bmw2002
starting to shine!
Member since April 2017
Posts: 34 
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Post by bmw2002 on Oct 12, 2017 19:20:40 GMT -5
Are there any generally accepted thoughts about the reasons or frequency of changing out the oil in your rock saw reservoir? I had to get out of Cave Creek, AZ in mid May and stayed in the NW to do some noodling, etc. Got back last week. I left the oil in my reservoir (garage) during this time. I looked at it and it appears to be fine, but I wanted opinions from the forum about what prompts you to change out your oil completely. Is it just build up of gunk, or is there a life span of mineral oil (with Covington additive for upper MOH's)? Thank you as always. I have never heard of mineral oil having a life span, but who knows?
Mike
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Fossilman
Cave Dweller 
Member since January 2009
Posts: 20,718
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Post by Fossilman on Oct 13, 2017 9:05:47 GMT -5
Go ahead and cut away!!! I only change mine when it turns to gunk!! Mineral oil doesn't go bad....Some people cut more than others,so they change their oil more often..
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Mark K
Cave Dweller
Member since April 2012
Posts: 2,816
Member is Online
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Post by Mark K on Oct 13, 2017 11:53:58 GMT -5
When you do, drain it into a bucket with a lid and put it away where it will be left unmolested for a few months. If you can secure the bucket at an angle, the crud will fall down to the edge and be easier to pour into another container when it is settled out. Then when you get as much out as you feel is prudent, put it back until you clean out again. Then repeat.
One word of caution. DO NOT store oil in a milk jug. It will turn brittle and you will be displeased. If it breaks where it is the wife's inconvenience, you may be dead.
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bmw2002
starting to shine!
Member since April 2017
Posts: 34
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Post by bmw2002 on Oct 13, 2017 13:06:37 GMT -5
Thanks to everyone. I tried scanning the equip. thread, but anyway. I appreciate your help
Mike
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AzRockGeek
has rocks in the head
Member since September 2016
Posts: 703
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Post by AzRockGeek on Oct 14, 2017 20:51:59 GMT -5
Last spring I bought a 24" saw that had the oil stored in it for over 20 years. I drained it to move it, when I got it home i used a putty knife to scrape all the settled crud and and re-installed the oil. Cutting like new.
Your neighbor in the SE valley.
Tim
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QuailRiver
fully equipped rock polisher
Member since May 2008
Posts: 1,640
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Post by QuailRiver on Oct 15, 2017 8:17:51 GMT -5
I generally change mine when I first notice that it starts clinging rock sludge particles on the powerfeed tracks and rod. When the oil is dirty enough that rock particles are staying suspended in it then it's working against you instead of for you. Those particles are abrasive and will cause wear on any areas inside the saw where there is friction taking place.
Larry C.
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