67RModel

Would this be the same layout for a 1994 RD? What fuse number is the dash panel lights if you know? Thanks.

The last time I bought brake pads and rotors for my pickup I told the parts counter typist that it was a 2009 Chevy half ton pickup and he did not know that meant a Silverado 1500 because it wasn't listed in the computer like that....like wtf is going on anymore?

You should upload some pictures of it. Everyone here loves pictures and a rust free 85 R model with only 165,000 origianl miles would be eye candy.

Looks like price will continue to climb as US bans crude imports from Russia this morning. Although a minimal amount of total imports (around 10% of US's imports come from Russia) the reduction in supply will drive up cost more. As more Western European countries do the same and ban Russian oil imports there will a sizable void that needs to be filled globally. This is good for the domestic shale producers as they need a high price per barrel (>$90/bbl I think) to be competitive. So hopefully we see more domestic production ramp up and domestic energy jobs added.....Honestly I'm not too sad about the current cost hikes due to Russian oil being cancelled globally. It's really a small price to pay in order to help the Ukrainians as well as punish the Russian economy for this madness.

In my opinion the only thing your 85 R model gives up against anything new or even your Freightliner would be a bit of engine/road noise comfort. These old Macks are very noisy inside by modern standards, which can be fatiguing if driven for hours on end. Just about every other metric imaginable the R model will win in my opinion: reliability, simplicity, aesthetics, economy, etc.

I think you meant fortunately 😄 There was a guy on here a year or two ago selling or at least taking orders for full cab kits for R models. I think actually yesterday the thread was resurrected. It seems maybe Covid put the guy out of business? I think in the thread there someone listed a company in Australia making interior pieces too. Yes I love how 350hp was more than adequate 35 years ago but most people seem to think an engine like this is irrelevant today. I wouldn't hesitate a minute to run that powertrain even in the hills of Pennsylvania. Heck my 94 RD dump has a 250hp Maxidyne. Probably not pulling the weight you will be but she certainly slows down on the hills but gets me there every time. I really could not care less if people behind me get angry. As far as I'm concerned everyone is in too much of a hurry all the time anyway. In my opinion you will be way further ahead going this route than financing yourself to death on one of these new trucks. As long as parts continue to be available your better off with a truck like this than anything made past 2002/2003 really.

How quickly everyone forgets history. In July 2008 the average cost of a gallon of 87 octane in the United States was $4.11. Adjusted for inflation that is $5.37/gallon in today's money. I'm sure we were all complaining how outrageous $4.11/gal was at the time, but the current prices aren't nearly as bad as they were in 2008....Although we could easily surpass $5.37/gal given the current geopolitical horseshit going on now.

Pretty vague question.....in any live tandem axle setup the torque generated is always transmitted to wheel end with the least amount of traction. If that is enough traction to overcome the load then the truck moves. If not the wheel spins. If you engage the power divider then you force the torque into both axles, hopefully by doing this you can put down enough torque to get moving. With that being said the front drive doesn't necessarily transmit torque/power to the ground unless the power divider is engaged. Do you have a power divider? Is it engaged? On vendor axles like Meritor/Eatons it will be a manual air switch. A lot of the Mack tandems have an automatic "peanut" power divider that uses clutches. Please provide more information.

Sorry but this is just frustrating. It literally has the gentleman's phone number listed in the original posting. Maybe you tried dialing it and its no longer a valid number? The original post is nearly 7 years old and the guy has only ever made one post on here and has not been back in well over 4 years.......

Yes very scarce model indeed. Only 67 N613s made during their production run from 1957-1960.

Sorry for my ignorance but who was Ed Ackell? Was he a longtime forum member? Was Hatcity is user name? From everyone's comments he seemed to be a very admired guy around here.....

It has an 8V71 Detroit and a 13 speed. Hendrickson walking beam suspension. All original unit. Will be getting a complete restoration and a period correct Rest Rite sleeper installed on it

This post is more of a shout out and/or review of Ray Sidella's @mack mhe9 (on the forum here) antique truck transport services. I was in a bind because I found a truck I have always been after, however, it was two states and 300 miles away from me. All my typical resources were either tied up and/or couldn't get to the job for quite a while. I tried UShip but had zero confidence in any quotes I received from them. I started reading through some of the threads on the Transportation section of the forum here and kept seeing Ray's name come up. I contacted him through PM and got an almost immediate response. I told him the particulars of the job. He gave me a very reasonable price and a fairly firm timeframe that I was comfortable with. I never met this man before but after the two phone conversations I had with him setting up the details I knew he was the guy for the job. He was very responsive, communicated at every step of the process, and did exactly what he said he was going to do.....and at a phenomenal price. I would recommend him to anyone who needs a truck or piece of equipment moved. From what I gathered he is from East-Central Pennsylvania and mostly runs the mid Atlantic States. If you need something transported in these areas he is the guy to contact. He also runs a cool old Mack MH cabover to boot. I attached some pictures of his rig with my truck for reference.

Its there (unless the truck had new frame rails put under it at some point). You just need to get a little wire wheel on a cordless drill and clean off the frame. My 1960 B81 and my 1967 R model have the model/serial number that matches the door tag stamped into the frame rail in the front passenger side where everyone is showing. My 1994 RD690 is in the same location but as Vlad said its an actual VIN number not the model/serial number like you will see

I know these systems spit out all kinds of errors when one thing is wrong but he did say he is getting a crankcase pressure fault. Maybe these cylinders are putting their pressure into the into the crankcase. But like you said....doubtful.

Interesting. Makes good sense when its explained. It looks like the compression test is functioning properly then. That is to say I guess you can trust that cylinders 1 & 6 have low compression since those are the two that were repaired. What would the chances be that both 1 & 6 have good compression and the test is saying they do not? So it has low compression in those cylinders. Can failed injector cups and/or repair mistake somehow bleed pressure out of the cylinders? Valves not sealing? Cracked piston? Cracked liner? Not much else could be wrong. Am I missing something?

Also 178 r/min seems like too low of an engine speed even at low idle...

I don't know how these new systems work but I'm curious as to why cylinder compression is measured as a percent (%). A percentage of what? What it was when it was new? What instrument or sensor is determining % compression? Did you mess with the valves during your repair? Maybe you could check the valve lash on cylinders #1 & 6 to make sure they are sealing properly?

Thank you but no. I guess I was just wondering if there was any way to tell based on the serial number if it was the first magnum produced. The way I understand it is the "Magnum" was a paintjob, pinstripe, and a different interior so its not like this truck would be a RW7xx - 1001. Thank you for the offer but I was just typing what my mind was thinking and that's really all I want to invest into this one lol.

Is this really the 1st Magnum made or was that something from the previous owner's advertisement? I'm not disputing it or being critical of your work but I was just curious is all.

This is correct. If you shift into the "1st" hole with the deep reduction engaged then subsequently to 2nd then 3rd, etc. you will not gain road speed like you feel like you should and realize what your error is. I was told by an Eaton rep that it is not advised to run the transmission in any gear other than Lo with the deep reduction engaged. Something about lubrication and premature wear but I know of guys who somehow integrate using it (or maybe its using the Lo gear in high range) into their shifting routine in certain instances with no noticeable bad effects.

Does anybody have the part number for the panel/gauge light dimmer knob for a 1994 Mack RD? Also, what amperage should the panel light fuse be and what is the fuse number/location. I do not have a wiring diagram for this truck. Thanks in advance.

It can hurt to put a post here on the forum in the Classified section. Doesn't cost a dime to do so and it might catch someone's fancy here. I would have to think Facebook Marketplace is currently the best platform simply because of the sheer amount of exposure your ad will have to all walks of life. Another good option is the ATHS "backlot" classifieds as they end up getting published in the Wheels of Time magazine. Most of the traffic here is related to troubleshooting, wrenching, comradery, etc. but there is a large concentration of "Mack Guys" here so you never know.....

It depends on how your CDL is classified: interstate or intrastate. If you have it classified as interstate they will revoke it if you don't get your medical card renewed. If you get it changed to intrastate you get no correspondence regarding medical examination. I can vouch for this as I have had it classified as both ways at different times. You can go to the DMV and get is switched for something like a $10 administrative fee. But if you have it classified as intrastate you better not get caught in a neighboring state without a valid medical examiners card. All they guys saying your license will get taken are probably saying this because yes that's true if your CDL is in the interstate classification. A lot of guys do not know you can get it changed to intrastate travel only. I'm not quite sure what the government's logic here is but if you are medically unqualified to drive a 80,000 pound vehicle I don't see how staying within any state's boundary makes it OK to do so.....

I think Zollner became or was bought by Mahle of Germany. If you go to a high quality machine shop that works on heavy duty engines they may have some old catalogs or may be able to find a catalog cross for the old pistons. All the machinists that worked on and overhauled those engines back in the 60s and 70s are probably long gone but there is somebody somewhere can probably find an modern replacement?