Re: Mack M75SX
 

You have too much fun Steve!

Brian

Re: Mack M75SX
 

That's a nice 1 ton dually you have there, Steve. I like the direction your Mack is headed too. I have to echo what the others said. Keep the axles. They are really nice. I'd suggest you just find yourself one big and brawny gearmotor to use as the transmission. We could calculate a good ratio for you, based on tire size, motor selection, and the voltage you want to run. As long as we know the motor's RPM per volt, or Kv rating, and an idea of how fast you want this thing to go.

Re: Mack M75SX
 

I'll have bb's all over the floor unlees I glue the bead . As soon as I turn loaded I roll the 1 tire right of . they look like they have 20psi of air in a tire that should have 100psi of air I got another plan , expasion joint for concrete slabs .

isn't that the name of the game :D:p

thanks Nate , she's a work horse (bone stock) I got my speed issue taken care of . when I ran it the 1st time hauling 20 loads of coal it worked OK but I had a delay between fwd and rev . so I reprogramed the esc ( castle) to eliminate the delay . Also when I hooked it back up I desided to put the trotle on the throtle stick like evreyone else ( I know :rolleyes::o) not realizing you have to reset the radio with the esc when you change parameters on the esc :o . now the bone head that put the shims in wrong on the fwd rear also did so on the rear rear :rolleyes::o so I'm getting there :)

Re: Mack M75SX
 

couple weeks ago I tore the rears apart and re shimed them . I had to press a stel stop in the axle bore do to a change in direction since I machined the axle cassings :confused: I'm useing HPI savage ring and pinion assembly that has the shaft cups for the pin and ball shafts for independant suspension . well I machined the ID bore to keep them on :confused: not thinking the OD of the cups being close to the OD of the bearing :o . well I made my own axle shafts and eliminated the cups . So when I shimed up the diff and ran it a little the copper shims started working into the bore :confused::o Now she'll pull like H@!! :D you can't put enough on it to stop it :D . Tonight I took a little time and mounted the oil tank and pump whille my wife helped pack up some orders to go in the mail tomorrow ;) I also started on the cylinders a couple weeks ago . I did fix the front tire issue :) just added the foams from the distorted tires I have

http://i830.photobucket.com/albums/z...r/PIC_1669.jpg

http://i830.photobucket.com/albums/z...r/PIC_1668.jpg

http://i830.photobucket.com/albums/z...r/PIC_1670.jpg

thanks for lookin

Re: Mack M75SX
 

Steve, Just think, a week today there's going to be a bunch of people layed off at the North Pole. Might be cheap labour to help you catch up with your projects.
Rob

Re: Mack M75SX
 

It's not fun until you scratch your head, and find out there's silicone on your finger:eek::eek::p:mad::p:o:confused:
LOL, Cheer's, Neil.

Re: Mack M75SX
 

so , THAT'S where my help went :eek::confused::mad::p

Re: Mack M75SX
 

My word what a BEAST!! :eek: Not seen anything like it before in the scale world. Nice detail with the mack logo on the hubs.

Re: Mack M75SX
 

I dont think anyone could imagine this turning out any better than it did! Its a scale masterpiece!

Re: Mack M75SX
 

thanks , Nick , DSM :)

well I diverged from scale a little :( once again my attempt to a telescopic cylinder failed :( (for now ) So some quick engineering and design , I'm making up a different set up to get er going with what I have laying around . still milling the rest of the parts . Yesterday built my battery box and tidied up the wiring in the evening .

http://i830.photobucket.com/albums/z...r/PIC_1712.jpg

http://i830.photobucket.com/albums/z...r/PIC_1713.jpg

http://i830.photobucket.com/albums/z...r/PIC_1714.jpg

thaks for looking

Re: Mack M75SX
 

Love those wheels aasseblies, those spoket front wheels and rear covesr with loggo, wow, wow!!
Dan

Re: Mack M75SX
 

Or the pans be runniNice job Steve I think you have the trucks down to a science.....can't wait to see this Mack up and running so when are we gonna get to see the td40 b up and workin?

Re: Mack M75SX
 

thanks Dan

thanks , I get tied up running parts for the semi trucks any more or sometimes a small excavating job comes up . the plan is to get this running then in order ( could change) 990 loader , td40b , pan/s or 385cl cat with a mass boom .

I let the mill run all night and since all I had was a .125 em after my 4mm em took a dump :( , woke up with the rest of my parts done :) now to fit the cylinders I have laying around .

Re: Mack M75SX
 

Looking good Steve, cant wait to see this project take shape,and be dumping in March?:cool:

Re: Mack M75SX
 

Sorry I got that message messed up a lil dang phone

Re: Mack M75SX
 

no prob big T

thanks Tim :) I think it'll be dumping before march :D

Had everything together except the right cylinders :confused: the 1's I have are nose mount :( so while programing last night I had a brain storm :eek::eek::o:D and woke this morn to the mack dumping piles of stone in the shop :eek::eek: OK OK here's a vid :o the truck is a little jerky when steering with a load I'm thinking I need to put in an external bec .

http://www.youtube.com/watch?v=XPzRN...ature=youtu.be

Re: Mack M75SX
 

Works nice Steve! It sure has some speed behind it too!

Better make sure you tighten the lug nuts on that left rear wheel!:D:D:p

Re: Mack M75SX
 

:p the tire rolled off :(

Re: Mack M75SX
 

Evel Knievel at his finest. That truck looks like she'll jump for the Grand Canyon. Got the screw drive working good now steve, lots of power. That load of coal will just about fill the fire box of my big steamer. Your having too much fun!!!!!
Rob

Re: Mack M75SX
 

I see what you mean about trying to keep the tires beaded.

The Beast is performing with stellor power, looking forward to slobbering over it next wkend. :D

Are you using a FM or 2.4 radio?

Re: Mack M75SX
 

yea plenty of power :D I'm still useng hydros I just went with the lift design on my IH4600 1:1 dump . no room for a screw drive with these rears . I also have 1 rear locked , so I might not need to redesign my walking beams


Joe , I'm using a DX8 ,I have all my models on it for now till I get more radios . I'm thinking of a DX10 for the 385 and kobelco blade runner . I may glue the tires after I paint or find /cast like tom did more scale looking 1's . These are too wide to begin with . I'm using a 645MG servo for steering , I think it's about all it can handle loaded . I think It's drawing all it can thus interrupting the motor ,IDK :confused: Now to get this loader running :D

Re: Mack M75SX
 

Truck looks really good steve-I like the way it bounces when loaded. Kinda like the real ones. Do you need me to make you some tires that will stay on the rims:D:D? Nice job.

Re: Mack M75SX
 

Awesome, Awesome, Awesome!! You can see the torque, bout' does a wheelie. Great job Steve! What does it weigh as it stands now, how much do you thing the load weighed? I wanna try it, can I have a turn?

Ben

Re: Mack M75SX
 

Steve, you hit a home run with this bad-boy! It is large, but seems like plenty of power with the two motors, and acts like a real one - carries plenty of payload. It will look so much different when painted.

Want to see it first-hand sometime.

Ken

Re: Mack M75SX
 

Re: Mack M75SX
 

That looks just awesome. Slower would be more scale probably but sometimes its nice to be a little fast to get around. You need some solid tires for sure with those impressive loads!:D

Re: Mack M75SX
 

thanks Tom , the tire should be narrower ( 1" wide ) to be within scale . But they work . I thought about glueing them after I get it painted (long way off yet ) I like the bounce too , it reminds me of the real 1's I use to watch waiting to get loaded at the quarry I seen them running in . those where m45's single axle . I think they scrapped them by now :(

Ben , I put my 55# daughter in it last night and pulled her around like nothing . That was about all the 645mg steering servo could handle .

come to cabin fever next week end :D

thanks Paul , I wonder if we could have a different class in the truck pulls :p

thanks Matt , I can slow it down with the radio , I just got to be smother on the stick .

I finish up a few things and loaded her up for a move to it's 1st job next sat. to see how she'll hold up . See if I can burn the ums pump motor up (not really want to )

http://i830.photobucket.com/albums/z...r/PIC_1740.jpg

http://i830.photobucket.com/albums/z...r/PIC_1742.jpg

Re: Mack M75SX
 

Man, I love the Mack M series trucks. Some of the coolest Prime Movers I have ever seen are Mack M's. Jusy massive trucks.

Re: Mack M75SX
 

Looks cool getting hauled by your IH heavy hauler, killer combo!

Re: Mack M75SX
 

What?! no video of it being hauled around? :(

Re: Mack M75SX
 

I have 1 but it's hard on the eyes to see and it's dark again :(

Re: Mack M75SX
 

Dang Steve, you really need to buy a better camera! I know it cuts into your funds for tooling, but how are we ever going to fully appreciate the craftsmanship? :D

Re: Mack M75SX
 

I know Nate :o actually not , something else takes those funds and will for another 2 years :(:(:( I still got obligations to fullfill from when income was steady till '08' hit :( . It worked the best on sunday at cabin fever after I put in an external bec and started gluing the tires . I had to consentrate on feathering the throtle to keep the spinouts down :o . I meet a guy at the show who took the pic of the real 1 in the mack history book and knew of some of the smaller mseries in my area . He told me the M75's didn't like to steer just like the model . Someday , I'll be running out to NJ to see the real 1 in mack history book .

Re: Mack M75SX
 

Awesome truck and great combo! :)

For the camera, you can put it onto a bean bag (which you can make yourself) or just something that is stable and a bit off the ground, like a few books or aluminium blocks ;) , this prevents camera shake.
If you then use the self timer, it will be even sharper.
Also, for close shots, using the macro mode might be necessary to get sharp shots.

Re: Mack M75SX
 

Here is a few history shots from where Stevie's M75 evolved.

Mack LVX
http://www.stripmine.org/wwwboard/st...loads/16_6.jpg

http://www.stripmine.org/wwwboard/st...loads/11_7.jpg

http://www.stripmine.org/wwwboard/st...loads/10_8.jpg

Model 1938 FC Chain drive
http://www.stripmine.org/wwwboard/st...ck_FC_1938.jpg

Re: Mack M75SX
 

By the looks of the Mack cab I would say that Euclid copied them as close as they could. It's like they had the same mother but different fathers.Haha.

Re: Mack M75SX
 

They must had the same Milkman:eek::D:D:D

Thank's for sharing Steve!

Cheer's, Neil.

Re: Mack M75SX
 

thanks Steve , I'm trying to picture in my head where that pit is :confused: I heard the name of the co. somewhere . if you get on 209 from port carbon Pottsville head to Tamoqua Its like your driving through a trench . sometimes you can see some small drags working on the banks . all you see is the boom maybe a glimer of red/orange in the trees I've did some home excavations in those hills . 18% grade roads is the norm :eek: I'm wandering who really made the frames for those trucks . My dad worked for a co in 60's/70's (before I came in this messed up world :p ) that dug some of the fondation work at mack for the machines to make the rear axles on those trucks .I'm going to have to make a short trip to the mack histiric center someday , you up to it Scott ?

Re: Mack M75SX
 

Maintenance day today :( then the barge came in with a load of coal that needed unloading ;) Altough it was just a little barge (250 ton ) :confused: I changed the motors to 65t lathe motors , what a difference :D still got some kick in her in 2nd but 1st is a nice speed for workin in a crowded area . I had some probs up loading to y tube so I up loaded to PB for now :o when uploading to y-tube finally worked the batts died in the cam :mad:

coming out of the docks :p
http://i830.photobucket.com/albums/z...h_PIC_1869.jpg

dumping in the stock yard
http://i830.photobucket.com/albums/z...h_PIC_1870.jpg

starting to get a little wear in the body now ;)

http://i830.photobucket.com/albums/z...r/PIC_1874.jpg

I'll get the vids on y-tube later tonight :o

I gotta learn how to edit vids now :o

Re: Mack M75SX
 

Y-tube links :o

http://youtu.be/MvonJWxAPtU

http://youtu.be/vhS6QvMzXyQ