Lmackattack

The r model throttle control is all metal rod and ball joint linkage. No cable is used for foot throttle control. The only cables to the pump are for engine stop and a throttle lock for use when running a PTO. These cables simply snake thru the firewall and out to the pump following the simplest path. From the pedal a short rod goes thru the floor to the outside firewall. It connects to another rod that runs along the bottom of the firewall to the passenger side of the cab. From there another rod is connected that runs to the linkage on the fuel pump. There is adjustable positions to control how much movement/ throw the linkage has. Each connection is basically 90 degree change in movement to get from the footpedal over to the fuel pump.

Drool.......

Yes lake cook rd is a hot spot for the portables. I live a few miles from here and it Seams once every month they are out there collecting money from unsuspecting drivers that run to the last exit of "53" and use lake cook to get to rt12. I don't know why they don't change the routing of 53 to use that 1 mile segment of lake cook rd there is nothing between the highway and Rt12 . Only thing I can think of is that they want to keep heavy trucks off the bridge over the marsh?

When the parking brake is set it allows full fuel with no boost seen. With the parking brake released it sends regulated air pressure (15-20 psi if I recall) that limits the rack travel until boost overcomes and allows full rack travel. do a throttle snap test with the brake set and released. you should notice more black when the brake is set.

I would love to know how far they were able to push the new Maxidyne when they were developing it. Any new engine design needs to be tested to see its potential and wonder if they tuned a few of them up on the dyno just to see what they could really do. I can just picture big smiles in the dyno room when they saw some of the early testing results.

That color looks like the same color my RS700L was when new. The stripes are almost the same as my Dads late 70's R model. He had a Brown Truck with tan and orange stripes just like that.

I recall seeing a write up on this. I thought it was in a old overdrive mag? Maybe they just were telling the same story that Mack published? I think it had a brake down of the overall stats at the end and your right. the Mack powered tractor had something like 1/2 as many shifts as the other two trucks combined. Would like to see that if you find it.

I'm heading out to his area next week. I need to give him a call and see if I can stop on over and see him.

A western Mack would have been built in Mack's Hayward California plant. There were many models made there not just r models. The difference between a east coast r700 and west coast rs700L Is that the west coast 700 had a taller hood as the cab was raised up off the frame about 6" the frame rails were straight nose to tail and could be aluminum or steel. Bob mentiond a lot of other things that were different. Western Mack's were built to operate in hot weather with big motors and compete with other west coast truck mfg

I think your right. It looks like it was off a truck parked over in fox lake for years. I think the guy died and the property owner sold it?

the "300"? was the rear wall cut out from rust or was is converted to a Sleeper cab later in life?

The yellow Northern IL R model Mack that looks like a steel hood was a shop built set up. I think they used a B model style radiator With home made fenders and a fiberglass R hood that was converted to a butterfly style or lift off. I cant recall...It is pretty cool how they set it up. That place had lots of old school Mack guys working there before CIT took over.

I missed the craigslist link. What are the specs again? Looks like a great truck Congrats on the purchase of a rust free F model. those are rare!

Looking good. Are you planning to put a weight in the new bed so it smooths the ride out. My RS rode pretty bad when it was just a rubber mount cab. The superliner air ride cab set up I installed took most of the kicking out of the bumps.

I have seen turbos with a id tag stammped to it that would have "muffling device" noted in the specs of the turbo. I thought some of the orders state laws may have even been written that turbochargers were infact considered a muffling device?

I have mine on a air switch in the dash. It does not give more overall power but it does help keep the boost up between shifts as it dumps full fuel sooner. It will smoke more between shifts and can put fuel in the oil. you should notice the truck is a little faster off the line but thats not because of more overall HP its that the HP comes on quicker at a lower RPM

Sad news. But thanks for the heads up.

Thanks for sharing. Those were good times at Mack back then. I know Mack still advertises a maxidyne as an option but they all have more gears than just 5 Will these new electronic Maxidynes pull thru a 5 speed or they don't lug down like the old ones could. I recall a 605hp maxidyne for the Titan. Did that ever come about?

About 27,000 if I recall correctly My tractor weighs in at 16-17k

Yes I went and looked at it a few years back. It resides in northern IL with the 2nd owner. Looks like it was parked in the mid 80s and no one ever went back. The truck has the original cat engine but the frame was stretched camelback rears were removed and air ride installed. They did not do a great job on the stretch. The interior was pretty good was only missing the rear wall interior. But it was a steel dash cab and not sure if it ever had a interior? Cab corners were rotted pretty bad but the truck was complete. Asking price was kinda high last I recall.

5.17 is not that great for mostly highway. I was getting 5.5-6.25 with a e7 350 in a CH pulling lowboy. Days I was doing all highway I was at 6.0 easy.

Al Did you show these pics to Bob Hall(think thats his name?) from Northern IL Mack Grayslake? He had some good stories about This truck running out to the east coast and back. I was in there a few months ago and he was telling me how he would spray the whole frame and aluminum parts down with diesel fuel when he was heading into a snow (salt) storm. Im assuming this was after the first cab was junk in short time and his 2nd cab was installed?

I have a 1982 Hilbilt "Contractors Special" Frameless that im getting ready for sale. This has the side rails that are a few inches lower than standard. it needs welding to the underside, new tires and a U bolt. it has new electrical to the rear, all new brakes and hardware, retractable pull tarp, New Hyd Hose, Fresh exterior paint and new bearings. I bought it in 2007? used it for a few years weekends only and now it has been sitting unused for about 5 years. It needs some TLC but it is what it is... send me you email if interested.

I always laugh when people would say that cats and cummins have a flat torque curve just like a Mack. They think low rpm is 1300rpm Never have found a diesel besides a Maxidyne that could pull good with a 5 speed

let me guess $500+? thats what it was last i checked?