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08-30-2008, 05:52 PM
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#21 (permalink)
| | Senior Member
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Quote:
Originally Posted by Dougster  ~ snip~
All that being said, suction side air inleakage still seems to be the number one reported culprit in cases of observed/perceived FEL weakness... and one of the very first things to check!!! 
Dougster™  | Suction side air (vacuum?) leakage...mmm, what's the test procedure for that? |
.... Tim | |
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08-30-2008, 08:58 PM
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#22 (permalink)
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Posts: 2,169
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Quote:
Originally Posted by irwin Suction side air (vacuum?) leakage...mmm, what's the test procedure for that? | Yep... a little air seeping in on the suction side and hydraulic performance goes into the crapper bigtime.  I was told to look for very minute signs of oil leakage... often too small to even leave a drop on the garage floor... but perhaps enough to "wet" the suspect hose-to-metal tubing connection. There is no specific diagnostic test that I am aware of... but the solution is pretty simple: clean and tighten up any and all suction side hose clamps!
Dougster™
p.s., I have heard that even a little excess paint at a connection point can be the cause of such a tiny air inleakage. -d | | | |
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08-30-2008, 09:37 PM
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#23 (permalink)
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Quote:
Originally Posted by Dougster Yep... a little air seeping in on the suction side and hydraulic performance goes into the crapper bigtime. I was told to look for very minute signs of oil leakage... often too small to even leave a drop on the garage floor... but perhaps enough to "wet" the suspect hose-to-metal tubing connection. There is no specific diagnostic test that I am aware of... but the solution is pretty simple: clean and tighten up any and all suction side hose clamps!
Dougster™
p.s., I have heard that even a little excess paint at a connection point can be the cause of such a tiny air inleakage. -d | My backhoe appears to be strong enough.. but the movement seems slower than what I expected, I think I remember the other L35 I tried worked faster..but my memory seems to be a bit slow too  .
My concern is the loader. I might be mis-judging the weight of a few boulders. the loader couldn't get them up an inch while the backhoe did a little better.
The rock in these pics was too much for the loader to lift, I could move it around (flip it over).. the backhoe was more up to the task, it was just able to get it off the ground.
Now I ask you, does that stone look like it pushes the scale to 3/4 ton? 
(No,.. that's not an oversized novelty cap, but it is adjusted to it's fullest to fit my fat head.  ) |
.... Tim | |
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08-30-2008, 10:47 PM
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#24 (permalink)
| | Rara Avis
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Posts: 2,007
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Quote:
Originally Posted by mickey well, for a moment i thought my comments were being overlooked as i said this subject was outside my comfort zone.
imo all static pressure is going to tell you is, the set point of the releif valve(s). Depending upon how things are plumbed, restrictions in the current arrangement could be limiting flow and revising the plumbing could inmprove things. Think dynamic pressure is going to be an interaction between pump flow, cyl capacity, resistance in the plumbing and applied load.
It's not clear to me what you are trying to accomplish. Improved capacity or improved speed of movement. Whacha trying to improve doug? | Yes...What he said...
Dynamic testing is what the pros use to check systems...  |
Paul in VT
I used to own an ant farm but had to give it up. I couldn't find tractors small enough to fit it.
-- Steven Wright | |
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08-30-2008, 11:17 PM
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#25 (permalink)
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Quote:
Originally Posted by irwin Now I ask you, does that stone look like it pushes the scale to 3/4 ton? | Measure it and let's do us a calc! 
Dougster™ | | | |
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08-31-2008, 10:05 AM
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#26 (permalink)
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Quote:
Originally Posted by Dougster Measure it and let's do us a calc!
Dougster™ | Just finished burying it, I'm not digging it back up !  |
.... Tim | |
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08-31-2008, 10:23 AM
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#27 (permalink)
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Quote:
Originally Posted by irwin Just finished burying it, I'm not digging it back up ! | Ha!!!  Well, you can estimate it's weight based on 170 lbs/cubic foot (plus or minus 20 lbs/cubic foot) for solid rock.
Or put another way, was it more than 9 cubic feet in volume???  That's roughly 40 inches average diameter.
Or perhaps are you just not accounting for the rock's significantly forward-of-pivot pins center of gravity?
Dougster™ | | | |
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08-31-2008, 03:06 PM
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#28 (permalink)
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Quote:
Originally Posted by Dougster Ha!!! Well, you can estimate it's weight based on 170 lbs/cubic foot (plus or minus 20 lbs/cubic foot) for solid rock.
Or put another way, was it more than 9 cubic feet in volume??? That's roughly 40 inches average diameter.
Or perhaps are you just not accounting for the rock's significantly forward-of-pivot pins center of gravity?
Dougster™ | Alright...so your saying a solid rock ball 40" in diameter weighs about fifteen hundred pounds? If that's the case than that rock was near the 3/4 ton mark, add 490 lbs for the grapple add to that another foot or two forward of the pivot pins, that could be outside the abilities of the loader.  .
.  |
.... Tim | |
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08-31-2008, 04:11 PM
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#29 (permalink)
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Quote:
Originally Posted by irwin Alright...so your saying a solid rock ball 40" in diameter weighs about fifteen hundred pounds? If that's the case than that rock was near the 3/4 ton mark, add 490 lbs for the grapple add to that another foot or two forward of the pivot pins, that could be outside the abilities of the loader. | If it wasn't there (or over), it certainly didn't miss it by much! And you tried to pick it up with your mega-hefty grapple??? 
Between the weight of the rock, the weight of the grapple, and the CG of the two... well, let me guess: Your rear tires were airborne!!! 
Dougster™ | | | |
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08-31-2008, 06:23 PM
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#30 (permalink)
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.... Tim | |
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