New to me Pinnacle

http://www.truckpaper.com/listings/...xleLbs=14600&Transmission=Ultrashift&PT=60000

 

Found it looking for heavy front steer autos. Wouldn't have to stretch it. I was just playing around looking. Most anything is going to need modified for your application.

Fleet truck should have records. Most likely been overhauled and has new liners which fixes many issues with that generation isx.

 

OK I get what you are trying to do, but here is what I'm puzzled by is the box weight itself, I've seen huge welding setups that don't weigh that much. I am still trying to figure out what you are doing or what the operation is, you don't have to explain it in an open forum.

However, here are a couple points to ponder.

The first is the reason for the double frame, there will be a lot of twisting going on and with a stretch or extension made, that will undoubtedly move your drives back (don't forget you have a limit with the drive shaft), there will be a lot of stress on the frame, and the alignment could suffer, meaning your tires will too.

The second reason for a double frame is you are carrying a lot of static weight on the chassis, so eventually there will be fatigue going on, the double frame will help with prevent things like cracking in places you never would expect it to happen.

The weight on the axles are a concern, but I ran a truck for a customer that had an 18k front axle (I recommended for any heavy application) plus a steerable front lift and a rear lift axle. Lift axles are cheap, compared to other solutions. This solves two problems at once, one is dealing with bridge laws, aka road restrictions or weight restrictions, and the other is how the truck can handle 34k load. With that truck, Western Star 5900, I could get on the deck (30 foot long) up to 47k dies sets and the truck handled it well - the truck without a load was 33k.

Now this brings me to another issue, I absolutely love Macks, I have a lot of them in the fleet, but my HH trucks are all Western Stars because they seem to hold up better. I bought four of them for HH and found they did the work but two gave me fits that I could not afford to deal with, especially when I had customers who depended on moving their stuff. You don't have to stick with one brand or model, I would seriously shop around a little bit just to say you have, you may be lucky to find something that needs a new home.

AND I have to also ask this, did you actually talk to Mack?

Not the dealer but the company, they've got a team of consultants there that can help you with the setup of the truck. I've used them before to do my first and second HH trucks.

 

Yes the main place should help you with getting in touch of the right group.

www.macktrucks.com/-/media/files/body-builder/manuals/7-frame.pdf/

Actually go here, scroll down to the contact us button and send them an email.

I'm not talking new, I am talking spec'ing it out for you to know what you need to get. They should be able to plug in your needs and spit out what WB, where the axles need to be and so on so you don't guess at it.

but got to tell you that if you are going to put on 15k a year, maybe going back farther maybe to 2002 would be prudent. I wouldn't worry much about the mileage an existing truck has on it, I would do a dyno and then see if it works.

 

The mack you are looking at had 3x the motor that international has. That international weighs next to nothing on steers compared to the mack which means you can transfer some weight to steers on box. An international or other medium duty like that could be picked up for a song and dance.