Mack Technician

Pull up a chair friend........

Best not to worry about single occasions..........So you hit a large red mud puddle on the iron ore pit haul and soaked the two uninsulated EUP terminals and engine heat dried it out? Not unthinkable?

Glad she takes time out of her busy coaching career to talk Mack.

She seems pretty atypical for this sight. I think I have seen her before though? Otherdog?

1 hour ago, david wild said:

Don't let the liberals know, they'll want to take them away. 

Thing of the inventory luxury tax they could come up with? You'd end up floating the toy hanger on a barge in international waters.

5 hours ago, 2000CL713 said:

thanks for the info guys. 

i also signed up for the PAI site to search the numbers. i have bought that brand before and it seemed like nice stuff. never engine parts tho. 

When your in the parts x-over click on the little icon of the book (manual) that appears during part search. They have some really nice breakdowns that are easy to interpret, even for disassembly layering.  

 www.skarlupkaservice.com

PAI distributors are notorious for thin (or no) stock of parts. PAI is usually a pet project for a bigger sales agenda. Generally they take the order and drop ship direct to you and up-charge any returns for restock.  

I thought PAI was rinky-dink enough and tried to become a distributor so I could buy parts direct for my moonlighting projects. Shot down! 

ExpL- Called and confirmed your part, as popular as it is, is not in stock at this dealer.

2 hours ago, 2000CL713 said:

i didnt even know it was a problem until the light came on. truck still runs fine.

Good sign, likely not mechanical fail (spring, follower, cam) 

According to my dist an owner/holder of PAI has legal right to the patents and intellectual property of Mack. On certain stuff they buy Mack and re-label. I note about 20-30% lower price as an average. Some dash switches are 50+% less than Mack counter price.  

No complaints for quality. In fact I know a certain *Cough-* dealership -*ahem* who buys PAI cam replacement kits because Mack no longer does certain kits.

The PAI conversion for 313GC5227MX is EM87630.

44 minutes ago, 2000CL713 said:

i didnt even know it was a problem until the light came on. truck still runs fine.

do you have a link or part number for the PAI unit? 

https://www.paiindustries.com/catalog/figurelistPartSearch.php . You enter your Mack number and it will convert it.

Broken EUP springs also an issue and can scribe wall of EUP bore.

Good Luck!

If your roller looks like this get ready for a party.....just saying, not jinxing.

You can ohm it to a know-good EUP. You can continuity the lines back to the ECM (or firewall) if your up to a light amount of digging.

I'd get a PAI (especially if you have no miss, still running, and can order "aftermarket") to replace only the bad unit. Pretty easy day on a truck like yours! 

Pull the block fitting and drain the block before you pull it, or dump into sump and just change oil. 

Roll engine to get the EUP cam lobe down to make install easier, pull bolts up equally when loading back into block.

Always replace both retaining screws.

Record EUP calibration code (on front plate) so you can have code uploaded next time your in the shop.

Gently remove EUP roller and inspect. Scissor spread your fingers (or insert a hook pick into roller slot) and gently lower back onto cam lobe without dropping.

Check guide indexing pin in wall of EUP bore.

5 minutes ago, 41chevy said:

My 2015 Dodge 5500 pick up  tows our Scarab on a 3 axle trailer  with out even a sweat (i will not call it a Ram)

Sure enough, but the "A" class?

If you go the U.P. during deer season you will see a few like this crawling out of the swamp onto the highway.   

29 minutes ago, logtruckman said:

How long before they run out of good engine cores ? How many rebuilds before the block is no more good ? 

Already in the works on that. "Cash for Smokers" Engine buy-back program started by Trump. Program goal is to tap South Am, Central Am + Africa for the Mack engines we chased out.   

Off the Phase 2 shortcut....

"However, to hit those marks, the agencies are asking for better performance from North American truck and engine makers and testing the imaginations of their engineers."

I received insight into how the engineers feel when they reasonably perfect a current emissions tier and the EPA tells them "Hey, guys! Let's TEST YOUR IMAGINATION". No cheers and party whistles in the office. 

I have the Mac III diagram... Three terminals on your dash fuel gauge, I & S & G. The gauge "I" terminal receives 12 volts from fuse 19 and sends power out of the "S" terminal to sender unit in tank. Power goes to tank, through the variable resistor in tank sender and to ground wire/chassis.   

I'd check to see if Mack PDC still has an engine harness in the corner of some warehouse.

10 hours ago, 66dc75 said:

Must have been a hell of an RV at one time. nice staircase for the passenger

Certain to pull a bass boat and not lose on hills.

Nice unit. Nostalgia... My first job we one in a 366 tractor for a yard trailer jockey.  

Manometer