Mackpro

Those gears and tire size are good, just dont go and change over to tall 24.5 tires as you might be undergeared. We had sold a customer a 3 new CV's with 460's a couple years ago and one was a dog. We had it put on the dyno and it was truly weak. We changed the injectors and then all was good, must have got some water in the fuel or just some screwed up injectors. Now it runs the same as the rest.

30 psi is kinda on the low side of specs ( 30-38 psi at sealevel full load) I would have a dealer go ahead a do the reflash for the throttle responce program and have them test the aftercooler and piping. The after cooler piping has 90 degree elbow on top of the intake manifold , the worm gear clamp gets loose and the o-ring sometimes blows out and you loose boost pressure. There is a new style clamp for this, Mack had a service bulletin on it.

Thanks for the info, we got busy with other things and havent had a chance to follow up on looking for the part#.

Does your engine have a coolant filter on it? The reason I ask is around 2001 mack started making the coolant filter optional( I think about 50-75$) and alot/most all of fleet trucks were built with out them. Fast forward to today and most fleets and 2nd owners didnt keep the PH/DCA "whatever you call it" levels correct and it would eat the block up where the liners rest on the ledge in the block and block pitts up on the ledge and leaks coolant past the liners into the oil pan. Now when this happens we usually remove the liners and cut out the pitting and put shims in to raise the liner back up to specs. And of course use new liners and rings and rod and main bearings. This is what we call a mini-overhaul, reuse the steel pistions and heads.

Also what rear gear ratio, transmission and tire size do you have. The most AI engines has a small torque curve and if everything isnt right the performance will suck. I know for a fact that a AI engine with a Fuller 8LL and 4.17 gears and tall 24.5 tires has no low end and takes forever to get going. 4.42 and 4.74 work the best with tall 24.5 tires ( the 4.74 hurt the top end alittle). We no longer order/use the Fuller 8LL due to less warranty and the Mack trans seem to be geared better (love the 310M or the Mack 13-18 speed). We have had to regear so trucks up to the 4.42/4.74 Good Luck

Take it to a Mack dealer and tell them you need the "throttle responce" file flashed on your VECU and any available data files and software for the EECU. The download from Mack is free to the dealer, you should only have to pay for the time/labor to install (2 hr usually) They will have to call Mack tech support and have them turn it on. We do this about once a week and it makes a big difference in power and of course throttle responce between the gears. Do you have a turbo boost pressure/ manifold pressure guage in upper left corner? Should be atleast 30 something + at full load, more boost the better.

Take it to a Mack dealer and tell them you need the "throttle responce" file flashed on your VECU and any available data files and software for the EECU. The download from Mack is free to the dealer, you should only have to pay for the time/labor to install (2 hr usually) They will have to call Mack tech support and have them turn it on. We do this about once a week and it makes a big difference in power and of course throttle responce between the gears. The gear ratio is perfect for tall 24.5 tires. You might change the #4 EUP if after the downloads dont help enough. The new EUP must be calibrated at a Mack shop to be right.

Make sure they replaced the oil cooler inlet screen as this usually clogs and overheats egr cooler and it cracks. Part # is 25099919, if it wasn't replaced you could be doing this all over again.

Looks like a E-7 in an MR. An E-6 would have lifter covers/sideplates on the block behind the injection pump.

Yes there is a fuse that send 12 volts to the switch. The fuse # depends on the year of the truck. 95-98 looks like fuse #31 and 99-04 looks like fuse #3. Really need to know exactly what year to be sure.

If you ever get more than 1 or 2 active (8-1 through 8-6) at the same time, have your fuel pressure checked and it could be low and will set off several EUP codes at once. Those fuel supply pump have been known to go bad (plastic gear slips on steel shaft)

I have seen several Mack Midliner cabovers around here with the "Manager" stickers on them. From what I could tell they were just regular Midliners, I know we sold a few of them new. They were some of the last Midliners we sold. Must have been around the last year they were imported.

EUP pump codes are normal on 04 and up EGR engines, the extrem heat around the EUP's cause them to start to code sooner than they should. If the FMI of the code is 8 (abnormal frequency responce)I would drive it as this seems to be a common thing when cold . If it was mine I wouldn't change it till the code started coming active when the truck is hot. It might go a year or more with out failing. But some guys get nervous when that malfunction light is on and want to change it. We see trucks come in all the time with black tape over the EML (electronic malfunction light).

You could install a 1999 and up Etech engine with a few mods. The EUP pumps are different between the Etech and ASETs so to get the correct HP you need the orignal Etech ECM. The ASET fan is bolted to a fandrive not the water pump as on a ETECH. We have put 99 ETECHs in many newer 06 and 07 CV713's. We are a dealer and can program the ECM,s to match and run quiet good. I would not use a mechanical E7 or a electronic E7 VMAC1 or 2 because most all you guages would not work and it would require alot of rigging.

Thanks for the info, I will check that link out.

In the Netherlands do your engines have DPF exhaust filters on the and the SCR systems or do they just have the SCR system? How is the SCR system been working (breakdowns)? How long have you had SCR overthere?

Ahhhhhhhhhh...... no. We have had alot of trucks get struck by lighting around here (farm trucks parked in fields) and it always fries both ECM's and sometimes the ABS ECM and the AM/FM radio but never have we had a wiper motor screw up for lighting striking. My buddy was driving his CL when it got struck and it blowed the RH rear out side tire off of the rim and fried the ECM's but his wiper motor still worked.

At a Mack SCR meeting we had a month ago, they showed us the 2 gal jugs and a 200 gal (I think) collapsible tote with pump that we could get. This truck I think was a Mack show/test truck as it had no company name, no engine tag and had lots of chrome on it. It did have 22,000 miles on it. The driver didn't talk much only to say he liked the truck.

The driver asked we had any DEF or know where he could get some. We did not know. I called Mack and asked for a part# and the guy said "Ahhhhhhhhhhhhhhhhh........call back tommorow" We would like to have a few 2gal jugs just incase.

We had our first SCR truck to stop in, it had a ABS fault. Driver really seems to like it. It looks just like a regular CXU with a MP8 except for the SCR tank and SCR unit. HP is now up to 505 instead to 485 and tourque is up another 100+ ft lb. to around 1770.

The wiper motor itself had a thermal circuit breaker inside of it. In 2004 they lowered the cutout temp in the motors. We had a driver who would leave his wipers on when it was just misting outside. The somewhat dry windshield was to much drag for the wiper motor and it would pop the thermal breaker and then reset it self again. I talked to a Mack engineer and he gave me a part # for an older motor with the higher cutout temp and everything was Ok after that. I dont have that part# no more, lost my notes. We replaced alot of motors, switches and also check the linkage as it goes bad and makes the motor work extra hard and could overheat.

The last CL I was able to find had a build date of 9-11-06, these were CL733 with IXS Cummins, the truck were listed as a 2007 model year. Never hear of a CL with a MP engine. We have a few CL's with 60 series Detroits around here. I'm working on a CL with a 490 XT in it right now, one of the best trucks Mack ever built.

I got out my Mack FXL overhaul manual to double check and read it again. Still cant find any thing about shims, no pictures or mention of them. I pulled it upon the parts dept computer and it too showes no shims. We are a Mack only dealer and the last time we ordered parts to overhaul a FXL kingpin (about 3 months ago)we had to order all parts separately. There was no kit available, at least for us Mack guys.

Its a CH613 built on 9/28/00. It came with a 355/380 but was later upgraded to a 400hp. It shows rockwell trans and rears. It was a fleet truck with 23 others built along with it, all 23 exactly the same. I can find out more if needed.

Does your leaf spring shackles and front spring pin have grease fittings? If not, you have the Maintenance-Free spring pins. There is a Mack service bulletin "SB131006" about converting it over to the greasable style. It involves buying new springs, pins and shackles. We have done about 5 or 6 and it really improves ride or so the drivers say. It also gets rid of that loud "pop" noise at a low speed turn where the spring slaps the shackle. I just realized this is for CXN only models and you have a CX, let me do some more checking as they might have this for a CX.