rhasler

I saw a couple of these a few years ago. I think they were 415 horsepower, but can't remember for sure. I know they didn't have the Holset VGT turbos, they had the volvo EPG behind the turbo. I think it's just because the MP8 is the only engine being used in export chassis.

Jerry, have you ever posted the serial number from your B73 here? You never know when someone might run across it.

Good advice as relates to a manual engine, however in the 2004 chassis the engine is fully electronically controlled. The VECU sends a command to the EECU to activate the engine brake based on throttle position, engine brake dash switch position, and clutch switch position. The EECU sends power to the engine brake based on the VECU command. Fuse 16 in the cab powers both the engine brake switch in the dash and the clutch switch. Check both of these switches for power on the wires from circuit 16. As indicaated earlier, make sure the clutch switch is adjusted properly and that it is operating correctly.

Now if only Randy had a cat stationed in a nuclear sub out in the Gulf...

Now that is some grade A Photo doctoring right there, makes me look kinda sophmoric.

I agree, looks pretty good already. I have a couple of numbers that might help you out. I don't know the dimensions of any of these parts or the material they are made of but it might be a starting point for you anyway. These are numbers listed for a CMH chassis, probably with an MP8 engine. The snorkle/hood part number is 25098434 and the pipe that connects to it is 21544568. The mounting arrangement shown is likely quite different than on your truck, there are several elbows, etc. shown for the CMH. I'm sure that with a little bit of modifiction these would work.

Yet another of Spot's encounters with wildlife

I've heard of mismatched ratios being very close so that under normal circumstances there was no problem, but engaging the power divider would cause all kinds of problems.

I talked to one of the Mack instructors who had been down to Venezuela recently and got to see two AC chassis, one was running, the other in need of magneto repairs. Both trucks were in good condition, much better than I would have expected for the region.

Double Great Googley Moogley!

Great googley moogley!

Here's the EPDM, #49 supplies power to the EECU. On an ASET AC engine power from the fuse should be present at connector EJ1, pins 2, 3, and 5. The EECU is grounded at EJ1, pins 4, 7, and 8 and EJ2 pin 18. EPDM.pdf

I talked to our ABF driver today. He drove one of the new trucks for a few days and was pleased with it.

The engine has to be able to communicate on the J1939 or the J1587 datlink to run properly. If only one is operational the engine should start. The oil pressure guage is fed by the J1587 from the engine, for it to read 0 would seem to indicate that neither datalink is connected to the engine ecu. You may have a power relay that is sticking and keeping the modules from powering up correctly. I've also seen this happen when the harness rubs through near the VECU. If this is the case the instrument cluster will read "no info"

Kinda partial to the live version of "Wreck of the Ole '97" from the San Quentin album myself.

Mack Trucks-still manufactured in the USA, lots more "global" parts than in the past though.

Well you must have a good camera and good eyes, cause it looks like you've done a heckuva good job there!

The software and datafile in the EECU need to be changed to those for the 460 engine

Yes sir Randy, they are tools that in my opinion are a perfect combination of form and function (in other words they're bootiful). A quote from Mr. L.S. Starrett: "I have believed that I could do no greater good than help create a business that would give people employment and a chance to earn an honest living"

As far as hand tools go, I got off of Craftsmen tools years ago due to the aforementioned lack of specialty tools (at least for HD usage). The last I saw they were offering several specialty tools for automotive purposes. These were mostly made by other tool manufacturers (I believe at the time Danaher, the owner of Matco). I currently prefer Proto and have for years. Although their specialty tools are limited, their HD tools are very diverse. Now as for precision tools, there is only one tool in my mind: Starrett. I could sit and stare at their guages, indicators, and measuring equipment for days. Luckily an old family friend is a salesman for both Starrett and Proto.

The real question here is what the grill that burned the turkey is powered by

Found this website last night, he has some nice paintings of some old trucks including Macks. Thought it might be enjoyed by all. http://www.alanbull.com/

The engine shutdown light (red X) sounds like it may be related to a low coolant level. When going down hill the coolant is probably sloshing away from the sensor. This may have something to do with your other problems (fan engagement, etc). The fan is just loud naturally.