Re: Unit Cable Hoe
 

why is it i see that rig and then the radio starts playing deep purple - highway star? lol

good to see you saved some old iron!

Re: Unit Cable Hoe
 

SmallHaul-looking very good!! And also, you work really fast!!

Re: Unit Cable Hoe
 

It is not too bad if you just route one line at a time.:)

Papy, can you make a thread for this in the 1:1 equipment forum and post some detailed pics when you get a chance? Cool machine.

Thanks! Now I can start on the final stick & boom.

Re: Unit Cable Hoe
 

nice job so keep up the awsome work that thing is a cute lil bugger lol be neat to watch it work

Re: Unit Cable Hoe
 

Scott, you do a great job on these. Looks like it's got plenty of power too.

Re: Unit Cable Hoe
 

Thanks Henry!

Thanks Joe!

I got the drive sprockets yesterday so, now I'll start building the undercarriage.

Re: Unit Cable Hoe
 

Oops.. forgot to add a link to a vid of it loading two trucks.

http://www.youtube.com/watch?v=bLbSpTaTekY

Re: Unit Cable Hoe
 

Scott this is working better every day..

Where do you find all these old toys?

-MIke

Re: Unit Cable Hoe
 

Thanks Mike, I buy most of them from ebay.

I got the drive sprockets so, I made the drive axles today.

http://i240.photobucket.com/albums/f...esprockets.jpg

http://i240.photobucket.com/albums/f...riveaxles2.jpg

http://i240.photobucket.com/albums/f...riveaxles1.jpg

http://i240.photobucket.com/albums/f...drivechain.jpg

Re: Unit Cable Hoe
 

ooooooooooooohhhhhhooooooooooooooooo looks purdy!

Re: Unit Cable Hoe
 

Hey Scott, send me a pm, I have a bunch of picture's to send with measurement's. Can't scan the borrowed literature until I replace my computer, gone senile! .NetFramework is eating my lunch.
Later, Neil#2 aka doodlebug.

Re: Unit Cable Hoe
 

:D

PM sent. Thanks Neil!

Re: Unit Cable Hoe
 

Neil, thank you so much the pictures are great!

One thing that bothered me about my model is that I couldn't extend the bucket all the way out if i wanted to and all full scale cable backhoes seem to be able to? And now after seeing your pic I realize what is wrong...the top pulley arm mount pivots just like the bucket pulley arm, I have mine solid mounted... Doh! :)

http://i240.photobucket.com/albums/f...ucks/unit3.jpg

The other thing that I didn't like about my model was that the top (hoist) cable lifts out of the pulley when you raise the boom too high and after looking at your picture I see that the full scale Unit has a small drum on top of the auxiliary boom that keeps the cable from raising up! :cool:

http://i240.photobucket.com/albums/f...cks/unit13.jpg

Thanks Neil! Two thumbs up! :D

Re: Unit Cable Hoe
 

nice pictures! this is gonna be an extra circular project now? lol

Re: Unit Cable Hoe
 

Hey Scott glad to help, let me know if you need different angle's or better lighting, LOL!
Ordered a new computer today, hope to have the lit. scanned later next week.
Later, Neil#2 aka doodlebug.

Re: Unit Cable Hoe
 

found some pictures and videos. might have seen them already. one video is kinda scary...

Scary video of guy unloading a Unit Crane tracked
http://www.youtube.com/watch?v=83tSiHyAQ5A

Clam shell in action
http://www.youtube.com/watch?v=CZUR9iPPTgc

Unit crane model on a truck
http://www.doepketoy.com/?tag=doepke-unit-crane

Several configurations, from crane to bucket to excavator
http://www.doepketoy.com/?tag=unit-crane

More links
http://www.constructioncollector.com...rial-Unit.html
http://www.ccmodels.com/closed-crane...-CableHoe.html
http://www.gerhartmachinery.com/equi...l-617-sn65186/
http://www.bigoldiron.com/cranes.html

also some classic toy parts
http://store.classictintoy.com/mm5/m...tore_Code=CTTC
http://thomastoysantiquetoyparts.com/

Re: Unit Cable Hoe
 

i like this build going to be interesting can't wait to see it all together and working........................i thought i was into the old stuff like 1960's but SmallHaul , you got me beat lol on the old style equipment models

Re: Unit Cable Hoe
 

Nice with those chains, got to remember that if I build a suitable model.
Papy, nice truck, is it from France?
Dan

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Switzerland.....but you were not so far, because it's based just in the neighborhood of the french border.

As SmallHaul suggested, I opened a dedicated thread, so you get more of the story here

Re: Unit Cable Hoe
 

Thanks Henry, I really like how complex these old machines are. The more I learn about them the more I realize how much engineering goes into one.

Neil, I just got a 1950's Unit repair manual that has great photos and documentation but, there are no measurements at all... so, all the measurements you took were very helpful. I calculated all of your numbers to 1/16 scale and my prototype boom & stick are a little over sized but, not by much. When you get the cab roof to floor measurement We'll see how close the Doepke toy actually is to 1/16.

Thanks for the links Dean.:)

Thanks Dan, I decided to make the rotate chain drive too, using #25 chain. It will be easy to setup and it should be very reliable. I just ordered the sprockets for the rotate setup today.

Re: Unit Cable Hoe
 

Hey Scott, bottom of "house" to top of cab is 6' 11 1/4" high, or 9' 10'' from the ground. Track's are 2' 4 1/4'' high,
not the version you're building. Ground to bottom of house 2' 10 1/4'' Track length 10' 1'' or 10' 10'' high flotation version. Track shoe width, 16'', 20'', or 22'' long track version-flotation. Width of track's outside, 8' 0'', 8' 8'', 9' 0''. House is 8' 0'' wide.
Hope this help's. Later, Neil#2 aka doodlebug.

Re: Unit Cable Hoe
 

Neil,

The Doepke Cab is 5 inches tall so, times 16 it would be 80" and Your measurement is 83 1/4". The width of the body is 6 inches and times 16 is 96" perfect to your 8 feet wide. So, it is accurate to 1/16 scale. Now I'll make the prototype boom match your numbers and make sure I am happy with how it digs.

Thanks Neil!

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Hey Scott, do you need the "arch on the boom"? Let me know!
Later, Neil#2 aka doodlebug

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Yes, if you can that would be great! I ordered 1/2 inch square tube for the boom and stick because after looking at the boom in the Unit 357 maintenance manual it looks to be about right. Did you measure the width and length (not counting the teeth) of the bucket? I wonder how far off mine is.

Re: Unit Cable Hoe
 

Scott , you OK for the boom now ? My guy didn't get back to me yet :mad: ( typical :rolleyes: ) I think I'll be going elsewhere in the future . your doing a good job .

IHSteve

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Steve, I think the 1/2" square tube is gonna be fine. Thanks for trying.:)

Re: Unit Cable Hoe
 

Hey Scott, I'll go by tomorrow LOL. Just got off night shift, the contractor forgot to cancel dump truck's tonight. Got 2 hour's for showing up!
Later, Neil#2 aka doodlebug

Re: Unit Cable Hoe
 

Hey Scott, the bucket is 24'', 3 teeth. The dipper end of the boom, to the center of "arch'' is approx 10' 1'' from the pin (dipper arm) the the fork/drag pulley area (picture #1)
The boom is 21 1/2" wide, 10" tall, the gap in the forked end is 11 1/8''.
The arch in the boom is 22'-23' degree's.

Later, Neil#2 aka doodlebug

Re: Unit Cable Hoe
 

Wow, the bucket is only 24" wide? That is only 1 1/2 inches in 1/16 scale. The bucket I made is 2 inches wide and looks about right.

Thanks for the measurements Neil, I went through all of your numbers today and set the hoe up with your measurements. It works and digs great set to scale size. I packed some dirt hard and added water to make it thick & heavy, loaded one of the Tonkas and it did very well. It should really dig well when I get teeth on the bucket.

Re: Unit Cable Hoe
 

Hey Scott, now you know why the bucket has side board's on it.
Later, Neil#2 aka doodlebug

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lol. cant go wider, then go higher! :D

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Any updates Scott?

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Not much new really. Ordering & quality of parts is causing delays. I ordered the servo city sprockets that have the servo splines built in and they don't work at all because they are made wrong...when the chain wraps around the sprocket it grabs the chain and won't let go. They were supposed to send me "better" replacement sprockets a week ago and they never showed. I'll call Monday and talk to management there...:mad: So, I took 9 tooth metal sprockets and modified it to work on a servo. They run very smoothly and don't grab the sprocket at all. I'll probably make some progress on it this week though.

Re: Unit Cable Hoe
 

Maybe the small diameter is causing the grabbing. Anything smaller than 12t is not recommended at certain speeds but for your intermittent use you should be ok. Did you grind the teeth open some?

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The servo city sprockets are 10 tooth and the metal sprockets that I modified are 9 tooth and work great. The metal 9 tooth sprockets work so smoothly that I can drape an 8 inch loop of chain over it and run it just hanging there and it runs the chain fine, never grabs at all... The servo city sprockets have tall square teeth and I think that is the problem.

http://www.servocity.com/assets/imag...o_Sprocket.jpg

Re: Unit Cable Hoe
 

I made a quick vid of the chain drive working. I'll have to make a jig for drilling the track pads because the few that I made aren't consistent enough for my liking.

http://www.youtube.com/watch?v=8Lj4c_IDNAI

Re: Unit Cable Hoe
 

Looks like you have made some good progress Scott keep up the great work.

Travis

Re: Unit Cable Hoe
 

Hey Scott, Jig's are alway's nice to have for repetition. Sure helped when I was running an iron worker 25 year's ago. Later, Neil#2 aka doodlebug.

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Thanks Travis!

Agreed Neil.:)

Well, I called Servo City and they were very helpful. Turns out the #25 chain I am using has a smaller roller diameter (.120) than they use (.127) which would explain why my chain binds up when you wrap it around more than 100 degrees or so. They are sending me some of there #25 chain to rectify this. That is really good customer service! Even most good companies would say just send the parts back for a refund but, these guys want people to get there projects running.:)

Re: Unit Cable Hoe
 

SmallHaul-I used the servo city sprockets on my shovel and they worked great but I did also use their chain so I guess that explains the problem you had. Their servo sprockets were the only ones I could find that were small enough to get the ratio correct. Enjoying watching this build.