JoeH

On 6/10/2025 at 9:56 PM, Mackman87 said:

If I’m not mistaken the ratings only changed if a cross brace was added to the diffs. One running from frame across to carrier. They made a random 50k setup as well in the 90’s, the end of the axle looked like a Rockwell though. 

My '95 has the transverse torque arm and 44k rears, my 2003 has the transverse torque rod and 46k rears.  Don't think that's it.  Probably just re-ran the engineering numbers when Volvo bought Mack and uprated them.  

Try spraying wd40 on things next time it happens. Our old 1960s forklift the distributor cap and spark plug wires don't like rain, but it'll run if you spray some wd40 on it.

23 hours ago, Joe2007 said:

What’s the best way to check for boost leaks? 

High pyrometer temps (1100+) and low boost mean not enough air. My e7-350 went from 1200+/22psi to 900/35 when I found/replacedy cracked CAC.

7 hours ago, fjh said:

Terry !   runs good not smoking out anything

Check boost, could have a crack in the Charge Air Cooler. My '95 e7-350 was a whole different engine when we replaced our cracked CAC. Went from 22psi to peaking around 34 psi under certain conditions.

Pull heat shields covering the EUPs. Warm up engine, loosen one wire screw on each EUP, one a time. (Don't remove screw, just loosen. They're not designed to come out). Remove wire, you'll get a spark, no big deal.  Listen for an EUP that doesn't make a change in engine sound.  This is how you do an injector cutout test on these engines. Not a bad idea to pull all the EUPs and inspect.  Pull the EUP cam followers as well.  My 2003 engine had 3 bad EUPs, 2 had broken springs, one failed electrical component.  2 of my cam followers were bad, almost lost the camshaft but caught it just before major damage was done.

If it's Mack Camelback then it likely has an "automatic" style inter-axle lock.  As a wheel starts spinning the inter-axle lock on the front of the front driver will start engaging, giving a torque bias towards the axle that still has traction.  If one wheel on each drive axle spins then you're stuck, unless you have the momentum to carry you through the slick spot.  While Mack also made differential locks almost nobody ever ordered them as an option, so your chances of having differential locks is about 1/1,000,000.  But I believe all Mack tandems and camelbacks have either automatic or air operated inter-axle locks.

Any fault codes?  Does your lightning bolt work?

Loooong shot but does anyone have experience putting an electronic transmission on a mechanical engine?  I have a 1988 RD690S with an EM6-300L and a 7 speed Mack trans.  We're rebuilding a volumetric mixer for this truck, and I'm wondering if I could modify the truck to run an Allison HD4560p transmission.  I have a cable shift HT740 which would be easy, but it only has a PTO on the top which is a horrible setup.  Useless.  

Pros of auto trans:  PTO isnt clutch dependent.  Can put any idiot in it to drive. 

Cons: grafting the trans and engine to work together.  

From what I can figure so far, I'd need a flywheel/housing, Bell housing, etc, Throttle Position Sensor adapter, and a few other sensors to feed into the Transmission Control Module.

10 hours ago, Mackman87 said:

 

here is a pic of tank setup prior to stripping truck down

Just put spacers between the air tank brackets and the frame.  That's what we did on our 95.  Or you can cut a V out of the brackets, fold the tank out to close the V's and reweld.

My experience with E7 engines is fantastic longevity, poor torque.  My experience with E6 engines (ENDT676 more specifically) is fantastic torque and power.  I had a 2001 ETECH 400 in 2015 and it was a dog, but it got where it was going.  1995 E7-350 we currently have is pretty good, but it doesn't have the torque to pull through hills.  Same as my 2003 AI-350.  They get up hills, but they don't get to the top very fast.  Reality is modern trucks have 20+ years of tech advancements and 2-3 extra liters of displacement.  This engine won't match that.

Hardest part of these trucks is getting the intake system apart and back together.

Your dead cylinder is gonna be a broken lifter, which wiped the lobe off the camshaft.  Berry Cams I've heard can reweld/fix the lobe, no experience with them though.  Alternatively you may just have a bent rod, but id expect the lifter.  They have a hard carbide face that cracks, falls off and leaves a lip that slices the lobe off pretty quick.  Fantastic engine.  But this is the weak spot on them.

https://bucks.crimewatchpa.com/newbritaintwppd/34878/post/mcsap-detail-12

Local DOT stop around the corner from us. Pretty good haul for our local boys this last week! 

I know the ETECH and ASET engine computers shut off if voltage drops below 9.5 volts.  You have to watch for voltage during cranking.  Not sure what your issue is though, you didn't state what problem you're having.

What year and model are you working on, and which engine?

Giving it a second read, first line is "unemployment claims". At 5?  Doubtful... Could be an overly broad DOGE statement...

11 hours ago, kscarbel2 said:

An initial DOGE survey of unemployment insurance claims since 2020 has found:

 

1.      24,500 people over 115 years old claimed $59 million in benefits.

 

2.      28,000 people under the age of five claimed $254 million in benefits.

 

3.      9,700 people with birth dates over 15 years in the future claimed $69 million in benefits.

 

In one case, DOGE found someone with a birthday in 2154 who claimed $41,000 in benefits. 

 

“Your tax dollars were going to pay fraudulent unemployment claims for fake people born in the future. This is so crazy that I had to read it several times before it sank in,” says Elon Musk.

 

I'll give a certain benefit of the doubt regarding those under 5:  severe disabilities?  I suspect this DOGE post is overly broad, there's probably circumstances that could warrant sub 5 year olds receiving some form of some vague entitlement program within social security to offset some disability they were born with. 

I have a daughter (2 years old) on state insurance to cover county provided Early Intervention therapies. She got stuck during birth and has some oddities resulting.  Just wrapped up 1.5 years of physical therapy, working on speech therapy now.  

On 4/5/2025 at 6:55 AM, 3dimesdown said:

Hey all, just wondering if anyone has had luck replacing a stock seat with an aftermarket and gaining leg room? If so what did you use? Thanks!!

I have a Legacy seat in my RD688, it's nice.  I'm 5'11. Initially had armrests, left one went immediately because it interfered with seatbelt.  Right one lasted a few years, but it went too because I leaned on it enough times that it finally deformed enough to start flipping the 'lo lo' switch on my 8ll shifter when going from 1st to 2nd.

On 3/24/2025 at 10:29 AM, Full Floater said:

Aside from a tape measure, from inside of rim to inside of opposite rim, or from some point on the hub, is there any more "accurate" way to align a dayton hub truck at home?  I've always been pretty close with a tape, but with todays tire costs, i'd like to do a little better yet.

We put a block of wood on the ground next to the tire close to the tread on the sidewall, maybe 1/4" gap. Spin the wheel and loosen/tighten lug nuts accordingly.  If you do them often enough you can get a pretty good feel for initial tightening. I tighten top center lug a bit, then bottom gently, then the upper side lug nuts.  This'll start the wedges in pretty evenly, then you go tighten them more snugly and check.  Usually I'm within 1/8th" runout doing this.

https://www.portrayalpress.com/product-p/tm 9-2815-207-35.htm

Book for military Mack engines $50

If you have the book # maybe you can order it from Mack...