uncle had done some bumping on the "spud wrench" I had bolted to the crankshaft pulley. He didn't think he had done any good, but apparently he had jarred something loose 'cause one of the cylinders had drained some of the ZEP and it was a little lower in the combustion chamber in the piston.

Once I was sure it was going to really move, I stopped and honed what cylinder wall I could get to with a flat stone type hone. Then turned the crank to get each piston to the exact bottom so the hone could reach the whole bore. When I got through with that, I went to a long pull handle on the crankshaft pulley bolt and turned it through a couple of revolutions to push all the lifters up. I expect they are going to be a little hard to remove to get the cam out. I'll keep spraying with the ZEP and maybe they'll be ok. The ZEP seems to be pretty good stuff.

I has wondered how the crankshaft pulley, it's key and the "weak" end of the crankshaft would stand up to this treatment, and so far it seems to have survived with flying colors. Found there's no crankshaft pulley key, it's a taper fit with a special doweled washer.

I had to fab a better puller than what I had, and when I finally got enough pressure on it and it dropped off the taper, I thought I had broken something. I was expecting a long pull off a straight keyed shaft.

Next is to pull engine and finish tearing it down so we can have the crankshaft and rods checked. Then we'll know if we need a parts engine or just some parts😉 Keeping my fingers crossed! I'll get with the local CAT dealer and find out what the bearings all are. They sold them, so they should know what they fit😎

We're a long way from worrying about fuel injection yet, but does anyone have information about what part number the injector "valves" are in the service kit of 6 for this engine. I have some for the D330C, in fact I have 8 new ones and 4 used that were good, but the part number for the service kit is obviously different for a 4 cylinder vs a 6 cylinder engine, so I wonder if the valves are different or it's just how many there are that is different?

😄 😄 It's loose!

Tried it again this afternoon with the long cheater pipe, just for grins and it moved a little😄 I did notice a sledge hammer sitting nearby and found out that my uncle had done some bumping on the "spud wrench" I had bolted to the crankshaft pulley. He didn't think he had done any good, but apparently he had jarred something loose 'cause one of the cylinders had drained some of the ZEP and it was a little lower in the combustion chamber in the piston.

Once I was sure it was going to really move, I stopped and honed what cylinder wall I could get to with a flat stone type hone. Then turned the crank to get each piston to the exact bottom so the hone could reach the whole bore. When I got through with that, I went to a long pull handle on the crankshaft pulley bolt and turned it through a couple of revolutions to push all the lifters up. I expect they are going to be a little hard to remove to get the cam out. I'll keep spraying with the ZEP and maybe they'll be ok. The ZEP seems to be pretty good stuff.

I has wondered how the crankshaft pulley, it's key and the "weak" end of the crankshaft would stand up to this treatment, and so far it seems to have survived with flying colors. Found there's no crankshaft pulley key, it's a taper fit with a special doweled washer.

I had to fab a better puller than what I had, and when I finally got enough pressure on it and it dropped off the taper, I thought I had broken something. I was expecting a long pull off a straight keyed shaft.

Next is to pull engine and finish tearing it down so we can have the crankshaft and rods checked. Then we'll know if we need a parts engine or just some parts😉 Keeping my fingers crossed! I'll get with the local CAT dealer and find out what the bearings all are. They sold them, so they should know what they fit😎

We're a long way from worrying about fuel injection yet, but does anyone have information about what part number the injector "valves" are in the service kit of 6 for this engine. I have some for the D330C, in fact I have 8 new ones and 4 used that were good, but the part number for the service kit is obviously different for a 4 cylinder vs a 6 cylinder engine, so I wonder if the valves are different or it's just how many there are that is different?

I am pleased to see that somebody else is using ZEP and knows how good it is.ZEP has saved my hide many times over the years since I started using it.
I have had a problem finding it so I buy it from the local ZEP distributor and he ships it right to my house.I always carry a 24oz can of ZEP45 wherever I expect to be doing any mechanical repair work.Ron G

Ron, I have to agree that it's good stuff. I didn't take any "before" pictures, but this grader had been sitting out in Alabama weather (50 some-odd inches of rainfall/year) for several years with no head and no cover. Every cylinder was full of rainwater and severely rusted. I used the ZEP 'cause I needed to go ahead and get it torn down. Lucky that there were 2 pistons almost at the top of the stroke, 1 missing, so that left 3 with a lot of the bore exposed to rust.I don't know if I will attempt to reuse the sleeves, probably not.

I would have liked to try some of the wilder concoctions and household remedies and see what really works. Well, I know 1 thing that works! 3 days soaking to get this thing loose is pretty good.