theakerstwo

The maxidyne was the first mack engine to use the fire ring for sealing compression in the head gasket.Also the governor was different from the ENDT 673 B and C engine so it would be able to fuel more at 1200 than it was at 2100 so the torque rise was more that the early engine.No the valves and heads was same as the ENDT 673 but had the fire ring grove cut in the surface for the fire ring.Later engines in the ENDT673 started to use same head and gaskets.Same block.

I was working for Freightliner then and some fleet had some of them here.I can not even remember the fleet now.

I remember this and the first cummins i saw with the 5 speed was in 1968.This did not catch on vert well.The engine wa a NHCT 270. Or something like that.It was a slow timed engine and some of them was nothing like a mack maxidyne.One i remember putting a 10 speed in it and retiming it so he had some power.I never knew of cat dont any thing like this.

And on the maxidyne block if you added too much fuel to it it would disturb the main brg aligment or crack main brg bore. also Larry in cummins school years back they told us to never turn in a warrany claim if it had a Fram brand filter on it.Some of the 5.9 had problems with them collapsing and letting debris passing thru and stopping the flow thru piston cooler tubes.

On some of the older mack engines they use a pressure regulator valve in the oil filter mounting pad were the oil comes out straight from the oil pump which did not regulate the pressure at the pump.There was a port there i think it was 1/4 pipe that was on the pump side which has not been regulated yet.It was nothing to see more than 100 psi if you connected you gauge to it.The pressure gauge was to be connected to the other port which is reading the pressure after going thru the filter and against the regulator and will be in the 60s range.It takes alot of pressure from the pump to push oil thru the filter and before it is regulated.I have seen this happen before were some one is reading pressure from the wrong port.If i remember right mack came out with the gauge connected to me in the wrong place.When you have the gauge connected after the filters you can read pressure lost from a stopped up filter.

If high oil pressure is good then cummins didnt get it right when the Big Cam 2 came out.Big Cam 2, 3, 4 all use 35 to 42 psi of oil pressure.

Were is that sitting?I keep thinking i have seen it.

Mack sure its not a wheel brg froze up.I saw this happen a few years back when a man was working on his truck and found the brakes was stuck.Two days later some one ask him to check for a bad brg and bing go.

I use a universial sendor made by stewart warner.That sendor is adjustable.

I remember on a DD 3 you could install a resister on the manifold pressure sensor and gain some response but on a later version they set it to were the ecm had to see so much vehicle speed.Yes mack trucks paid a large fine to EPA.Cat just passed the fine on to the engine buyers.

I think most people that i know think also it was rigged but now we cant do any thing about it.Maybe later.

And if your rack will not move then pump needs to go to pump shop.Then look in the bottom of fuel tanks for water.

I know your right

If it will still idle and idle with out any missing then it may have a stuck rack.But do as JOJO said and make sure your linkage is ok and the lever is ok.And to make sure you have fuel pressure you need a gauge on it.If the pressure has dropped enough to cut the rpm back it would be cutting out and not idling good.Last check is pull top off of governor with engine dead watch the rack and pull the stop to kill and then release it to the run position and then push the fuel lever in full fuel position and watch the rack move in and out.

What i dont understand is how did Biden get elected when now no one will claim that they voted for him.

That is normal reading.

First thing is get some one to read the ecm for old codes.

Freightliner manual with cummins says 10 with a hi flow engine and with a Big cam low flow you would cool as much as 45degrees.

I think if you cool your coolant 10 to 15 degrees your safe good.

Did you get them bleed out good?

Poat a photo of the bottom of the housing please.

I found year back safety first and some times thats not enough.Once it falls on you its too late.

I had a extended reverse mack 18 speed and the thing i didnt like was it was geared to low in reverse.It would be ok for some jobs but if you have to back up very for i would use it in hi range.

We never supported the rear because you want the rear of the trans to drop a few inches so it will let the front of the engine raise up enough to clear the front crosss member.If i fork lift it out of the shop i put a chain on the rear of the trans.If the trans drops down much then the mount bolts may be loose.Yours is quad or triplex so it may drop down more.Its been 40 years since i have been around a quad or triplex.I had a 18 speed maxitorque in mine and about 4 months ago me and my son change the engine and it did not drop down no more than what we need it too.Its in a Ch and they are so easy to change.

i think this was a statement instead of a question.