oil gallies in 3406 block

caterpillar guy · May 5, 2017

I'm looking for either information or pictures,of oil galley locations on a 3406 cat cylinder block, for sender unit and Murphy switch. I have the one on the left rear end of the block. I can't tell if the next plug forward, is also just a plug for oil,or if it is something else. By the looks of the plug, I'm not sure if it is an Allen head plug or not.

MikeJM · May 6, 2017

There are many on the 3406, what model do you have? A,B,C or E?
Most plugs should be o-ring boss, there might be some pipe plugs but I'm not sure, I can look later on my B or A model if I remember

caterpillar guy · May 6, 2017

Mike the one I have in use is pipe thread. I was hoping the next place was just in front of the one I am using now.

MikeJM · May 6, 2017

I'll have to lift the hood when I get home, I should remember seeing as I did an overhaul a few years ago, I think there is an oil galley on both sides of the engine, I have to check.

MikeJM · May 6, 2017

I looked at the one engine, there are only oil ports into the main galley ports on the exhaust side of the engine, the rear most looks like o-ring boss and the rest are pipe thread either 1/2 or 3/8.

caterpillar guy · May 6, 2017

Thanks Mike I'll have to look at some of them. This is on a B model.

oil gallies in 3406 block

caterpillar guy

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