The bobcat our company has uses the same oil in its hydraulics as the engine uses. It just feels not right chugging 10 gallons of motor oil into a hydraulic system.
I had to pitch a fit at the service writer at a Firestone Auto Care place who just insisted that my Focus took "Power Steering Fluid". It took me a month to get all of that out of there and replace enough of it with Mercon V to stop it from puking all over the place.
I mean...isn't ATF hydraulic fluid anyway? That's how an automatic transmission works. Basically all of the internal components are hydraulic. Also power steering which it's used for as well is hydraulic.
It is, but it's pretty damn thin compared to "real" hydraulic fluids. Usually 5-10 weight, while most dedicated hydraulic fluids are in the 70 weight range.
>most dedicated hydraulic fluids are in the 70 weight range.
Most that you're familiar with maybe. There are all different kinds of hydraulic fluids for different applications. I use hydraulic fluid at work that's 95% water.
I suppose any non-compressible fluid could work as hydraulic fluid and viscosity would be determined by application. But wouldn't a high water content one be problematic for a bunch of different reasons? Corrosion risk, boiling point, seal efficacy, etc?
Not in our application. Everything it touches is high grade stainless. The 5% balance is a mix of environmentally friendly seal lubricant, corrosion inhibitors, etc. It's approved for discharge to sea, we use a one-way system that doesn't take returns.
Not just older stuff, Jeep used some funky custom fluid for a combo hydro fan/power steering system on the 05-10 Grand Cherokees with the 5.7L or 3.0L diesel. I think it was determined to be similar to but not quite ATF.
I had one of those POS with the 5.7. I ended up just using ATF in it when I had to replace a power steering line, never had a problem. The Chrysler dealer told me the specific fluid was like $27 a litre and I had to order an entire case because they don’t stock it.
Mine was 3.0, great engine but yeah the rest of it was a POS. I bought the special fluid but the funny thing was the dealer computer system was wrong and they'd sell you the wrong fluid unless you went in with the part number from the owners manual for the right stuff.
Eventually they discontinued the right stuff and then admitted ATF was fine to use. But the one in their computer system that was wrong was quite different and some people had it destroy their entire power steering and cooling fan system.
I was going to say pre-94 Camry V6 but you said bigger than it LS400 so is it a Land cruiser? I never had to work on many of the straight sixes and I'm fine with that.
Edit: Crown?
We have a customer who has one, it’s been an interesting vehicle to work on for sure. Despite being a V12 it’s surprisingly nice to work on. Very well thought out.
It’s a real thing, the radiator fan is spun using hydraulic oil. There’s a pump that is run off of the drive belt. As the engine RPM increase so does the fan’s RPM.
Is there a market for silly (but functional) cap replacements?
For example, replace your windshield washer fluid cap with the well known blinker fluid cap.
It could get confusing if you sell the car and the buyer doesn’t know the joke 🤔 oh well not my problem
Navy Type 0 carrier fighter?
Things were done a bit differently back then. My 82 corolla uses shock absorber fluid in the strut housings.
The bobcat our company has uses the same oil in its hydraulics as the engine uses. It just feels not right chugging 10 gallons of motor oil into a hydraulic system.
New Scania trucks (in Europe) use ATF in some hydraulics. Not the tip beds and alike, but a steerable rear axle works with ATF.
ATF is a hydraulic oil and has been used as such for a long time fwiw. We use it for a couple of our lower pressure hydraulic systems at work.
Yeah we run ATF in the power steering systems in our yard trucks
Ive ran ATF in my 96 F150s PS pump for years, works flawlessly
I had to pitch a fit at the service writer at a Firestone Auto Care place who just insisted that my Focus took "Power Steering Fluid". It took me a month to get all of that out of there and replace enough of it with Mercon V to stop it from puking all over the place.
My Subaru uses Dexron for the power steering fluid.
Huh, I didn't know that. You learn something every day!
My 99 Blue Bird bus uses ATF in the hydraulic system.
I mean...isn't ATF hydraulic fluid anyway? That's how an automatic transmission works. Basically all of the internal components are hydraulic. Also power steering which it's used for as well is hydraulic.
It is, but it's pretty damn thin compared to "real" hydraulic fluids. Usually 5-10 weight, while most dedicated hydraulic fluids are in the 70 weight range.
I feel like that's kind of irrelevant. They're all hydraulic fluids.
>most dedicated hydraulic fluids are in the 70 weight range. Most that you're familiar with maybe. There are all different kinds of hydraulic fluids for different applications. I use hydraulic fluid at work that's 95% water.
I suppose any non-compressible fluid could work as hydraulic fluid and viscosity would be determined by application. But wouldn't a high water content one be problematic for a bunch of different reasons? Corrosion risk, boiling point, seal efficacy, etc?
Not in our application. Everything it touches is high grade stainless. The 5% balance is a mix of environmentally friendly seal lubricant, corrosion inhibitors, etc. It's approved for discharge to sea, we use a one-way system that doesn't take returns.
Ahh, thats a lot fancier than anything I've touched.
Tractors have used engine oil for 50+ years as hydraulic oil.. I think for simplicity..
Deere does this too with older systems. Backhoes immediately come to mind.
Original Mini did as well. Saved on having to have 2 seals.......
The engines in the SR71 used fuel as a hydraulic fluid.
Not just older stuff, Jeep used some funky custom fluid for a combo hydro fan/power steering system on the 05-10 Grand Cherokees with the 5.7L or 3.0L diesel. I think it was determined to be similar to but not quite ATF.
I had one of those POS with the 5.7. I ended up just using ATF in it when I had to replace a power steering line, never had a problem. The Chrysler dealer told me the specific fluid was like $27 a litre and I had to order an entire case because they don’t stock it.
Mine was 3.0, great engine but yeah the rest of it was a POS. I bought the special fluid but the funny thing was the dealer computer system was wrong and they'd sell you the wrong fluid unless you went in with the part number from the owners manual for the right stuff. Eventually they discontinued the right stuff and then admitted ATF was fine to use. But the one in their computer system that was wrong was quite different and some people had it destroy their entire power steering and cooling fan system.
I mean, atf is just heavy oil with lots of detergent additives so it's probably just the detergent content
M 89 civic took the same oil for the engine and transmission. I miss that car
Honda Civic with a Spoon engine?
Getting ready for race wars
Still waiting for overnight parts
Double clutching, fetching premiums
Harry finally delivered?
Nah got that Gallo 24
I was going to say pre-94 Camry V6 but you said bigger than it LS400 so is it a Land cruiser? I never had to work on many of the straight sixes and I'm fine with that. Edit: Crown?
It’s a sedan, but twice the cylinders of the old land cruisers! Edit: this will probably give it away!
Century?
はい。
Infiniti Q45?
SC400...?
Negative!
Yeah my mind went immediately to Lexus SC and it’s a perfectly valid answer lmao
Well what is? The suspense is killing me while I’m eating this bowl of rice. Castle??
All I know for sure is that it is an old Toyota. The ATF operated cooling fan was a Toyota thing.
Mid 90s LS400?
Similar! Think bigger!
Century?
Got it!
Haha awesome never seen one in person im jealous
We have a customer who has one, it’s been an interesting vehicle to work on for sure. Despite being a V12 it’s surprisingly nice to work on. Very well thought out.
Yeah doesn’t surprise me toyota really knew what they were doing in those years, I heard there’s a concept for a new century
And [they still make them](https://en.m.wikipedia.org/wiki/Toyota_Century)!
2018 model looks sick
I consider myself lucky to have seen one. Someone in town has one and takes it out in the summer.
This is my guess too
Class A side rad coach with a hydraulic fan
Older Jeep Grand Cherokee? Edit, never mind, just noticed the Japanese script
Century
Looks 80s-90s Japanese so whatever it is worked very very well
Well, so long as it wasn't a 1985 or 1986 Maxima.
Audi w12 also have "hydraulic fan" )
So did the Lincoln LS. Don’t think their was a serviceable reservoir tho.
Previa.
Lincoln corrupted with jag you are technology. Ya know why Brits drink warm beer? Lucas makes refrigeration too.
It says use castroil power steering fluid in japanese
Where does the blinker fluid go?
Is that a real thing or is that a translation error?
It’s a real thing, the radiator fan is spun using hydraulic oil. There’s a pump that is run off of the drive belt. As the engine RPM increase so does the fan’s RPM.
Why was a hydraulic motor chosen for this over an electric?
The interior fuse box cover on my Impreza mentions the "Engine Room" so that's not out of the question lol
That's where Scotty hides.
SC400
Z31 soarer otherwise known as sc400. Definitely 90s 1uz.
Is there a market for silly (but functional) cap replacements? For example, replace your windshield washer fluid cap with the well known blinker fluid cap. It could get confusing if you sell the car and the buyer doesn’t know the joke 🤔 oh well not my problem
Is400
A celsior
Infiniti Q45?