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  #81  
Old 11-14-2013, 08:46 PM
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YellowDogSVC YellowDogSVC is offline
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Quote:
Originally Posted by AWJ Services View Post
What rpm does the head turn unloaded?
supposed to be 2100
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  #82  
Old 11-15-2013, 08:21 AM
AWJ Services AWJ Services is offline
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Quote:
Originally Posted by mxridernorth View Post
Here is the plot for the data provided for the T770. Notice the linear drop in pressure from 0 - 31.2 gpm? The pressure decrease over this range is only 800 psi. Clearly this is not exponential as you declared earlier. Would you like me to plot this on a log graph?
Attachment 281274

I don't have the schematic for the T770 but apparently from the brochure it runs gear pumps. A gear pump is a fixed displacement pump. The aux flow apparently has two configurations: variable flow and max flow. Which mode was the aux circuit running in? What was the rpms that the flow was taken at?

Get me the hydraulic schematics and I'll tell you what is going on.
So take the graph from 0 too relief? is it still linear?

Hey never let the facts get in a way of a good story!
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  #83  
Old 11-15-2013, 12:13 PM
mxridernorth mxridernorth is offline
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I declare the subject flogged to death. But here's another: hey, did you know the world isn't flat?
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  #84  
Old 11-15-2013, 06:08 PM
AWJ Services AWJ Services is offline
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Well I am glad we have met your expectations and as far as the earth being flat it seems physics is much different in Canada?
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  #85  
Old 11-16-2013, 10:08 AM
AWJ Services AWJ Services is offline
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Quote:
Originally Posted by Digdeep View Post
I spoke to the svc manager. The machine is in spec- all reliefs are correct, the oil was at about 160 degrees and theachine was at Max engine rpm when he started turning the valve to increase resistance through the flow meter. The reason that there is a "linear drop" is because he stopped at every 100psi to log the flow.

He has reinforced what I was saying in that none of the high flow machines he has ever put a flow meter to will put out the high flow gpm shown on the brochure at te max pressure listed on that same brochure. I've known this guy since I was selling Bobcat machines in my past life and he doesn't have a dog in this hunt so the numbers are what they are.
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Could you get your friend too flow a Min ex in the 5-6 ton range?
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  #86  
Old 11-18-2013, 04:35 PM
Digdeep Digdeep is offline
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Originally Posted by AWJ Services View Post
Could you get your friend too flow a Min ex in the 5-6 ton range?
I'll surely ask.
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  #87  
Old 11-18-2013, 06:42 PM
AWJ Services AWJ Services is offline
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Quote:
Originally Posted by Digdeep View Post
I'll surely ask.
Thanks. Bobcat has made such an improvment on there Mini ex's I am curious how the aux flow is. The E60 advertises 26 gpm which would be pretty darn good. The E80 advertises 31 gpm. Both specs are at the top of there class.
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