D8R +463 in 1/5,6

[Cooper]

http://www.hobbyking.com/hobbyking/s...18sec_34g.html
Just some cheep low pro servos

[RCKiwi]

Hey Dan, This is quite the build and there's no doubt that none of us what to see you give in on this. As tracksntreadslou said; could you perhaps fabricate some smaller hydraulic fittings? The pipe work looks to dominate the rear section. Given the thread sizes, it was no doubt easy to pick "off the shelf" fittings for plumbing it up, but i'm sure a man like you with such skill could miniturise some of the bigger fittings. Perhaps it may hinder flow rates and performance to some extent, but would result in better setup of the servo's, etc........

Keep at it buddy!

[kerst]

Hi Dan

This is a great model with fantastic engineering.
I know what you mean when you think the problems can't be solved. But don't give up!
Let it sink in, give it time, then you will find solutions and make it a better model.
See it as an engineering challenge.

Kerst

[9W Monighan]

Hey Dan, Like everyone has said; DON'T GIVE UP! I want to see this model work too. I know it's fun to operate a model but Modelman has said in the past to me that building it and the challenge is more fun than just operating it. I have found that out with my dragline. Once this is figured out you will be able to say; "I've been there and done that"
With my model as time went by and more information was acquired, there are parts earlier on in the build I made that I could go back and re do to make it even better. So with your trial and error now you know what you have to do and I know you can do it! Who cares how long it takes, This is supposed to be your hobby to relax. There isn't some customer who has no knowledge of what it takes to do something breathing down your neck wanting it done NOW!

[Espeefan]

Sorry to read about your frustrations! It's such a nice model I'd hate to see you give up too. Sometimes you just have to take a step back and work on another project that can give you some level of satisfaction and accomplishment, while thinking of ideas and solutions to the problems with the model. You'll get it figured out! You've made it this far, and have overcome what I think would be the biggest hurdle already. This part of the project is just fine tuning. It's a pain to have to redesign and revamp things, but if you can come up with a better way, go for it! You'll be glad you did in the end.

[D8R]

Thanks all friends here at RC T&C for nice words and suggestions. You are probably right that this is a part of the process building from scratch. But I thought I had ovecomed this stage now but obvius I havn't.
Next step will be to clean everything and move model inside workshop again. Have some ideas that needs to be checked, will keep you updated. Will go to us within 2 weeks to visit ATHS truck show in MO, that will be a nice break.
I'm a little afraid to start another modeling project, I have already one decided but will try to stick with this one a little more.
Thanks again, will remember your comments when hands full of oil!
Dan

[D8R]

Finally got some inspiration to start with the model again.
All connections between the valves and hydraulic motors replaced with new parts. Those banjos are little smaller making it possible to keep the bigger servos (the blue ones) for blade and ripper functions. All tubing had to be redone to, changing here to a little smaller diameters.

Now remove and mount everything again, install lower oiltank, engine, pumps and outside oiltank (fueltank in 1:1). As you see, tracks and hubs removed to be able removing hydraulic motors. Have got a lot paint damages on frame, it was painted with 2 component paint, it's chipping. Guess something gone wrong with the primer, bare metal shown Most other part with 1 c paint with out problem
/dan

[Jared]

Good to see some progress, Dan. I was wondering about this build the other day.

[Lil Giants]

Great to see you working on this again Dan.

Hopefully you've overcome some of the prior issues you had before & this model works they way you want it to now.

[Wiskybilt]

how is it coming Dan? very curious how the solenoids are working out. I have an old t66 davis track ditch witch that could use some of this technology. I would like to convert it and make it autonomous with a flailing mower for steeper pasture ground.

[D8R]

Sorry Wiskybilt, have no report from tests yet. Got another problem yesterday when remounting the return oilhose system, didn't fit. This due to the relocated valves. Will have to redo the connection to rear oiltank or find a smarter way to connect this tank to return system.
/dan

[Wiskybilt]

I'll keep checking. Can you use hard line to create more space?

[D8R]

Your right, checking now how to find alternative route for a 15mm pipe instead of hose. Thanks for all comments!

[D8R]

New piping tested. There's low pressure on return side, that's why I use copper tubes instead of steel (easier to work/bend and bigger inside diameter).
Final adjustment today, then solder everything together
20150602_201440 by DgS Persson, on Flickr

[Wiskybilt]

Looking goood�� hope to see it moving some dirt for you real soon!

[D8R]

Sloooooowwwwlyyyy coming together. One problem fixed results in another one!
Did find some small LED lamps that will be shortened and connected to wires instead of batteries.


Pressure hose 1/2" to long, have to get a new one tomorrow


All cylinder heads reworked. Gasket was wrongly placed just inside cleaning gasket. Will now be inside head and not possible to pop out when cylinder comes in end position. Today it's seems so unlogical to place it where I did from start but still learning

[Wiskybilt]

Glad to see it working out for you. Seems like your looking a little closer to the finish line. That alone can be rewarding and disappointing at the same time.

[D8R]

A short update:
Did try out latest changes yesterday, only to discover some leaks in 2 of the cylinders connections. Honda engine did not run well either, felt very weak.
So still no dirt moving, will probably leave machine at a friend to investigate what's coursing the problems.
Dan

[9W Monighan]

Would that friend be in the United States?

[D8R]

Originally Posted by 9W Monighan

Would that friend be in the United States?

Guess you would be happy then, but sorry to say, it will still be in Sweden.
If I/we get it up and running it would of course be a challange to send it over to us to parcitipate at some shows.