Hydraulic Return Line Filter question/problem

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mgysgthath

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Dec 15, 2009
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Edit: After reading/thinking/asking more, I don't think that tank is going to work. 2" seems too big to neck down to a 3/4" port. Will a 1" hose clamp (safely) on to a 3/4" inlet at the pump side? Or do i need a tank with a 3/4" suction line opening?

Hey guys,

I'm sourcing parts for my hydraulic build still, and I've run into a snag. I have most things picked out finally, but the best tank I've found for the money is this:
http://www.northerntool.com/shop/tools/product_200466865_200466865
Which has a 1" return port and 2" suction port.

Baton's book highly recommends various filters, all of which I've sourced except the return line filter. They all seem to be either 3/4" NPT or 1 1/4" NPT - no 1 INCH ones.
Northern recommended this: http://www.northerntool.com/shop/tools/product_124313_124313
Which is a fuel filter designed for gas/diesel.. I'm not sure if it's appropriate for hydraulic oil, but it IS 1".

Princess Auto has a couple tanks.. but they don't list any of the specs hardly so I can't be sure filters will match etc. I'm ordering the cylinder from northern anyway, so I can get the rest of the items there that I'm sure will match. The only wildcard is this dang filter.

Can someone shed some light on this? Or should I just look for another tank/filters setup? Or should I skip the return line filter and hope the suction strainer in the tank will pick up any crud on the return trip to the pump?

Thanks all!

Afterthought: Will the 2" suction be a problem? It seems pumps use the 3/4" inlet.
 
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Both of the ports on that tank have female NPT threads. Very easy to put a 2" npt to 3/4" bushing in the suction port.

And, in the return line, use an oil filter with 3/4" ports, then use a 3/4" barb to 1" npt adapter fitting into the tank.

I think a filter for gasoline would not allow the correct flow rate for hydraulic oil.
 
Also, FWIW, use the largest suction line to the pump that you can get. It will be better to reduce it down at the pump, not the tank. I would use 1" to 1.5". This will allow the pump to work without starvation.


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Thanks Salem. I'm still a bit confused with all these adapters, I have not worked with them before. I can't seem to find a 2" to 3/4" bushing, but i did find this princess auto tank with a 1 1/4" NPT outlet, and this 1 1/4" to 3/4" NPTF Bushing, do you think that would work?

Tank: http://www.princessauto.com/pal/product/8318354/Reservoirs/10-Gallon-Oil-Reservoir -- buggers give you almost zilch for information.. like return line inlet size for example..
Bushing: http://www.princessauto.com/pal/pro...Size-Adaptors/1-1/4"-NPTM-x-3/4"-NPTF-Bushing

I'm a bit confused by 3/4" barb to 1" npt. I need to call PA on Monday and get the proper specs on that tank, I might not need to adapt anything except the outlet with that bushing.

Thanks Stacy, that is about what Batson says in his book as well, except he recommended 3/4" to 1". But 3/4" at the pump to 1 1/4" at the tank outlet (assuming this bushing will work) in this case seems like it should be okay?

I still have to look at nipples and inserts (jokes aside, lol) and figure out what I need there as well.
Thanks you guys for your help, the stores themselves aren't very helpful at all..

EDIT: I googled PA's SKU# for the tank, and I found a website that no longer exists, but google's cache of it still did. It indicated that the tank is 1 1/4" NPT in and out, so if that is correct the bushing hopefully will work. This may be the ticket, as the tank was also indicated to have a 150 micro filter in the breather cap, as well as a temp gauge which can be seen in the PA page. I'll still confirm with them monday, but bushings aside I think that looks like the best bet right now.
 
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mgysgthath said:
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Click to expand...



It's a good idea, an air filter that keeps the dust out of the air sucked in.


With those reducer bushings on the punp inlet side, the one you linked to is steel.

Since pressure is not such an issue on the inlet side,
You can also get brass ones that may seal better, or some apart again later if you need to service.

Proper plumbers and plumbing supply distributors have more in stock than princess auto or hardware stores will have.
 
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