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#1754169 - 01/24/10 06:40 PM Log Splitter Hydraulic Oil
Woodsroad Offline

Registered: 07/07/09
Posts: 6
Loc: SE PA
Any suggestions on fluid for a log splitter?
This splitter has a Haldex 2-stage 16 GPM pump and a 5" cylinder. The splitter came with a return filter only, I added a suction filter. I've run Hydra-Tranz in it from the start (45 hours now), only because it's what I had on hand at the time. Any other suggestions or information on what works best in this kind of application?


#1754200 - 01/24/10 07:15 PM Re: Log Splitter Hydraulic Oil [Re: Woodsroad]
salesrep Offline

Registered: 08/22/03
Posts: 3444
Loc: lllinois
I deal with a logsplitter co. and their factory fill is iso 46 and/or atf syn
Cliven Bundy

#1754921 - 01/25/10 10:58 AM Re: Log Splitter Hydraulic Oil [Re: salesrep]
Woodsroad Offline

Registered: 07/07/09
Posts: 6
Loc: SE PA
What would be the difference between Hydra-Tranz and synthetic ATF or an ISO 46 fluid?


#1754944 - 01/25/10 11:15 AM Re: Log Splitter Hydraulic Oil [Re: Woodsroad]
MolaKule Offline

Registered: 06/05/02
Posts: 18441
Loc: Iowegia - USA
What does your manf. specify in terms of an ISO viscosity for your hydraulic fluid?

Hydra-Tranz has an ISO 68 viscosity rating or about a 9.5 [email protected] or about a 30 weight.

A typical DexronIII/Mercon synthetic ATF has viscosity of about 7.5 cSt.

I prefer an ISO 46 to 68 synthetic or Blend hydraulic fluid since it contains a higher level of anti-wear additives.
"i" before "e" except after "c;" WEIRD, isn't it? smile

#1754991 - 01/25/10 11:51 AM Re: Log Splitter Hydraulic Oil [Re: MolaKule]
Woodsroad Offline

Registered: 07/07/09
Posts: 6
Loc: SE PA
The manufacturer does not make a specific recommendation on hydraulic oil.

#1800518 - 03/02/10 08:17 AM Re: Log Splitter Hydraulic Oil [Re: Woodsroad]
George Bynum Online   content

Registered: 12/18/04
Posts: 258
Loc: Greenville SC
Originally Posted By: Woodsroad
Any suggestions on fluid for a log splitter?
Generally any good heavy duty AW (antiwear) fluid, probalby in a "46" (ISO46) or "68" viscosity. Your system is positive displacement, that is the pump is always pumping fluid; you should let the oil warm to (OPINION) 90F at least before going to full pressure. Many people use ATF, not a bad choice really, but it, like most vehicle fluids captures and holds moisture; this is not a good characteristic for hydraulics. If you use it, change it every year or so.
Originally Posted By: Woodsroad
The splitter came with a return filter only, I added a suction filter.
Beware suction FILTER; if it is a strainer, ok. Restrictions and air ingression in inlets may destroy more pumps than anything else. Do note that your system always runs fluid through the return filter when the pump is turning, a good thing. You might look at the return filter specs and improve them; a Beta rated element, B(10)>50, should be sufficient for you. Those 25 micron paper media things are JUNK in hydraulic applications. What brand and part number is your return element?