Lmackattack

1900 no load.....you have the dreaded low rpm motor?

You can have the pump recalibrated to a 2100 rpm spec and that should give you some more powere. I would have them bump up the fuel 10-15% at the same time.

Blowby really can only come from a few places.

1. Bad/ broken/ worn piston or rings

2.bad valve guides

3.bad turbo center section

4 blown head gasket.( this would be more obvious)

Might try a Leak down test with the valve covers off to see if it's leaking thru the head or thru the piston rings.

I never heard of Traxsomex? I assume a Mexican company that assembled Macks?

Me again.. LOL

on my RS The passenger side cables run out the back of the battery box, over the bellhousing then over to the starter. the Drivers side cables are much shorter and also meet up at the starter

I have seen Some R models run the passenger side cables under the Engine/Transmission while others they routed over the top. Im not sure what my truck was stock as I removed my old cables and dont recall

Wonder what the reason was behind the bonnet being like that did they have them like that anywhere else in the world ??

I found a picture on the internet that shows a short hood white superliner in Mexico. it looks like a standard R model cab but the hood was contoured at the cowl to accommodate the cab. I think I saved it let me look....

Thanks. Is the expansion valve on the firewall?

Yes it Is located near where the 2 heater hoses enter the cab. Located in the center of the firewall.

Where in Utah are you?

I went thru there yesterday. Took I-80 all they way across

There's a linkage rod on roller bearings mounted to the back of the motor. The pedal pushes a rod that rolls the cross rod, and another works the governor on the pump.

Yes I forgot on the R600 the cross linkage connects to the block but i have also seen it mounted to the cab like on my RS700

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.......

somebody told me lake-cook road is still a 73280# road. we run 80000# (or a little more) so when I go that way I take Dundee over to rt 12. maybe that's why they were out with the portables today

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.

Another Rich Johnson job.....KTI (Kaney Transport,Inc.) of Rockford had this nice Value-Liner running for them.......Al

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.

There was a great story in Bulldog about a test Mack did with 3 F models. they were numbered 318, 335, and 325..........you know what they are. They did a run from Allentown to San Francisco and compared fuel, speed, and number of times shifted. the maxidyne did an amazing job winning in all 3 categories. they also have a video from a helicopter of a lot of the run. I will find the article and post it when I get a chance. I also have the promotional barrels that they compared with fuel usage. The blue was Mack white Cummins and red Detroit. I cannot remember the # of shifts but the Detroit was many X more than the Mack.

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?