Dt 407 lubercation

Lex Carter · May 2, 2014

I need a little help with a DT 407 engine i seem to not have lubrication to the head after getting the block and head machine work done. i will give a quick over view. Rosa master pump seal leak caused rod brg to spin. I removed engine and dissembled i sent crank to be turned 10/10 new dry liners installed and cam brgs. The head needed all new valves, guides and seals. I assembled engine trusting machines failed to check cab brg! the # three brg was installed backwards covering an oil hole sending oil up towards the head, thinking i found out why i have no oil to valve train! i assemble engine again run it still no oil to valve train researching i find that # 5 rocker tower receives oil thru roll pin !! well i find that hole in the head is blind with no passage for oil. I need help to figure out why no oil to head or did my machinist swap out heads with me for the wrong head! Tractor Vet are you around and or refer me to some one for help.

showcrop · May 2, 2014

Are you checking while running or pressurizing the system?

Allan in NE · May 2, 2014

Do those engines have the "upsidedown" head gasket issue?

Allan

pete 23 · May 2, 2014

You are confusing me here. The oil supply to the head is through the external line going into front of head. No passages up through block to the head. Early model 361 were different from later model and all 407 engines. I don't have my book here to check right now. I think I am thinking right that the early model 361 fed off the oil cooler manifold and used an orfice in the elbow at the head to meter the flow and later models and all 407's used the cam bearing to meter the flow however they still used the pipe to head. So, if that is the case, your cam bearing is still plugging the hole needed for lube. You could then run off the clean side of filter base and use the orfice fitting instead of tearing engine back apart. I will look in service manual later and check this out a little farther.
Just run it a little and see if any oil is coming through to that elbow in head.

Lex Carter · May 2, 2014

thank you for your response the oil line on the head very well may be the problem. I was not there on the start of disassemble the engine this would explain the # 5 rocker shaft tower not drilled to an oil galley and # 1 rocker tower has a drain that drops oil into lifter area.

#3 cam brg was installed backwards and i have r&r engine made the guy who installed the brgs install a new one properly but now if i dint see the exterior line i would have plugged it off if the line was missing. And the owner had re plumed the oil pressure gauge used a new tee that never went anywhere and was not necessary until now. exactly where is the oil passage in the head i will hook up the supply line.

thank you very much Lex Carter

Lex Carter · May 2, 2014

while you are in your manual give me an idea of flow path from the front of head to rocker shaft. LOL I was going to drill and tap holes in the back of the head run a copper line inside tap head under # 5 rocker tower and feed lubrication if i continued to get stumped. i will be sure to tell ya how this plays out, its looking a lot better for the home team! lol thanks to you all.

Owen Aaland · May 2, 2014

(quoted from post at 13:54:56 05/02/14) You are confusing me here. The oil supply to the head is through the external line going into front of head. No passages up through block to the head. Early model 361 were different from later model and all 407 engines. I don't have my book here to check right now. I think I am thinking right that the early model 361 fed off the oil cooler manifold and used an orfice in the elbow at the head to meter the flow and later models and all 407's used the cam bearing to meter the flow however they still used the pipe to head. So, if that is the case, your cam bearing is still plugging the hole needed for lube. You could then run off the clean side of filter base and use the orfice fitting instead of tearing engine back apart. I will look in service manual later and check this out a little farther.
Just run it a little and see if any oil is coming through to that elbow in head.

I couldn't remember either so I got out the book to look it up.

Early engines fed from the oil cooler rear header were the ones that had the oil metered by the camshaft. They use the standard fitting with no orifice. Later engines that were fed from a block oil galley need the orifice type fitting.

pete 23 · May 3, 2014

The oil path is right out of oil gallery, same place pressure sender is hooked into. It goes in top front out side of head and through an internal passage into the number one rocker arm hold down. Feeds whole shaft from there. The orfice is in the 90 degree elbow at head. Original 361 fed from metered slot in cam shaft journal but that was changed by the time the 1206 came along.

Dt 407 lubercation

Lex Carter

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showcrop

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Allan in NE

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pete 23

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Lex Carter

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Lex Carter

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Owen Aaland

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pete 23

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