Log Splitter Question...

[/pine]

My splitter is set up on a site and not on wheels...I am getting around to putting together the power unit and not have to rely on a tractor for hydraulic power...

Planning on using a 2 stage 13 GPM pump with a direct drive connection to a 212CC predator engine...planning on a 10 gal. reservoir tank...

Any recommendations on the type of filter?...return or outlet side?...should I also use a (screw in) strainer on the outlet port of the tank?

 

[WranglerX]

MY wheeled splitter (picked up used and broken) uses a strainer on suction side between tank and pump, and uses a filter on out port of control valve as hydraulic oil returns to tank... Seem pretty typical....

Could never find out specs on pump, but splitter had a 5 hp R&S on it that had broken carb and other problems, and it was cheaper to put a 6.5 hp Predictor Motor on it then to find parts and get Briggs running.... Can replace HF motor 3 times for what a single Briggs or Honda costs... Not a fan of Chinese but it works fo my purposes...

Hydraulics - Hydraulic Filters - Filter Assemblies - Surplus Center

www.surpluscenter.com

Hydraulics - Hydraulic Filters - Strainers - Surplus Center

www.surpluscenter.com

Lots of general hydraulic stuff...

Hydraulics | www.surpluscenter.com

Hydraulics,Hydraulic Cylinders,Log Splitters and Components,Hydraulic Motors,Hydraulic Pumps,Hydraulic Valves,Hydraulic Power Units,Hydraulic

www.surpluscenter.com

Dale

 

[/pine]

MY wheeled splitter (picked up used and broken) uses a strainer on suction side between tank and pump, and uses a filter on out port of control valve as hydraulic oil returns to tank... Seem pretty typical....

Could never find out specs on pump, but splitter had a 5 hp R&S on it that had broken carb and other problems, and it was cheaper to put a 6.5 hp Predictor Motor on it then to find parts and get Briggs running.... Can replace HF motor 3 times for what a single Briggs or Honda costs... Not a fan of Chinese but it works fo my purposes...

Hydraulics - Hydraulic Filters - Filter Assemblies - Surplus Center

www.surpluscenter.com

Hydraulics - Hydraulic Filters - Strainers - Surplus Center

www.surpluscenter.com

Lots of general hydraulic stuff...

Hydraulics | www.surpluscenter.com

Hydraulics,Hydraulic Cylinders,Log Splitters and Components,Hydraulic Motors,Hydraulic Pumps,Hydraulic Valves,Hydraulic Power Units,Hydraulic

www.surpluscenter.com

Dale

Thanks...I did do a lot of research on the Surplus Center site and catalog...buying most of the stuff on e-bay...same product but save a good bit on shipping...

I did find a basic common plumbing diagram...It makes sense to put the filter on the return line but I kept seeing a gpm rating on the canister type filter heads...didn't really think about it...

The Predator should reduce my fuel consumption...I had been running the splitter off a 45 HP diesel...

FWIW...there are two models of the 212 CC Predators...one has a Hemi head the other does not...you have to check the model numbers...also the valve covers are different...

 

[Rich B1]

I am not a fan of strainers. They can actually cause cavitation under some conditions. Plus a strainer can only stop chunks.

A good return line filter is, IMO, the most efficient way to filter hydraulic oil. Make sure you flow rate of the filter is greater than your pump capacity and you will be good. Also make sure your tank breather is filtered to keep air that enters the tank clean too.

 

[SylvainG]

Why not put the filter on the output port of the tank? That way you're sure the oil reaching the pump is clean. That's where the filter is on my 20T wood splitter.

 

[PILOON]

Most hydraulic filters would have to be on the return line due to pressure limitations.
Rare is a filter housing that can withstand pressures in the 3000 +/- PSI ranges.
(OK, some are found in aviation but rather rare.)
Also you mainly want to protect your pump rather than the cylinder.

 

[SylvainG]

I understand but the output port of the tank (ie, before entering the pump) is low pressure, no? It's only once it leaves the pump that it becomes pressurized. At least, that's how I understand it.

 

[triptester]

All filters and strainers used should be rated double the pump capacity, to prevent cavitation with suction filters and bypassing with return filters.

 

[WranglerX]

Thanks...I did do a lot of research on the Surplus Center site and catalog...buying most of the stuff on e-bay...same product but save a good bit on shipping...

I did find a basic common plumbing diagram...It makes sense to put the filter on the return line but I kept seeing a gpm rating on the canister type filter heads...didn't really think about it...

The Predator should reduce my fuel consumption...I had been running the splitter off a 45 HP diesel...

FWIW...there are two models of the 212 CC Predators...one has a Hemi head the other does not...you have to check the model numbers...also the valve covers are different...

This s HF motor I used... Harbor Freight Predator 6.5 HP - 212cc - OHV (SKU 69727)
Seems adequate, though my splitter is rated at only 22 ton... Motor does grunt for a moment when pump drops in to secondary (?) mode and governor needs to play catch up...... But not a functional issue...

This was graphic I found, but does not show strainer in suction side...

Dale

 

[SylvainG]

This is the part diagram of mine. Filter is #53. You can see it located at the tank before feeding the pump. To me, this is the best place for a filter (well, outside of the tank would be better so it's easier to change). It's low pressure and any impurity in the tank is filtered through before reaching the pump. The hydraulic diagram above makes no sense to me. Why would you filter the fluid AFTER it went into the pump?

 

[WranglerX]

You can call it a filter and parts list may call it a filter, but by design and placement its a strainer...

And having a filter after control valve and before tank its on 'low pressure" side (easier to prevents canister bursts) and it is readily accessed to change ... Not like having to deal with all the fluids in tank when trying to clean strainer between tank and pump....

Edited to note: his is incorrect graphic for my splitter, graphics is for DUERR 622/623.... My splitter is a DUERR 620...

Dale

 

[SylvainG]

Ok, looking at your diagram, #58 is your filter connected to hose 'B' and hose 'C' is the input hose to the tank ('A' being to output hose to the valve). There is no 'strainer' between tank and pump. Again, to me, this makes no sense. Why would you let possibly dirty oil enter the pump (dirt could come from oil being poured in, through the breather cap or simply rust particles pealing from inside the tank) and then filter it? The damage is already done.

From my understanding, hose 'C' is also low pressure, only hose 'A' and the hoses going to each cylinder ends are high pressure so strainer/filter attached to the tank before the pump is on low pressure, not high.

My manual mentions replacing the filter when changing oil, so dealing with replacing the filter with a full tank is a non issue. Beside, why would you clean it between oil change? If it's clogged, that means those particles already went through your pump because there is nothing preventing them from reaching it.

 

[WranglerX]

OK.... I see you comment and it made me look at graphic again...... BUT graphic I posted above was in error, it was for DUERR Model 622/623....

Corrected image (below ) is for a DUERR Model 620 which is actually what I have... Please note strainer at tank outlet (#25) and a 10 Micron filter (#27) where fluid return to tank....Obviously the engineers who designed you splitter, and the engineers who designed my splitter went to different engineering/hydraulics schools....

Sorry if the misinformation in previous post confused anyone....

Dale

 

[SylvainG]

Actually, different engineers designed the DUERR splitters since some models don't even have a strainer I'm wondering if some beans counter dropped the strainer from some models to reduce the cost because I doubt a engineers would design one without any protection before entering the pump!

Edit: It's interesting that in the theory of operation of your splitter (page 15), they don't mention the return oil filter and call the strainer a filter. Talk about wanting to confuse people lol.

 

[/pine]

At any rate...I'm going to use a suction side strainer (see link below) and a canister type filter on the return line to the tank... will maybe mount the filter directly to the tank...

I'm still shopping around for the return line filter head/assembly...any recommendations on one with a good, common replacement canister ??

here is the strainer:

https://www.northerntool.com/shop/tools/product_200675168_200675168?cm_mmc=Google-pla&utm_source=Google_PLA&utm_medium=Hydraulics%20%3E%20Hydraulic%20Accessories&utm_campaign=Buyers%20Products&utm_content=56984&gclid=EAIaIQobChMIjonXzfCw7wIVxgeICR1UgQz1EAYYASABEgKAE_D_BwE&gclsrc=aw.ds

 

[SylvainG]

Using DL Meisen owner's manual, I got the part number of his splitter filter head. It's "723-0406 filter head" Googling that gave some good results. If it works great on a two stage pump (high and low flow), I don't see why it wouldn't work for yours.

 

[/pine]

I'm shopping here and checking prices and shipping for the same...
It's funny the size jumps from 3/4 to 11/4 and skips 1" which is what the return port on my tank is...I want to hard pipe the filter head directly to the tank...

Hydraulics - Hydraulic Filters - Filter Assemblies - Surplus Center

www.surpluscenter.com

 

[WranglerX]

Using DL Meisen owner's manual, I got the part number of his splitter filter head. It's "723-0406 filter head" Googling that gave some good results. If it works great on a two stage pump (high and low flow), I don't see why it wouldn't work for yours.

Not exactly sure but I have sneaking suspicion that MTD made splitters for DUERR..... I see a lot of part number on my DUERR are matches to MDT number and same as "other" splitters also, I believe MDT is main manufacturer and makes may brands under contract...

Dale

 

[WranglerX]

I'm shopping here and checking prices and shipping for the same...
It's funny the size jumps from 3/4 to 11/4 and skips 1" which is what the return port on my tank is...I want to hard pipe the filter head directly to the tank...

Hydraulics - Hydraulic Filters - Filter Assemblies - Surplus Center

www.surpluscenter.com

Get the 3/4 inch NPT body and use a nipple and reducer to fit 3/4 inch filter assembly to 1 inch tank bung...

1" NPT Male x 3/4" NPT Female Straight 5406-16-12 Adapter | NPT Female to NPT Male - Bushing | NPT to NPT | Hydraulic Adapters & Fittings | Hydraulics | www.surpluscenter.com

1 NPT Male x 3/4 NPT Female Straight 5406-16-12 Adapter, NPT Female to NPT Male - Bushing, 1 NPT TO 3/4 NPT BUSHING, 1&quot NPT Male x 3/4&quot NPT5406-16-12,

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3/4" NPT Male x 3/4" NPT Male Straight 5404-12-12 Adapter | NPT Male to NPT Male - Hex Nipple | NPT to NPT | Hydraulic Adapters & Fittings | Hydraulics | www.surpluscenter.com

3/4 NPT Male x 3/4 NPT Male Straight 5404-12-12 Adapter, NPT Male to NPT Male - Hex Nipple, 3/4 NPT HEX NIPPLE, 3/4&quot NPT Male x 3/4&quot NPT5404-12-12,

www.surpluscenter.com

My splitter uses all 3/4 inch on return side...

Dale

 

[/pine]

Since the return port is close to the bottom of the tank I will have to add a couple of elbows and a short piece of pipe (riser) to keep the filter above the bottom of the tank...figure 1" is a little stouter for supporting the filter and return hose...

Now I'm working on how to configure the engine/pump and the tank etc. and how to mount it all together on a platform or something...once the tank is full of oil it won't be light...will likely make a steel base frame then bolt that to a pallet or skids so I can move it with 3ph pallet forks...

When I was running the splitter off a tractor I was using a set of 20' hoses...so I can do the same thing and keep the engine/pump/tank a little ways away from the splitter so it's not so loud and can keep the exhaust down wind etc...