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Author Topic: Winter bar oil mix  (Read 11657 times)

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Offline Weekend_Sawyer

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Winter bar oil mix
« on: January 21, 2003, 08:20:35 AM »
 A friend of mine told me he cuts his bar oil in the winter with 5W-30 so it flows better. Do you guys have any thoughts on this?

When I was growing up dad would put used motor oil in the bar oil tank. Dad grew up in the depression and tried to get the last bit out of everything. Taught me some great values but Don't drink his coffee!
Imagine, Me a Tree Farmer.
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Offline Tagerts_crossing

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Re: Winter bar oil mix
« Reply #1 on: January 21, 2003, 11:23:08 AM »
  I have thined with hyd oil in the past.  Once the saw gets warm you dont need to thin it as much if at all.  Some may say it wont stick and not to do it but if you can't pump it, it wont stick either.  Use the used motor oil if you want but as with any oil be sure it is clean.  Also the old timers used alot of gear reduction saws so the chain was not moving as fast as new saws do, so the need for sticky oil was minimal.  

 John
John Schoolcraft

Offline Rob

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Re: Winter bar oil mix
« Reply #2 on: January 21, 2003, 03:25:25 PM »
Sawyer,

  Why don't you just buy the winter grade oil to start with instead of cutting the regular grade bar oil it's easier...??If your gonna this it I would use Kerosene or #2 heating oil.

                     Later Rob..

Offline Minnesota_boy

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Re: Winter bar oil mix
« Reply #3 on: January 21, 2003, 05:22:07 PM »
I noticed today that my bar oil was a bit thick, but I think I have a better solution.  I'm going to take a couple of days off and let the weather warm up a bit.
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Offline Jeff

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Re: Winter bar oil mix
« Reply #4 on: January 21, 2003, 06:06:56 PM »
We keep our bar oil in a heated room. Use the same stuff all year. I don't think the saw cares, its getting it in the saw when its thick thats the Beech.
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Offline RMay

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Re: Winter bar oil mix
« Reply #5 on: January 21, 2003, 07:18:08 PM »
I did not know there was a winter grade bar oil . I have been cuting it with 5W-30 on the cold days which is not very often in Arkansas  ;D
RMay in Okolona Arkansas  Sawing since 2001 with a 2012 Wood-Miser LT40HDSD35-RA  with Command Control and Accuset .

Offline Larry

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Re: Winter bar oil mix
« Reply #6 on: January 22, 2003, 05:04:08 AM »
Husky sells the winter grade.  Same price as the regular stuff.
Larry
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Offline Weekend_Sawyer

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Re: Winter bar oil mix
« Reply #7 on: January 22, 2003, 08:53:12 AM »
 Just got off the phone with the shop I do business with. I asked him if he carried winter bar oil mix, He said no, just mix some disel in with it. He says that it is not cold enough for long enough periods of time to justify carrying it here in Maryland.

And that is good enough for me  8) 8)
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Offline Mark M

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Re: Winter bar oil mix
« Reply #8 on: January 22, 2003, 10:08:06 PM »
Iíve used #1 diesel fuel too when it's really cold. In the northern states thatís about Ė20F or colder. I didn't measured the amount, just added some to my summer bar oil and then shook it up until it sounded about the same as it does in the summer (probably no more than about 25%). Below Iíll explain why (in my opinion) itís not a good idea to dilute chain oil with 10wt hydraulic oil.

The viscosity of one summer bar oil I found is 143 cSt at 40C, this is somewhere between a 15W40 and SAE 50 oil and itís pretty thick For those of you who are not familiar with the SAE viscosity scale a 15W40 oil is about the same thickness as an SAE 90 gear lube. Different scales are used for Engines and Gear lubes. The engine oils (which include hydraulic and transmission oils) are SAE 60 and less. Gear lubes are greater that SAE 60, usually starting at SAE 75, which is about like a 10 wt hydraulic oil. ISO oils are about the same as the viscosity in cSt (centistokes) at 40C i.e. a ISO 68 oil is right around 68 cSt.

In our oil analysis lab we test viscosity and sometimes deal with fuel dilution and oil transfer problems from hydraulic systems to transmissions, engines, and final drives. I once did an experiment to see how much SAE 10 it took to affect the viscosity of 15W40 and found that you would have to add 6 parts 10 wt to 1 part 15W40 to lower it to a SAE 20 range.

Here are some sample viscosities of common oils. These happen to be Cat oil because I have access to the Cat product specs but most other brands of oils would have similar properties.

SAE 10 Hydraulic Oil: Pour Point -30C/-22F,  Viscosity 39cSt at 40C
SAE 30 Transmission Oil: Pour Point -15C/5F,  Viscosity 100cSt at 40C
SAE 15W40 Engine Oil: Pour Point -33C/-27F,  Viscosity 104cSt at 40C
SAE 50 Transmission Oil: Pour Point -12C/10F,  Viscosity 198cSt at 40C

I also found specs on a few Texaco/Chevron Chain Bar oils:

Texaco Summer Grade: Pour Point of -24C/-11F,  Viscosity 143 cSt at 40C.

Chevron Red ISO 68:  Pour Point of -30C/-22F,  Viscosity 65 cSt at 40C
  Recommended for less than 32F

Chevron Red ISO 100:  Pour Point of -27C/-17F,  Viscosity 95 cSt at 40C
 Recommended for 32F-60F

Chevron Red ISO 150:  Pour Point of -24C/-11F,  Viscosity 143 cSt at 40C
 Recommended for all seasons mild climates

Chevron Red ISO 220:  Pour Point of -21C/-6F,  Viscosity 209 cSt at 40C
 Recommended for summer use in high performance professional saws


Although I would have to do an experiment to get a accurate number (I havenít tested chain oils in our lab), I am guessing that you would need to add 10 or more parts SAE 10 to summer bar lube to get it below the 65 cSt of the lowest temperature Chevron bar oil. By the time you do this you have diluted the bar oil so much that it no longer behaves like a bar oil but instead a hydraulic oil, which has very different properties. This may or may not cause problems but I predict the wear rate would be greater.

My advice is to use either a winter bar oil or dilute with kerosene/diesel fuel. At least you will be diluting less to bring about the same viscosity change. Below are some approximate amounts of fuel need to bring about a change in 15W40 engine oil. Although I didnít do this experiment with bar oil I expect it would have similar results. Use your own good judgment.

Adding 10% diesel fuel to 15W40 lowers the viscosity to about SAE 30
Adding 15% diesel fuel to 15W40 lowers the viscosity to about SAE 20
Adding 20% diesel fuel to 15W40 lowers the viscosity to about SAE 10
Adding 25% diesel fuel to 15W40 lowers the viscosity to about SAE 5

Mark Mathys



Offline johnjbc

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Re: Winter bar oil mix
« Reply #9 on: January 23, 2003, 07:09:13 AM »
My Kubota with HST maintenance schedule call for changing the hydraulic fluid every couple hundred hours So I end up about 15 gal of fluid every time I change. This works great for cutting Bar Oil  :D ;D ;)
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Offline Mark M

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Re: Winter bar oil mix
« Reply #10 on: January 23, 2003, 08:10:46 AM »
John

Did you ever have that oil tested? We routinely run hydraulic oils over 4000 hours, some up around 10000. As long as it is clean and dry there is little degradation that takes place. In most cases the oil that gets drained is a lot cleaner than the new oil that goes in.

I don't know anything about Kubota HST though, so it may be very different. Is the transmission in the same oil?

Mark

Offline johnjbc

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Re: Winter bar oil mix
« Reply #11 on: January 23, 2003, 09:05:19 AM »
Mark
No I never had it tested. Its what is recommended in the manual.  Its all one system, the transmission, backhoe, and any implements you hook on the 3 point hitch.  Sense I sold my other tractor maybe I should hook up all my attachments and let the oil flush before  the next change.   ??? ??? Then I could try a longer interval. Guess itís a trade off between the cost of the oil and the cost of a transmission rebuild  ::) ::)
John
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Offline ADfields

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Re: Winter bar oil mix
« Reply #12 on: January 23, 2003, 05:31:22 PM »
John, you are right to change it like the book sead.   It's your transmission fulid in your cace and is a lubercant for big buck parts in your trans.   Also the heat made in your trans brakes it down so soon it's not as slick and has fine matter suspended in it that a filter cant get out.   In a plane hydraulic systom the stuff will last about forever but when a trans is in the mix it must be changed.   I would not bother with flushing out the impluments befor the change just keep the tractor cleen.
Andy

Offline Mark M

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Re: Winter bar oil mix
« Reply #13 on: January 23, 2003, 06:31:01 PM »
Hi John,

Andy is right about the heat being generated by the transmission leading to oil degrade faster than hydraulic alone. Most hydraulic systems only run about 140F so there isnít much oxidation or thermal degradation. The bigger concern is condensation because they donít get hot enough to cook off the water.

I have to disagree with Andy about flushing the implements though. We see a lot of contaminated systems on new farm tractors because someone hooks up a dirty implement. What I would do instead of circulating oil and maybe contaminating the tractor is hook up the pressure hose to the implement and then remove the fitting on the outlet hose and stick it in a bucket instead of hooking it back to the tractor. Cycle it a couple of times and then hook it up. Watch your oil level closely when you are doing this so you donít run too low.

FYI Ė I rebuilt, tested, and did trouble shooting on Cat transmission and hydraulic systems for over 11 years before I went back to school to study chemistry. If the oil is breaking down it usually has a bad (burnt) odor and will be dark brown. If it is clear and bright it is probably still good. Take a sample to your nearest Cat dealer and for about $12 they can test it for contamination and wear material. Make sure they do a particle count. If all looks good you may be able to save the cost of an oil change (but don't jepordize your warranty coverage though). We used to say ďoil is cheapĒ but not anymore. By the time you figure cost of materials, labor, disposal fees, loss of productivity, etc. etc. etc. it costs a lot of money. You donít want to change it until it is necessary. This is just good equipment management.

For more info on Oils, Fuel, Oil Analysis, Cooling Systems and Coolant Analysis visit: http://www.butler-machinery.com/oil.html

Good Luck

Mark M



Offline ADfields

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Re: Winter bar oil mix
« Reply #14 on: January 23, 2003, 11:46:10 PM »
Mark I agree with flushing into a contaner like you say for contaminated implements.   I just dont see the need if it's never been hooked to a bad or dirty systom and the implements are cleen.   If the tractor is cleen and you keep it cleen why remove cleen fluid from implements?   Now if something has failed and the fulid is contaminated in the implements it needs to get out.  

Also about testing.   The way I see it if the fulid tests bad you were behind the ball and need to play catch up.   By that I mean when you drain the fluid you dont get it all and in most caces onley around half is all you get.   So the half you dont get will mix with the new then the systom will test "out" a lot faster next time around so I dont see the payoff.   I did my tow trucks on a cycle and tested all the fluids every time for a number of years but it was not very hard to get way behind the ball this way.   It's hard to shut things down and get it changed when it needs to be changed ASAP, it was much beter for me to look at a calender and say we will service truck #x on Saterday the 10th.   In the end I found it just worked out beter to service as the book stated the service times should be.

Now back when I was on the farm we just keep dumping it in the top and change the filter if you think of it when we were in town at the parts house.  :o   With all the leaks we never fixed it all worked out about right. ::)   The good old days. 8)
Andy

Offline Bro. Noble

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Re: Winter bar oil mix
« Reply #15 on: January 24, 2003, 03:34:15 AM »
Andy,

That last part sounds like us.   In addition you lose a bunch everytime you connect and disconnect quick couplers------seems like it goes all over your shirt and pants >:(.  Probably a good idea to change shirt and pants on a regular rotation ;D

Noble
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Offline Don P

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Re: Winter bar oil mix
« Reply #16 on: January 24, 2003, 05:34:14 AM »
Don't forget the waterproof shoes :D.
I need to reread the technical stuff it just soared over the top the first time by. My tractor runs straight 80 wt mineral oil as trans and hydraulic...talk about slow to get up in this weather. I've used it as bar oil some, when I'm out..is it ok to just use it up for that? Would kill 2 birds.
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Offline Mark M

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Re: Winter bar oil mix
« Reply #17 on: January 24, 2003, 07:01:59 AM »
Hi Don

Are you sure it uses an 80 in the hydraulic? The gear oils generally have extreme pressure (EP) additives that might cause problems in a hydraulic system. A SAE 30 transmission/drive train oil might be a better choice, but you should use what the manual says. Hydraulic systems aren't too fussy and in Cat machines (probably most others too) you can use just about anything except gear oils. A 5W20 engine oil works really well.

As for the bar oil a 80 gear oil would probably work pretty well. It has EP additives that give protection is sliding wear situations. It's a little thinner than 30 wt engine oil so should hang on the bar pretty good at cooler temps. You might want to let it set for a while to settle out any solids and then carefully transfer to another container without disturbing sediment. Hydraulic oil doesn't have any EP additives and wouldn't be as good, but it will flow at a lower temp.

Mark

Offline Tagerts_crossing

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Re: Winter bar oil mix
« Reply #18 on: January 24, 2003, 01:14:48 PM »
  I have a cousin who was a designer for cat worldwide as well as some aerospace firms.  He was responsible for that joystick drive on the big cat crawlers.  He is one to try to talk over your head with mumbojumbo then give the disclamer Don't hold me to it.  To meet him he is very convinceing in his delivery,  but to Know him is another story his equipment and vechicles are much nicer and newer than most, but always in a state of disrepair and rebuild.  But always a tale of how it is not his fault(BAD DESIGN). I have learnd that you can always get good advice from the guy who has had to make do with what he had, and has been successful at it.  Just a thought John  


 I bet the worms are going to crawl out of the can now.  HA!
John Schoolcraft

Offline Bro. Noble

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Re: Winter bar oil mix
« Reply #19 on: January 24, 2003, 01:56:06 PM »
John,

Boy I wouldn't have had the guts to call Rick and Perry worms! :D :D  :D  When did your cousin work there?  Good chance my Dad worked with him.

Noble
milking and logging and sawing and milking


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