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Message: <blockquote data-quote="OldMachinist" data-source="post: 41233" data-attributes="member: 437"><p>You need to drive it around at half throttle while raising, lowering and tilting the bucket for about 15 mins. to work the air out of the system. Don't run the cylinders to the stops as it will cause more cavitation with air in the system. Let it sit overnight, check the fluid level and repeat the next day, most of the air should be out. If after doing that the oil still foams I'd be looking for a suction leak. Sometimes a leak on the suction side won't drip much oil so you may not notice a puddle. Wipe everything down around the suction line from the tank to the pump and look for small overnight drips.</p></blockquote><p></p>