Lmackattack

The RS600 had a few diffrent ways to mount the air ride cab. some used a aftermarket cab mate/superliner style air bag while others had the standard R model twin bags. It all depends how high the cab sat off the frame rails and how the truck was speced. My RS700 cab sat up about 6-7" off the rails. I was able to use a superliner air bag set up and it works great.

Mine was used off of ebay had a cracks like yours has. about 1/8" cracks. I sanded it down filled them in let it set up and sanded again. was smooth as silk. had it painted and it looked great. last week I jump in the truck and see that its cracked in the same spots. but now they are smaller cracks 1/16" but they can be seen. will likely just push some more of the stuff in and see if it hides them at all. I think the plastic just shrinks when it gets real cold.

i just did my wheel this summer and it cracked again. I used the stuff that is made for steering wheel repairs and it still cracked as soon as it got cold? My advice is to put the steering wheel in the freezer 1hr before you push the puddy into the crack. it may reduce the shrinkage issue??

any highway in and around Los Angeles. concrete washboard! I 40 is bad where mentiond above. also I40 out in AZ can be a real roller coaster. not bumps but can take the wind out of you at 75 MPH

I added air ride to my cab this year. I was able to keep the cab mount exhaust but had to make some new stack brackets. I also removed the x brace for the radiator. Added radiator support bars to the frame. Then used a superliner air bag set up. I modified the rear cab brackets to support the lower air bag mount. All that is left is to put the hood rest rollers on the cowl. Not hard just a lot of little things.

I think you would just be creating a nightmare if you bought a r cab and converted it to a superliner. Just the bodywork involved would be a pain. You will find that the R model cabs had slight changes over their years. Some things that I noticed were diffrent door latches, exhaust mounts on the cab,wireing, cab lights/horn placement. Air cleaner location. Air ride cab, hood rest on the cowl. Radiator mount...there at some of the things I had to deal with when upgrading my 1977 to a more modern cab.. Trent

1977 RS700L RS786LST32474

Mike I misplaced the title 8 years ago when I moved.. If I recall the reliable wrecking truck had a door tag with a vin # that did not match the title. This tag was just sitting in the cab not even screwed into the door.. I do recall that the title had the same number that was on the frame.If I ever come across it I will let you know. I have everything in storage as I'm moving again.may be s while untill I can check. Trent

I buy parts from Northern IL mack in grayslake IL. never bought a truck from them but they have some guys that work the parts counter that know alot about the older R models. A vin is always needed to start but they can search back for superseded nimbers etc... have pulled thru many times on V8 parts and RS700L parts. Trent

thanks guys. Its sad to see here go but just have no time and its been sitting out doors for to long. Weather is getting to her. Would rather see it go to a good home than collect dust and rust. Thanks for moving it Herb. It kept asking me to select a fourm title or something? would not let me post the thread in the for sale section???? anyways think its already sold. Met with a guy this weeknd and we made a deal. should be gone in the next few weeks. Trent

Can also be from Lugging to much. that was a known issue on the early maxidynes. but most cases it was the rear of the block that broke. Regardless things brake even with good care taken.. Trent

most of us that have plated antique trucks have been given the run around at the DMV. You just need to remain calm and show the person or ask to speak to a person that can fully understand what your doing. as long as the truck falls under the requirements for antique tags your good to go. Most people at the DMV dont see many people plate them as antiques so it throws them off. try again! Trent

Barry it wont let me post in the for sale section??? Built from 3 parts trucks started with a Reliable wrecking B model, used the frame from a Celli B model and a Cab that I brought home from Long Island NY Truck has a END711 (running) with a Quad box. Walking beam with 5.73 ratio Started out as a restoration but never finished it. Frame and cab were fully sandblasted and painted in 2004-05. New old stock doors and fenders bought so the sheet metal is in great shape. Interior is painted green and has a refurbished bench seat. all new glass ( vent windows need restored) will need some body work as the truck has been sitting out side. mainly just the back of the cab center and where the doors made contact with the cab channels. needs the trunion bolted back up as I was getting ready to pull it and swap in air ride. needs brake system hooked up as I removed the roto chambers to install spring brakes. new 12v starter with new alt lund visor new roof top marker lights engine has new hoses have alot of saved parts off the parts trucks to go with the truck. can be driven onto trailer. no title but can get a salvage title if it helps. Located in Volo IL $4500 OBO Trent 847 738 8569

I remember 15 years ago 2.00 a mile was good. It paid fuel,tags ,plates and maintaince, with profit left over so you could own a home and see weekends... Now I see rates as low as 1.30 or team rates at 40 cpm. Fast forward to today where truck price,Fuel, tags and insurance has doubled. Yet the blind new drivers keep marching in to the slaughter house

if you go on you tube there is a guy with his mack hauling out of a farm field. he goes up a ramp and gets the rear ends to bottom out on the RR axel stops!. then feathers the throttel near the top to get the front end back down softly.

Yea. there were not without issues. Sheet metal was pretty bad around all the seams. only thing that was in ok shape was that the drivetrain was all intact. I later went to Celli yard and bought up some of their old alum 5 hole budd rims. they had some NOS B model doors and fenders as well. on another note 2 years ago they knocked down the C.T.C/ Northwest Mack building. They had a NOS F model day cab and some other parts in a trailer that was scraped. They did save the Bmodel water truck. It went to OE express in Wauconda. sits in their yard... Trent.

hmmm. thats pretty low IMO... I get scared below 20-25psi hot idle. It can be a few things. not specific to your engine but what I have seen ... stuck press relief spring bad oil pump broken piston cooling jets clogged oil pump intake low oil oil pickup tube leaking (no suction.) thats a start but 5psi hot would scare me!

ok how fun was it trying to get back in the cab to get your camera out? LOL

Look in my Photo album.. theres a pic of 2 celli trucks I was able to save from the torch. Will also see 2 Tanzillo R models that we used to get the celli B models out of the field they were in. that same week the guy cut up 3 celli R models. I think we saved an A model as well? anyways they were taken about 8 years ago. I was able to use the Celli truck for its frame and misc parts. used a engine and trans out of my 1s Bmodel that was owned by Reliable wrecking Winfield ILL I also drove a ex Paulmbo R model for my first driving job. Red frame with orange and black paint. Was a 300 with a 6 speed 4.17 rears. Common speced R model. rode like crap but was a tank. there may be a pic of it in my album. if its there you will see a yellow R model with Kanzler on the side. other Chicago companys Prairie Plote Const Ozinga Meyer met AA conte Plaza Greco Sid kamp jack Gray (chicago?) Trent

the 12 speed will also have stronger gears than the 18 speed... IMO the 12 speed is the best trans behind the 300-350 macks. drive like a 5 speed empty and can split them all when loaded. most times I would just run 1-2-3 in direct then split 4th and 5th. some times only needing to split 5th. great when trying to keep the RPMs up on a hill. or keep EGTs down.

you can use the low low 1,2,3,4, 5th then grab direct to get 6 total forward gears but you cant "split" any of the 5 gears. Some say only use low low with first but I have never seen a problem with using low low thru the first 3 gears to get the speed going before you get into direct. Do be carfull trying to downshift from direct to low low. its not as forgiving as downshifting the main stick. Trent

IIRC the frame on a DM was diffrent. it had a deeper section under the cab and then tapered back to a normal hight. the DM was basicly a heavy speced U model.

Nice!!!!

my 77RS700L left the factory at 15,500 with no fith wheel 6cyl,6 speed,tandem axel. the V8 is heavy so I would think in the 15,000-16,000 range