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  #21  
Old 02-11-2020, 07:41 PM
twoton twoton is offline
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Good to see your progress and that you've recovered from your injuries.
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  #22  
Old 02-13-2020, 06:46 PM
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sawdustdad sawdustdad is offline
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Good to see your progress and that you've recovered from your injuries.
Thank you. I'm about 95%. Still some range of motion limitations behind my back from the rotator cuff surgery. But mostly doing everything as before.

Update on the grader build. I've spent the past week mounting the fuel tank, carb, starter, etc, then extending the wiring harness, choke and throttle cables to the rear. Everything's hooked up and works from the existing dash.

Turns out the starter is not strong enough to start the engine with the two hydros attached. Not sure why because I did not have this issue with the Tandem I built two years ago. And the tandem also had a hydraulic pump in line as well. It starts easily, even when cold.

I tried a different starter, no improvement. I disconnected the drive belt and the engine started instantly and ran great. It's a new overhaul, so first start is always very satisfying. I hooked up the drive belt and using two batteries in parallel got the engine started, and it ran fine. But subsequent start attempts did not go well. Just too much drag on the starter.

I have to adjust the tie rod between these two hydros as they are clearly not sync'd. With the axles in the air on jack stands, it's easy to tell. I don't think that is causing excess drag as each axle is free to spin independently.

My plan now is to install the PTO clutch throw-out arm and use that to disengage the PTO to make starting easier.

I'm looking at a hydraulic pump/motor set up but that complicates things a bunch but also solves some issues. Will keep working with the belt drive for the time being and see how it goes but I don't have high confidence in it.
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  #23  
Old 02-14-2020, 07:11 AM
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sawdustdad, just musing about your starting woes, you never mentioned the operational status of the donor tractors.....
could it be that one of the hydro pumps has an internal issue and is providing more drag than it should?
Maybe if you remove the spirol pin from the coupler on the front hydro so the driveshaft is free to spin,
try starter again and see if it turns any easier with just one hydro to spin.
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  #24  
Old 02-17-2020, 09:53 PM
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sawdustdad sawdustdad is offline
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Originally Posted by ironman View Post
sawdustdad, just musing about your starting woes, you never mentioned the operational status of the donor tractors.....
could it be that one of the hydro pumps has an internal issue and is providing more drag than it should?
Maybe if you remove the spirol pin from the coupler on the front hydro so the driveshaft is free to spin,
try starter again and see if it turns any easier with just one hydro to spin.
Both donor tractors started and ran fine prior to this point.
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  #25  
Old 02-23-2020, 10:02 PM
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sawdustdad sawdustdad is offline
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Here's a video of the grader rear end test run.

https://www.youtube.com/watch?v=on1QGGCEQIg
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  #26  
Old 02-23-2020, 11:06 PM
guido guido is offline
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Very cool Frank. Looking forward to seeing the front end.
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  #27  
Old 02-24-2020, 08:02 AM
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Here's a video of the grader rear end test run.

https://www.facebook.com/frank.timpa...2480012555017/
I guess the "un-social" media members of this forum are outta luck on this viewing?
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  #28  
Old 02-24-2020, 08:04 AM
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sawdustdad sawdustdad is offline
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I guess the "un-social" media members of this forum are outta luck on this viewing?
I will upload the video to youtube shortly...and repost a new link.
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  #29  
Old 02-24-2020, 09:24 AM
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For the non-social (media) types...

https://www.youtube.com/watch?v=on1QGGCEQIg

I will add that you'll see no turns in this video because with no weight up front, there was virtually no steering control...
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  #30  
Old 02-24-2020, 07:01 PM
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Great looking machine !
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