rhasler

ou might be able to check to see if one of the differentials is getting hot after driving it. You might see something if you pull the axles and look at the splines. If you find anything wrong with the rear ends make sure to check the tires and make sure they are matched in size.

I had an experience where someone installed one on a Mack T300 transmission and it did the same thing. Seems like it was building too much pressure in the case of the transmission and pushing oil into the range valve causing it to push oil out of the valve's cover.

I've seen a few trucks in the last year or so that had leaking injector sleeves in ASET heads, allowing fuel in the coolant and vice versa. This is something I had never seen happen since the introduction of the 4 valve heads on the E-6 engines. It doesn't seem to have been a predominant failure, as it has been with some other engines.

It's probably the AL or AL II (Hendrickson HA/HAS) suspension using the dimensions quoted earlier. Make sure when measuring frame height that you measure from the top of the upper flange to the bottom of the lower flange. AL ALII Suspension.pdf

The CHN, CXN, CHU, and CXN with 10.47" frame rails (built March 19, 2001 and later) uses 4 7/8" +/- 1/8". Make sure of which suspension you have. There are 10 different suspensions that ride height specifications are given for (including the Hendrickson Airtek front axle suspension).

Not quite the same. The spring will sit inside of a bracket that sits on top of the axle housing, so the distance to the top of the axle will be greater. I believe I forgot to mention that there is an 1/8" tolerance to the specification.

Schawing

Haven't heard a peep from him lately. He may be deep sea diving for that lost oil out in the Gulf.

A subscription to volvo/Mack PTT is $450.00. The recommended communication device is somewhere around $600.00 if I remember correctly. There are aftermarket communication devices that seem to work pretty well (based on my limited experience with them). The problem is that PTT is "glitchy" when using it on older trucks (VMAC I, II, and III). New trucks (US 2010 emissions) are converting to HDOBD, which uses J1939 protocol. I think all manufacturers had to have a compliant engine by 2010. Mack doesn't have an HDOBD compliant engine at this time, all of the MP engines are partial HDOBD. The D13 475 is the compliant engine manufactured by volvo, which puts Mack in the clear. By 2013 the MP engines will be full HDOBD. Reading codes from the J1587 datalink on a 2010 or newer truck will not give any emission codes because those codes are transmitted on J1939. Along with HDOBD there is legislation, I believe it is called "Freedom to Service", that requires manufacturers to make available to aftermarket suppliers certain information so that repairs and tooling can be obtained through venues other than the dealer/distributor body. There is currently an aftermarket scan tool called the HD Reader that reads faults from J1587 and can be used on all makes of heavy trucks utilizing J1587 protocol. Sorry Thad, long answer to a short question

Pin A-Serial link (+) Pin B-Serial link (-) Pin C-12 volt (+) Pin D-Accessory Relay (+) Pin E-Chassis ground Pin F-Not used

That's kind of what I thought too, differential spider/side gears maybe. Didn't want to ruin his birthday, have him tearing his truck down all day though.

Is it an E-Tech (with 6 individual fuel pumps) or an E-7 (with a single inline fuel pump)?

Happy Birthday QC, hope it turns out to be a good one. Like Hatcity said, check the fluid levels. Check your front cab mounts and see if it looks like one side is sitting closer to the frame bracket than the other. Check the engine and transmission mounts too.

You will have to remove the Jake Brake assemblies and the spacers to remove the injectors. The setting for the Jake should be .021".

You may have bad o-rings on the injector body that are allowing oil to enter the sleeve on the line and consequently leak at the fuel line nut on the cylinder head. No timing is necessary to install the injectors, just make sure the pin in the injector body lines up with the slot in the sleeve in the head. Intake lash is .016" exhaust is .024". The engine probably has a Powerleash and not a Jake. Settings and adjustment procedures for the Powerleash are different than on a Jake. If you have a Powerleash and you remove the rocker assemblies REPLACE THE BOLTS.

Mack says 4 1/4" for 11.81" wide frame rails and Mack AL and AL II air suspension (Hendrickson HA/HAS). Measured with chassis unloaded, at the front axle housing, from the bottom flange on the frame rail to the bottom of the main support member on the spring.

Not bad at all. Can you explain exactly what a Flintstone is?

I wouldn't expect the sand to get past the filters. I would be more concerned with moisture remaining in the tanks from when you pressure washed them. When changing your filters install them dry and use the hand primer on the filter housing to prime them before starting the engine, that way all of the fuel is filtered and there is less chance for contamination while installing them. Did you check the lines running from the ECU cooling plate back to the filter housing for debris? There is a tendency for contaminants in the fuel system to get stuck at the connection points on the cooling plate.

Try Mack part number 32MK4195M2. It is a bright finish battery box cover.

The programmable parameters I refer to are DTS (speed sensor tamper detection), which can be either on or off, and DTW (speed sensor tamper detection torque limit), which can be set between 0 and 100% when a fault is noted in the speed sensor reading. There could possibly be a problem with the injector tips if they have been cleaned previously in an incorrect manner. The injector tips for theses engnes (MP series) are extremely touchy and can be damaged very easily if cleaned with wire brushes, etc. If the injector cups have been replaced before there is a good chance that the injectors could have been damaged at that time.

I can't remember for sure on VMAC IV, but the percent of derate for vehicle speed fault is programmable in VMAC III. The injector cups can go at any time really. Some seem to go within the first 3-4 months and some last for a year or so. Usually the engine is hard to start when the cups go bad, if given enough time. When there is only one that is leaking slightly there may be no really noticable syptoms at all. You might see M128 S1-6 injecctor codes or M128 P94 fuel pressure codes, among others. Was the code you posted the only code? Make sure there were no other codes in the active and in the inactive screens for each MID.

ABS can derate the engine if a discrepancy is seen between wheel speed at the ABS sensors and at the road speed sensor. There is a programmable parameter that can be turned off. I forget the parameter ID at the moment, but its described as tamper detection. You will most likely have to take it to a dealership to have this parameter changed, unless you have Mack's software program. While you're there have them check the warranty history on the engine to see if the cups have been replaced, but my guess is that you don't have the most current parts installed as they were only made available in the last month or so.

Regarding the broken stud-If you cannot drill it and get it completely out with conventional methods there are welding rods available that work really well for welding to studs without damaging the threads in the block. The kit Mack recommends for removing broken exhaust manifold studs on the ASET AC engines is made by Cronatron Welding Systems.

Happy Birthday Gambi

Here are some links to some of Mack's news articles on the hybrids: http://www.macktrucks.com/default.aspx?pageid=2189 http://www.macktrucks.com/default.aspx?pageid=1341