JoeH

Good info here, my 95 rd688s does this same thing once in a while on takeoff, only as clutch is being let out. Will have to check for wear on spring T's. My truck does NOT have the auto power divider. Could my issue still be with power divider?

I want it. But wife would kill me, we're saving for a house...

Bump Dan wants it. Is it still available?

No...... The volvo i-shift offers it too... They're the same transmission...

Clogged fuel filter..... You didn't give us much info... What model, what engine...

Change the fuel filters again. My 95 mechanical e7 350 did this last year. First set fixed it for a couple days, replaced the filters again and it hasn't been back since. Also make sure you oil the filter O-rings before install, or you'll suck air in.

Less than you paid!!

And if a cop sees a new engine straight piped he's going to wonder where the immisions parts are

I wonder if these trucks had pyrometers or drivers that knew how to read a pyrometer. Trucks fuel map was probably tweaked, putting out a wider power band and more power. Exhaust systems are designed to be most efficient at a very narrow rpm band. Modern ones are also designed for all that Regen crap. If you're going to delete it and remap the fuel, you have to get the heat out of those heads! You have to redesign the exhaust. Ideal is basically just straight piped.

I had a Ford f250 like that. Had an extra leaf on the front axle, I swear when you lifted the plow the hood actually came up instead of dropping!

Thanks! Can I up the gov to 2100 without hurting anything? We just retired a low rpm endt676 that we turned up to 2100 a few years ago.

Our shop compressor airs up to 150psi, shuts off, then kicks on again at like 115 psi. When you get down near 115 it takes a while to trigger it to pump back to 150. Tires hold a lot of volume. And if you're working in flat mud, you're not really winding your turbo like you can on hills...

Don't change the coolant filter too often. They're supposed to have an additive in them to revitalize your coolants pH level. Changing too often will skew the pH level in a bad direction.

Haven't looked at the hood in a while, don't recall if it's really even usable. Scoop is fine, I can just cut the hood around it and let you separate them. Whereabouts are you? Haven't thought much about boxing it for shipping.

Cat motor, no thanks. Looking at that interior, I'd believe the mileage. Talked to an oil customer today who drives a fuel truck for h&k, he guesses my '88 we just bought is probably around 800k miles. Mine has mold on the dash around the cup holder screwed to the dash panel, HVAC duct work is duct taped, dash panels are not secured well... Radio missing from the overhead... That super liner probably hauled a low boy to and from job sites. Less trips than a dump truck per day...

We just bought an h&k Mack from Coopersburg kw. My dad bought his first Mack from Bobby Metzger there in 1987. Still running it. Truck we just bought had new frame rails and trunion put in sometime in the past 5 years or so, and a good ticking motor. Mack Macungie plant gave their construction work to another construction company, so h&k traded 60 Macks in for KWs. Or so we were told... Some of those triaxles are in really rough shape, some aren't too bad. Coopersburg had the lift axle off one triaxle, bottom frame flange was rusted clean through... We only put 5-10k miles a year on a truck, so we'll get 20 plus years out of our purchase as long as Volvo doesnt screw with parts availability too much more...

I've got a hood with a scoop on it from a 1981 Canadian r686st. Hood has some cracks, but the scoop is in good shape. Don't have anything else from the truck it went to the junk yard close to 10 years ago. Thought I'd offer it before I get around to cutting it up this spring. Can try to upload pictures if anyone is interested. Southeastern PA.

We just bought a 1988 triaxle with an em6-300L / t2070 maxitorque. How does it compare to the endt676 285 hp / 2 stick maxitorque? Not sure what ratios it has, does 60 mph at 1600rpm on 24.5 rubber. Is the em6-300L a maxidyne? We're rehabbing a body to go on it, so it'll be a few months until I can compare to our other trucks! Hopefully it'll have more scoot than our 95 mechanical e7 350...

Great advice on sandblasting in the cold! If you have the ability, chill your garage before bringing the blasted parts in. Once the parts hit room temp then turn the heat up? Glad to see someone saving a good cab! Most of my R models have rust holes along the back of the roof! Doesn't help that we use muriatic acid to wash them, it's about the only thing that takes cement off....

We use waste oil; it's dirty and horrible to deal with but it's free! We have a local shop that gets us about 750+ gallons a year! Our tank for the heater has about 4 inches of sediment in it from over the years.... Can't wait to replace the tank and deal with that mess!

My 95 rd takes forever to air up, but it's a triaxle so it has extra tanks. The compressor gets air from the turbo, so it may be a low cfm pump that relies on turbo boost to be high cfm. How are your Pete and Sterling set up for compressor intake?

As swishy said, "self" adjuster gets so far out that S cam goes over center, effectively releasing that brake, giving you unsynchronized brakes. This is why i always liked manual adjusters, you gotta get out and set them, and the truck will stop straight every time. Added bonus is while youre in there you gotta look at things like brake linings, air hoses, springs, youll hear if a maxi is leaking, etc. Downside is if you hire incompetent people that won't check them then they'll rear end someone at some point.

+1 on the rust, gotta disassemble frame, sandblast and paint before it gets to cracking point. You could probably still take it apart and weld it back together if it's the horizontal flange crack by the trunion. Mack frames want 100,000 pound tensile welding rods, 3/32nds for frame repair. I think 10018 rod? Took my dad and I about a week and a bit to do our 95 rd. Well worth it, but we didn't have any cracks yet. Because the DOT caught you you might have to show them the truck to be put back on the road, or sign that it's been fixed. Once it's been welded, bring it so you can't tell it's been welded.

I have several seized anchor pins on my trucks, never get this. When I drive other people's trucks I do sometimes. Adjusting the "self" adjusting slack adjusters takes it away for me...

Ratio should be stamped in the carrier housing on the differential housing. Axle ratio is how many times the driveshaft has to spin per wheel rotation. If the ratios are different, youre going to blow up one of the rears. If they're the same, check your driveshaft for bad u-koints or a bad carrier bearing. (Rubber bushing looking thing to hold it over the lift axle) Power divider is a switch on the top of your dash. It forces one wheel on each drive axle to have to spin. (If it's unlocked in mud, all it takes is one drive tire to spin and you lose all power through that wheel) Never switch it when a wheel is spinning. Never drive on blacktop with it locked. If all else fails get an experienced trucker to ride along with you.