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  #101  
Old 02-07-2011, 08:47 PM
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Default 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.
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  #102  
Old 02-07-2011, 09:03 PM
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Default 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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  #103  
Old 02-07-2011, 09:07 PM
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Default Re: Unit Cable Hoe

Hey Scott, do you need the "arch on the boom"? Let me know!
Later, Neil#2 aka doodlebug
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  #104  
Old 02-07-2011, 09:16 PM
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Default Re: Unit Cable Hoe

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Originally Posted by doodlebug View Post
Hey Scott, do you need the "arch on the boom"? Let me know!
Later, Neil#2 aka doodlebug
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.
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  #105  
Old 02-07-2011, 10:02 PM
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Default Re: Unit Cable Hoe

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

IHSteve
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  #106  
Old 02-07-2011, 10:59 PM
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Default Re: Unit Cable Hoe

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

IHSteve
Steve, I think the 1/2" square tube is gonna be fine. Thanks for trying.
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  #107  
Old 02-08-2011, 01:48 AM
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Default 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
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  #108  
Old 02-08-2011, 08:20 PM
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Default 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
Attached Images
File Type: jpg CENTERBOOM1.jpg (6.2 KB, 35 views)
File Type: jpg CENTERBOOM2.jpg (4.2 KB, 29 views)
File Type: jpg CENTERBOOM3.jpg (6.0 KB, 28 views)
File Type: jpg TRACKS1.jpg (6.2 KB, 27 views)
File Type: jpg TRACKS2.jpg (9.7 KB, 28 views)
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  #109  
Old 02-08-2011, 08:43 PM
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Default 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.
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  #110  
Old 02-09-2011, 11:52 AM
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Default 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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  #111  
Old 02-09-2011, 07:39 PM
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Default Re: Unit Cable Hoe

lol. cant go wider, then go higher!
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  #112  
Old 02-20-2011, 04:46 PM
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Default Re: Unit Cable Hoe

Any updates Scott?
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  #113  
Old 02-20-2011, 06:08 PM
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Default Re: Unit Cable Hoe

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Any updates Scott?
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... 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.
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  #114  
Old 02-20-2011, 06:59 PM
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Default 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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  #115  
Old 02-20-2011, 07:28 PM
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Default Re: Unit Cable Hoe

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Originally Posted by 9W Monighan View Post
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?
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.

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  #116  
Old 02-20-2011, 08:17 PM
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Default 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
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  #117  
Old 02-20-2011, 08:55 PM
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Default Re: Unit Cable Hoe

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

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  #118  
Old 02-21-2011, 12:38 AM
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Default 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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  #119  
Old 02-21-2011, 11:18 AM
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Default Re: Unit Cable Hoe

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.
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  #120  
Old 02-21-2011, 12:42 PM
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Default 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.
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