Lieutenant Dan
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How's this......
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LDS Hydraulic Pump Powering a Hmmwv Hydraulic Winch
- Thread starter Lieutenant Dan
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Lieutenant Dan
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Do you guys think it is cavitation or the pump is bad?
welldigger
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I believe that's just a gear pump. I have replaced worn out gear pumps that didn't make much more noise than a new pump. They leaked more than anything.
welldigger
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Does the intake port on your oil tank have a screen in it? I watched your 3rd video and that sounds like fluid starvation to me. I had a ditching machine that the suction screen clogged and that's exactly what it sounded like when you reved it up and tried to engage the digging chain.
Lieutenant Dan
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No the screen is on the return port not the suction and I don't have it in right now. It's also a vain pump
welldigger
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Ah. Hmm. I don't have much experience with vain pumps.
Jeepsinker
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Idk man, some pumps just whine. If it is pumping fluid and not making metal flakes I'd run it. The whole truck rattles anyway..
welldigger
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Have you contacted m35tom? He has a lot of experience with this particular pump.
gimpyrobb
dumpsterlandingfromorbit!
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He has.
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I think we've found most of the problem. Until you get the oil to quit foaming, the setup will never work right.
With how you had the gauge installed, even if everything is working like it should, the gauge should read near zero.
rustystud
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It is still cavitating Dan. I have worked with a lot of vane pumps and that is what it is doing. You must put the return line in the top of the tank. Keep the suction line on the bottom where it is. Let your system settle down overnight and check the fluid level in the morning. You should be able to fill the system to the proper level and then run it, after you reroute that return line. One good thing, vane pumps can take cavitating better then gear pumps.
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I have to disagree with this. I've have run into problems on systems before where the return dumped into the top of the tank. You can create bubbles in the fluid when the return fluid free falls into the fluid in the sump. It's ok to run the return into the side of the tank but it needs to be below the fluid level.
rustystud
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When I said to put the return line in the top I didn't mean drop it in. If you read my previous post you will see I said put it just below the full line. I just got lazy with my typing in the last post. In his situation with a small tank like that it is better then returning the fluid to the bottom where the suction line will pick it up so fast.
Lieutenant Dan
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So I welded the fitting in the tank for the suction hose. I left the return line fitting where it is because it is actually baffled in side the tank. The whine is gone and the winch works great. Now the only problem I have is the new suction fitting I have leaks.
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rustystud
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Complain, complain, complain ! That's all you do Dan ! LOL !!! Glad to hear it's working now !
gimpyrobb
dumpsterlandingfromorbit!
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Sounds to me like someone doesn't know how to weld!
Just razzing ya, glad to hear its working.
Just razzing ya, glad to hear its working.
Lieutenant Dan
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No no no lol the fitting into the pump...... I cheaped out and got a Chinese black iron street elbow from lowes and go figure it leaks.
rustystud
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Can you even buy a fitting that is NOT made in China anymore ?
welldigger
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Yes. At triple the cost.
Lieutenant Dan
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I'm going to put a brass fitting in it. what sucks is now I probably have to take the fender back off to fix it.