theakerstwo

I think your right.;

And on top of that if you get in there and find a pin broken in one of the synchro plates then look for a drive line virbration. If air ride the ride height could be off causing the ujoint angles to be off and causing a virbration. But broken pins is from a virbration. glenn

I see a old Chief freight lines trailer there in the photo.They were located in Tulsa untill they closed their doors. I worked with their old service manager untill his Death about three years ago.

Rob my wife said this looks like Dogs wife the bounty hunter.

cummins will some times but the way it acts is it will be a dead spot but if you give it enough time it will set a code.Cummins like the cellect was slower than the new ecm. glenn

Sorry i would be glen akers from tulsa okla.

There should have been some TPS codes showing that the throdle was down.

85w90

It sounds like the splitter is slipping out of gear on a coast. It should have a grinding noise in it but it is not the cltutch so it is a matter of breaking open the trans and looking at one of the air shifts.

It is a big cost like about 14000.00 to inframe the engine.

Done many that way . Grind alittle and then mic it and i install and tighten and check. i try to get no load no slack but better to have a little load .

If the puff limiter is set like it is to be it will not kill power on top end but will slow the responce of the getting up to top end down some and kill the smoke and keep the black out of your oil longer and surely save some fuel. Cummins was the same way and alot a guys would set the no air screw in to were they could get smoke. Like some one already said if disconnecting the air line helps on power then the air relay will fix problem.

If that is a bendix that is on it now that is leaking back then you should be able to get a unloader kit and a discharge vale kit and i think that is called a feid service kit and you can put it in with out pulling tha compressor off. It may be be a tuflow 500. A tuflow 501 will replace it.

And another thing a injector tube or sleeve will not let fuel to get into the oil or into the Cylinder. But a leaking injector inlet tube copper washer will let fuel into the oil and if bad enough could make it miss. That is common on a 743 engine.I am sure the fuel pump could do that also.

Some times you will run into a 1700 rpm engine and it will have a different gear ratio on the oil pump drive gear so it will have enough pressure and then when you set them up to 2100 rpm they may have 100 psi. I have one here now that cares 90psi when hot but have not worried about it. It was a mix breed engine so it may have the wrong oil pump but it will be ok.

Your right and that is the cadillac of trans if you have a 237 0r 285 engine for as the 12 speed goes. I like it because on a long pull you can cut the rpm back some.

Yes and you can hear it coming too.

Glad Tony Came back At the garage!They would hav lost a true talent had he stayed away. Yes you are right that guy knows cat. We have a cat rep. here like that that knows the data on cats but only learned it from the manual instead of working but is a good scourse for info that is not in print but makes good sense when he gets you to think. That some times is what people need is just think about it some. Talking about timing pumps i have a snapon timing light and a clamp on fuel line moduel that will work on any diesel injector fuel line that i like to use on engines. I use it here at the house on cat engines to check the advance. I have checked it on a good timed advace using the cat tool group and then this light and the best i can tell it is 2 degrees slow slow i try to remember that and go with that. never have used it on a mack but have on cat alot. glenn

My brother had a dozer that he repower with a 5.9 cummins so he said that where he got it they told him they could not start it. so he said i fix. He pulled the pump and sent it to pump shop and it was found to be ok. He installed and still no start. He pull pump again and said check it out some more. This time he got a paint job and a bill cause they had over looked some thing. I had told him to tell the man that was to work on it to check the timing . It was a 7100 p pump.He install and no start. He pulled engine because it was easy and brought to me. We check and by pulling the injectors and i connected one to the # 1 fuel line and as we turn it over it was injecting fuel on the bottom of the stroke. I told him to pull and take back and to tell the same man that checked the pump timing to call. He never did call but told my brother that the tone wheel did slip. That was hard for them to exsplain why he had it in there 2 times and never checked the timing to the cpl. That is the first thing that should have been done.

Both ways of timing is great and the end is the same the only thing with the hipressure pump way is it is and so many guys is not clean with the other way of timing and will get dirt in the fuel system. But the end will be the same. For many years that is the way mack recomened to time and that was called port closing by Bosch. The electric pump came out in about 79 or 80 and was so simple for some but we all dont got one.That is the same way with timing the robert Bosch pump you can use the light or buzzer or you can use the little plastic indicator like they had years ago and now cummins is using it on the 5.9 and 8.3 engine. The light is better only because the plastic indicator can break easy and it is about 70.00 to by. The one thing you need to remember about the electric pump is if you have a barrel and plunger that has a lot of wear on it it will take along time to shut off and that could cause you to set it too slow on the timing. glenn

Rob years ago when i worked at the mack dealer here a customer that who come in at night and let me work on his truck, God bless him, but he wanted straight 4" stacks on his F model with a 864 non torbo. we put two ricker mulfflers on bottom because i told him the lttle short mufflers would sound better and sraight pipe up to 13ft. At 1800 rpm it had a purr i liked but you slowly run it on up to 2000 rpm and it would break glass. You could run the rpm up and down 200 rpm and it would i mean bark at a certain point. The hotter it got the more it would bark. I have to say that for noise from a stack i want two little glass pac muffler as close to the engine and as much pipe afterwards as i can get. A 220 or 250 sounds good like that and i had a 673 non turbo in my camper years ago like that i i could get going on that . I miss those old engine sounds but for me driving one i want one i cant hear. I am dealf now but i want the exhaust quiet were i can use the jake brake with out getting in trouble.

Welcome to the site and i know you will like this forum, I hang here my self and dont get in the way much but dont have to much to say but enjoy reading. I started working on macks in 1965 and the 864 was in production as well as the B model truck. I wish i had taken some photos of that time frame but did not.The 865 was a big inprovement over the 864 and better power also But enjoy the site . glenn

Replace with a D2 bendix.

Yes

I dont know what they look like but if they are straigh then a B model can be shorten as well as a straight blade on a freightliner or pete. I have done this for my B model by sawing off the ends to the right length. There is a parts store in Rome Ga that sells parts like that and motors also and i can find his # if you need it. glenn