Lmackattack

Great pics Don, sorry I missed you heading over Donner pass. I went thru there around 9-10PM, maybee next time? Trent

Update: This week I installed a factory wire lead from the EGT probe in the Exhaust pipe to the EGT guage. Temps are still high under load. I checked the crossover pipe and all the rubber clamps, no signs of boost leaks. I was only getting 14 psi of boost so Today I Replaced all the exhaust manafold gaskets, studs etc... to make shure no exhaust leaks. my boost guage is now reading 15psi on a hard pull and temps are still high. this past winter when I took put the boost guage in I was getting 18 psi but I figure that was from cold temps? I asked my local mack dealer what boost psi I should see and HK you were correct 18-22 depending on the condition/ age of the motor. This motor uses no oil and when I had the manafold off there were only 2 cyls that has a very, very slight trace of oil seaping past from a valve or something. It did not look like a caked mess that some old engines have. all looked normal to me. Im thinking that this low boost is possible cause for the hight EGT. I was thinking about swaping a diffrent 285 turbo on to see if it makes more boost. my turbo has a few hair like cracks in the snal but no exhause leakage from them??? only thing I can think of now is the charge air cooler is leaking? does the air that goes thru the tip turbine make its was back to the intake manafold or does it blow out to the out side air? I cant hear any air escaping?? Thanks for the help Trent

ebay has the round knobs in diffrent colors all the time. I have a cracked clear on you can have free.

My advice is if you dont own a house or have huge loans to pay off, test the waters to see if its a for you. After you get your CDL I would reccomend start with part time dump trucking on weekends.Lots of small companys need fill in drivers for weekend help. Its a good way to get time behind the wheel and on job sites. to find solid work it really helps if you have honest friends in the buisness. Not just so you can work for them but for there contacts if they dont have any work for you. It also helps if IT STAYS DRY!. here in Chicago people can get $75-$80 an Hour for semi dump trucks, $100 an hr and up for low boy moves depending on the machine moved permits etc... Some times we charge by the load and get $210 a load if we haul out of down town to a far away dump. most dumps are charging around $50 clean clay. Some dumps close to the city are charging $65 and up!!!. 4 loads a day in traffic is about all you will get unless you go back for a 5th "preload"to get rid of early the next morning. So its good if all the stars line up the night before. If you get D.O.T fines or mechanical trouble your day wages is likely wasted or even worse puts you back. I am very suprised how some of the new guys buy a brand new 100k rig to play in the dirt. and cant figure out why they have no money. Most of the small outfit guys that have been in busness for a long time still like to use older equipment because it sometimes more cost effective. I see new lowboy trucks alot but the majority of the dirt trucks are all 7+ year old macks. so in the end test the waters slowly. and learn from what the successfull owners did to survive. Let us know what your plans are. Trent

Not shure if this is the "exact" engine in your truck but take a look. Welcome to the site Trent http://www.macktrucks.com/assets/mack/prod...i4271001417.pdf

Thad with most macks you can use the first few numbers to find the models "standard" version. I cant find a RS/RL755 in my book but for some examples look at Dan Brunos web page for 1977 RS/RL models. http://www.stlouisdumptrucks.com/convoy9-04b_007.htm A RS/RL786LST will have a 6 cyl 285 hp mack A RS/RL795LST will have a V8 mack with 325 hp ....etc.... the digits after the model number are most likely the build count. When you get the whole 13 vin number you can contact the mack museum and find out what the truck came equiped with including options from the factory. I just looked and it again and it looks like that truck will make someone verrrrry happy. wish I had more room. it would look great next to my RS. Trent

I stop counting at around 95 deg. its been hotter than that all week with the heat index.

Thats a good looking truck Thad. It at the right price also! I would love that truck parked next to my RS !!!It does look to be a RL looking at the thick rear rails. Sounds like you got it down with the RS RL diffrences RS700"L" is a standard designation for lightweight models. I think the alum doors were an added lightweight option. Like said above Alum rails if not looked after properly can cause problems later on. I would not want a used truck with alum rails and heavy rears for the reason of added stress to the rails. Its not commonly seen to spec a truck with lightweight alum rails for heavy haul use. at least not in my aera. The few RL six wheelers I have seen with alum rails all had frame cracking issues. Just my opinion on your rears spring comment.

Nice looking Rig there. She has come along way. Whats her specs? trent

I leave San Jose at arond 6pm local. I figure 4 hours to Reno so I most likely will just miss you? you might see a few race rigs going East that leave later than me. Im team driving this trip otherwise I would stop to say hello in soda springs or some place at the top of donner pass.Anyways I will look for you over the pass if I get held up. Trent

Good info rob, Thanks again for the help I found the "K" wire online. I will order it when I get home if its to pricy from the dealer. Trent

Im heading down I 80 on sunday night from San Jose CA to Chicago IL. If I see ya along the way I will give a hollar Trent

Great pics Barry Do you attend the show and work the Watts mack booth? Some day I will be there, hopefully with both trucks. \ Trent

now thats the way to go Trucking!!! looks Great Jeff, keep up the good work with those machines

therabbittree The probe is just after the turbo in the exhaust elbo that points down towards the frame rail. Both the probe and guage were bought new in December 05. The wire that went from the probe to the guage was standard wire that would be used for lighting. I replaced it with new wire when I installed the new parts but Im thinking its not the right wire or length for the applacation. I am going to buy the factory wire from MACK when I get back home next week. hopefully the wire I used is the issue HK Im getting around 16 psi at full boost in summer 18 in winter. I thought 20 PSI was normal also but thats just what I heard from other people???The air compressor does have a 1" line from the intake manifold to the compressor. I dident think of that as a possible leak issue. I will check that line and check the charge core for leaks. My Air filters were replaced last summer and I have low milage on the truck sience I replaced them. good ideas thanks again Trent

Thanks guys I gave the screw about a full turn last winter. locked it and left it alone. All was fine bob tailing but with a trailer EGTs are seam a little high. The security wire was still on the housing before I turned it up so I think it was at stock setting before I messed with it. I did replace the old wire lead from the guage to the probe. the old wire had the excess length coiled up and zip tied. I will buy a new wire lead from MACK and install it to see if my EGTs change. I thought someone said that the length makes a diffrence? We will see Thanks for the info Again

Im Looking for some people with a 283 maxidyne and 5/6 speed combo. Whats your EGT reading at a hard pull? whats your avg cruising EGT. just wondering as im sometimes seeing some high EGT temps (1200.) after a adjustment of the fuel screw. I also recently installed a new probe and guage. the wire lead between the probe and guage was standard wire. Im wondering if I need a special wire lead/ length or if i just have a little to much fuel going to her? Whats the thought on this one?

HA! And tell us why you went looking for that pic again LOL!!!

I cant recall ever seeing one here in and around the Chicago aera. I know where there are a few sleeper cab F models but no hi rise sleepers. I always liked the look of the ones from across the pond.

Story about finding the familys first dog. My dad bought a used 78' R685ST back in 1978 to haul freight around Chicago Wisconsin and Indiana. It was a standard Chicago speced Mack. 186" WB, 283 Hp tipturbine. 5 speed. 3.86 rears. He was in a partner ship with his brother that owned a trucking company in Lyons IL near I-294 and I-55. He would pick me up from home if he had a short run and we would spend some quality time in the old R model. I was 5 at the time and can remember being able to curl up under the passenger seat for a nap when waiting to get loaded. One winter night dad and where picking up in the city, The truck was backed in an ally dock left running as dad and I waited inside for the paperwork and the full load. When we came out to the truck dad helped me into the jump seat. He walked back around to his door but something cought his ear, He heard a squeek or something. thinking it was a slipping belt or something he opened the hood he stepped between the tire and engine looking for a problem. as he looked around he saw a pup lying under the engine trying to keep warm. The dog wouldent get up or move. thinking its hurt or possibe that we ran over it when backing up. he decided to pull the truck foward to get better access to it. When he picked the dog up it had its belly and chin frozen to the pavement. He managend to free him and put it in the cab with us. On our way back to the rail yard the dog, cold and scared thought the best place to hide was under dads air seat. I remember dad pulling the truck over a few times trying to get the dog away from the seat worried that he would get cought in the sissor of the chair. We took the dog home and had him checked out the next morning. all was ok so we decided to keep him. We named him Buck shot, dads CB handel. Our dog stayed with us untill he died about 10 years ago, still with the pink spot on his chin and belly form when we found him frozen under the old R model. This is one of my most fond memories of dads R model. It was the first truck I rode in and how I became to love these old Mack trucks.

all the maxidynes I have driven felt like they pulled the best around 1400-1600.

Well Mike. It dosent take 3 times to Re-read your post to figure the point you are trying to make about me? Its the same pics of my parts i sold you and the same subject that just somehow comes back to me. I also have never scrapped out a truck but for some reason you think all I do is hold a torch to them. I have used a torch to do to things on a truck. 1) cut the bad cracked rails of my first B model and 2) to remove some butched welds or metal that needed to be replaced, Period. I do recall you offering to sell me some parts from your collection and I can only assume those parts would not have been replaced or would they??? Or is it proper to say you can sell B model parts but others cant?? The part you all ways fall short on is that both of us, and I use "US" as a term as truck fans, have a passion for old trucks yet you continue to take stabs at me, as well as others inside the clubs that share our same intrests. Im not shure as you have been around these clubs longer than I but, is there really room for this unessasary taunting behavior. I think you got everyones full attention from us Mike, We are fully aware that you like to save old trucks, just like all of us do here. I can only wait to drive the old B farther than around the yard Mike, again its the same reason you and others take yours to the show. The Cat powered binder at work is doing just fine sence you care to know. Is not a Mack but again I dont own it. just might pop in that Convoy vid tonight, thanks for the idea Trent

Im still undecided as I may be working for some needed side cash for my other truck projects. If I dont have any side work I will be there with the RS700L. I went last year for my first time with a few friends from Northern IL. The ride out and back was great and I was very impressed with the truck turn out.

I get your point clearly. We all take things apart and some times never getr around to putting things back or find more issues we wish to tackel. $7000 does sound steep so I would pass IMO and find a better price and condition. Superdog. Im a little confused. Explain to us how you are one to preach the do not scrap or take apart motto, yet your a scrap dealer? Its also funny that you only show the same pics of the truck parts I sold you "dirt cheep" from 3 years ago, in an attempt to get a rise out of me. I think most here would agree I did the right thing by dismanteling a truck with cracked rails and sold, traded and gave away everything except the rear springs and truninon. wich I did attempt to give away Free. Im gunna guess you eye color is brown from all the BS attempts to rub my name,trucks and character in the dirt. Feel free to keep trying, but it wont work,People are catching on to you my friend, Be carefull with your words. A for effort Trent Blasco

most of the R models I drive have the small 50 gal hyd tank on the pass side and a larger fuel tank on the drivers side. you could pass a cross over pipe under the driveshaft but the driver side tank is still the issue. The easy fix is to route the exhaust pipe up through the frame rails and add a tee pipe,just above the rails, then its 2 simple 90 deg bends upwards to the exhaust hangers and you can add a mufflers or straight stacks. I did this both on my B and RS models and it looks like a factory set up with no mangled hanging pipes.