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Old 04-04-2009, 12:08 AM
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pfisdon pfisdon is offline
LawnSite Member
Join Date: Jan 2000
Location: Kentucky
Posts: 34
The oil in a hydro unit is a closed environment , it does not suck in air and dust like the engine does. Unless you are putting your pumps to extreme conditions like steep hills , high temperatures or general hard abuse ,the hydro oil does not need to be changed as often. Unless you just like to waste good oil and money for no reason.
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