Prowrench

4 hours ago, JoeH said:

http://www.truckpaper.com/ListingsDetail/Detail.aspx?lp=TRK&OHID=32709799

truck paper, ritchie brothers, iron planet,craigslist I check them everyday I also placed an add in wheels of time. I posted here to perhaps make contact with a member of this forum that either has an R Model to sell or can actually put me in touch with someone they know that has one for sale .

1 hour ago, Maddog13407 said:

so why bother posting a bragging picture?? he was looking for one For Sale...

Ditto

5 hours ago, hicrop10 said:

Here’s my 79,all Mack.Had it since new.

which engine, trans and rear suspension where's it located and what is the asking price?

looking for an R Model 1976 through 1979 must have a 300 or 300 plus must be all Mack

looking for an R Model 1976 through 1979 must have a 300 or 300 plus must be all Mack

looking for an R Model 1976 through 1979 must have a 300 or 300 plus  must be all Mack

Can any of the Chicago area guys tell me if Greco contracting of Des Plaines went out of business. I never get up that way anymore and someone told me today they closed their doors 2 years ago.

10 hours ago, Dirtymilkman said:

It's all how you order the truck. You can still spec multi leaf front springs. I have had less maintenance with them. It seems the taper leaf eat bushings more often. Multi leafs are stiffer ride though. 

they certainly are, the multi leaf were sandwiched in a slipper pad at the rear which was more forgiving to extreme travel of the spring

Does anyone know what year the R model started using round tanks?

real cream puff  picture of detroit under hood but ad says 400hp Mack ????

6 hours ago, JoeH said:

Not sure what you mean by bounce the throttle; my 79 gets a hop in the chassis around 45 mph or so, it has the shackle style steering springs. Gotta plant your heel.

that's exactly what I mean but I never experienced that on the newer springs

10 hours ago, JoeH said:

Probably also around the time they added 3 inches to the back of the R cab too.  

I'm thinking you are correct padded dash, new style suspension and add depth to the cab. I'm guessing the change in the suspension was due to the fact that the old multi leaf would cause your foot to bounce the throttle at 45 mph not 44 not 46 but at 45 and what a pain that was, couldn't give it more throttle unless you shifted to 5th couldn't drop r's otherwise you'd be too low

sure is different

Looks like a big block MoPar 🧐 with a lousville bumper I wonder is this factory?

32 minutes ago, JoeH said:

My 1980 DM is a slipper style rated at 20k, 12 leaf.

A DM is different than an R I'm just trying to figure out what year the change took place, I'm willing to bet it was when square fuel tanks changed to round.

Well I guess I should have worded my query differently. The older R's had a multi leaf that was pinned in the front and was a slipper at the rear, at some point the R's started using a "taper leaf" which was commonly 3 leaves pinned at front and the rear of that spring pinned to a shackle and the shackle pinned to the hanger drawing is the old style on R's photo is new style What year was the change on R's? the rear spring hanger is very different and maybe the front

On 8/17/2019 at 5:27 AM, blackdog2 said:

Mid 70s ?

That's what I'm guessing wish i could pin down a year             

WOW what a challenge it would be to restore that truck

A small bit of insight I never cared for anyone's diagnosis I always do my own, however I have always been appreciative of a driver/operator that has a good understanding of how their truck works because that helps me in my diagnosis. Example if you feel a vibration it's very helpful to the mechanic if you know that it's in your steering wheel, seat, gear shifter, clutch pedal, accelerator pedal etc.

Any way welcome and i hope you find this forum helpful and a valuable asset as I do

5 hours ago, autocardc said:

It’s in St. Louis, a standard mixer can gross 72k in the city. About half the mixers here have no booster axle. How much can a boost-a-load gross in Chicago?

not sure but I know a concrete guy and he says 9 yards is all they will put on a truck unless you're a regular customer then it's 10 but for those big projects they always load 11

On 8/15/2019 at 10:23 PM, mowerman said:

 

New furniture new paint

 

 

Sent from my iPhone using Tapatalk

 

great view

On 5/31/2019 at 10:12 PM, autocardc said:

this mixer may look common where it's from but around the Chicago area it looks naked without a booster axle  nice pic

4 hours ago, JoeH said:

68"5" was the 237hp variant of the 672 cu inch 2 valve diesel,

68"6" was the 283 hp variant of the 672 cu inch 2 valve diesel,

68"8" is a non maxidyne engine, commonly rated at 350 hp, designation used both on E6 motors and E7 motors

6"90" was the maxidyne version of the E6 and E7 motors.

The E6 uses the same 672 cu inch block as the old endt676 motors of the R685 and R686. Probably minor internal block changes typical over years of running the same engine. The E6 used 4 valves per cylinders, whereas the ENDT675&6 used 2 valves per cylinder. So they have different heads.

This is the most comprehensive response Thank you. It does conflict with what I've been told I researched my 686 before i purchased it and my local dealer said the vin indicates it was built with a Econodyne 350 Hopefully iI will hear from the Mack museum and get the VRI thank you again

1 hour ago, ekennedy21 said:

I believe you have incorrect information. Joe is correct, your r686 was built with a maxidyne 300. Your r688 likely had a 12speed transmission and your 686 likely has a 7 speed.

Ok the 688 factory built Mack 9 speed, the 686 according to two dealers Econodyne 350 and 6 speed  not looking to argue just trying to figure out what 685 686 and 688 are but i keep receiving conflicting info and the dealer doesn't know I emailed the Mack museum and haven't heard back this curiosity has  me chasing my tail