Mack DT 3rd rebuild

[ihbuilder]

Originally Posted by SmallHaul

Your 990 could probably lift my Mack up and put it into the back of an ADT..

It'll lift the wedico 966 like nothing

[SmallHaul]

Originally Posted by Bigrigger

Agreed. This build is a classic! This bump is worthy of a present-day pic!

I forgot to post a recent pic up.







The Mack has seen a lot of abuse in the last 2 years but, nothing has really been changed on it. I am now happy the way it is.

It has had 2 failures since it was rebuilt. 2 years ago at the National Pike and Steam show i kept overloading it and the cable snapped where attaches to the servo. I went to my local hunting & fishing store and got some 200+lb fishing line so, i think that problem is solved.

Then last year at the NP&S show i wanted to include all of the kids that were watching us run our vehicles so, i had them fill the Mack with rocks and i would haul them to the top of the dirt mound and dump them over the edge...well after doing that for probably 5 or 6 hours something in the drive-train started slipping...turned out i used an aluminum sleeve in between one of the bearings and shaft for the transfer case and the stress of hauling the rocks up the steep hill extruded the aluminum bushing out into a thin tube. So, all i had to do was make a brass bushing to replace it. I think that says a lot for how strong the tamiya axles are because (knock on wood) i haven't had any problems with them.

I enjoy stressing it until it breaks though because it gives me an excuse to work on it and improve it.

[Kaf343]

Seeing this again is always worth another thumbs up. Nice work on it Scott.

[DaBomb6988]

I love Mack builds too! Are you using tamiya axles? I want to build my own Mack and like the way your truck looks.

[SmallHaul]

Originally Posted by Kaf343

Seeing this again is always worth another thumbs up. Nice work on it Scott.

Thanks Keith.

Originally Posted by DaBomb6988

I love Mack builds too! Are you using tamiya axles? I want to build my own Mack and like the way your truck looks.

Yes, all Tamiya axles. Thank You.

[hammer]

This is a sweeeeeeet Mack great job.

TONY

[kdz76]

very nice truck great work

[SmallHaul]

Originally Posted by hammer

This is a sweeeeeeet Mack great job.

TONY

Thanks!

Originally Posted by kdz76

very nice truck great work

Thank You very much.

[Claus]

That is a great truck Scott, just for bragging rights have you thought about adding locking diffs?

[SmallHaul]

Originally Posted by Claus

That is a great truck Scott, just for bragging rights have you thought about adding locking diffs?

Thanks. I did research how to make locking diffs but, the way it is now i replaced the diff shims with rubber discs that i made to pressure the spider gears and it works nice as a limited slip. When experimenting with locked axles the problem was it was hard to turn when the truck was fully loaded with dirt or rocks. With the limited slip setup the diffs slip more like an open diff when fully weighted.

[Diesel Demond]

i love this truck looks tough and rugged! my son has a bruder dump truck wonder if he will notice it missing?? would like to see some build pics!!

[SmallHaul]

Originally Posted by Diesel Demond

i love this truck looks tough and rugged! my son has a bruder dump truck wonder if he will notice it missing?? would like to see some build pics!!

Thank You very much! Most of the pictures i took are in this thread. If you have any questions or want pictures of certain areas just let me know. The Bruder Mack cab looks so cool.. build it!

[Diesel Demond]

yeah i agree that thing screams work horse. i bet my son would rather control it then put miles on his knees. ill half to ask him.

[rusty47]

Small haul I am doing a conversion on a mack right now and was wondering if you hinged your hood or not. The way you have the truck setup looks absolutely perfect! Hoping mine will turn out half as good as yours

[SmallHaul]

Originally Posted by rusty47

Small haul I am doing a conversion on a mack right now and was wondering if you hinged your hood or not. The way you have the truck setup looks absolutely perfect! Hoping mine will turn out half as good as yours

Rusty, Thank You very much. It is not hinged because it would hit the large bumper. It is quite secure though sitting behind the bumper and having the stock bruder hood straps on.

I also added lights recently. If you skip to 1:40 mark it is easier to see the light setup.

https://www.youtube.com/watch?v=-EAmaSTLXmU

[rusty47]

I've seen the video and love it. Looks great and sounds awesome.

[Claus]

Scott how is this truck holding up after all these years? Have you ever broke any of the drivetrain? Are your axles locked?

One of the Classic builds.

[Bo Wallen]

Looking Good Scott. I like that old workhorse keep going Sir.

[SmallHaul]

Originally Posted by Claus

Scott how is this truck holding up after all these years? Have you ever broke any of the drivetrain? Are your axles locked?

One of the Classic builds.

It is holding up nice Craig, the only thing that i had to do it lately was re-glue a couple of tires that spun loose.

The axle are all modified with rubber washers in place of the metal shims in the diffs. The rubber washers force the spider gears together so hard that it acts like a posi rear end but, if you are carrying 15 pounds of dirt and turn sharp the spider gears will turn.

You can really see them all turn in this vid @ 3:50 mark.

https://www.youtube.com/watch?v=_H-dIBU6laM

Last year i had to open one axle up because the posi action was gone and i found the rubber washers were ground to shreds. So, i cleaned it out and made new washers for it. I just took both of the axles out of the king hauler after the Cabin Fever show and did the rubber washer mod to them as well.

Originally Posted by Bo Wallen

Looking Good Scott. I like that old workhorse keep going Sir.

Thanks Bo. :-)

[Supermario]

Originally Posted by SmallHaul

The axle are all modified with rubber washers in place of the metal shims in the diffs. The rubber washers force the spider gears together so hard that it acts like a posi rear end but, if you are carrying 15 pounds of dirt and turn sharp the spider gears will turn.

I hope everyone is paying attention! This is golden RC info to have from one of the best! Great thinking Scott. I'm definitely doing that to my dump truck. I have a 4th spider in there right now so nothing permanent about it and can do this!