Mackpro

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.

There is no shims on an FXL axle. I talked to an engineer after we had some with out of spec play and he said after the top bearing and race get worn in and mated, you need to retoruque the top nut. After we did this all was good. He said Mack had alot of kinpins replaced under warranty when there was nothing wrong with them other than they needed to be retightened. 95% of the ones we tore down, there was nothing wrong with them, just retighten top nut. The warranty on most FXL axles is 3yr/300000miles even on most dump trucks.

The cup issue has slowed down alot. We are now starting to see the cup issue with the older 04 emission MP7 (non DPF). I did 2 of these in the last 3 weeks. On Saturday we towed in a 2010 (non SCR) CXU with 2 blown cups/washers. This truck was on its 2nd or 3rd trip (very low miles). The engine had all the new stuff in it. We think it was improper tourque on the injectors. The new parts (injector washer and hold down and download) have seem to fix cup issue. We have never had one come back that we installed these parts on. I dont know what happened on the 2010 CXU, I hope it was just a fluke.

What year truck and what model? Has the problem just started or has it always been like this? Truck sounds really weak. CH and CX's should get at least 5.2 or better and the dump trucks RD and CV's should get in the mid to high 4's at worst.

Yes, the AI engines have updates for poor throttle response and it make a big difference. The Mack dealer could also send in a HP change request form to Mack and see what it would cost to go to 460HP, sometimes just a simple download. Most 427 and 460 have the same exact engines just different downloads. Have you changed tire size since truck was new? Most AI engines have a narrow torque curve and if you upset it, you will feel like you have lost power. 4.17 rear gears and tall 24.5 tires are a no-no, we had to change out some ring gear and pinions before. 4.42 and 4.64 with tall rubber work good with these engines. 4.42 seem best but 4.64 are good but you lose some top end MPH.

Here is the wiring for the radio on an MR, hope is is clear enough.

Very simple setup. plastic bushing in the bottom and a wheel bearing race at the top. Take the nut off the top, knock the king pin out the bottom. Install new plactic bushing in bottom and race in top of spindle/knuckle. Push new kingpin up through the bottom, put new bearing and nut on kingpin and tighten to 563-689 ft lbs. On the sealed wheelbearing hub , tighten it to 664-811 ft lbs. I can fax you some pages out of the book if needed.

We have in stock and sell steel chrome bumpers for most all CH-CHN and CX and CXN's. We are a Mack dealer but the ones we sell are not Mack brand. The chrome steel bumper is cheaper than the factory plastic one.

I have wiring diagrams for both MR and MRU's and can give wire #'s if needed. Just need to know if its a MR or MRU. Last 6 of vin # would help also.

The other day they were building both SCR and non-SCR truck on the assembly line. Back a few years ago the EPA would let Mack build up 3 months worth of (dirty)engines to use the next year (during an emission change) . I think we had 3 months of non DPF MP7's to use up when they were really suposed to use the DPF engines. It might have been the EGR years ( 03 to 04 ), I cant remember exactly. We had some Mack Powertrain guys come down and we had a diner and they put on a slide show about SCR and it dont look all that bad. Our MP8 485 is now 505 HP!!!!!!