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I would use a Universal Tractor Fluid (UTF). It should cover all the bases except any compartment that has wet brakes or clutch packs. In those I would use an approved fluid that has LS (limited slip) additive packages. Years ago, I managed a good sized fleet of primarily Cat, Deere and Mack equipment. Of course, every manufacturer had a different hydraulic oil recommendation and it was driving us crazy trying to keep it all straight. After much research, we opted on UTF for over 90% of our hydraulic applications. It was a good test case since we were on a Scheduled Oil Analysis program and could montitor our results. We found that we were able to dramatically extend our drain intervals with UTF, with no adverse results. We had shovels with over 20,000 hours still running with the original pumps and the lab reports were still coming back clean. UTF is a little more money, but when you figure in the aggravation factor of stocking many different oils, it is well worth the extra cost. Scott
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