Pretty easy to fix! There may be more than one problem, but solvable. The reservoir was originally designed with limited capacity for one way cylinders that had limited volume. The system needs a larger total reservoir to work well. I think there is a drain on the reservoir this should have a 4 way cross fitting and nipples put into it to allow the return to go only to the bottom of the res, while allowing draining as needed. A secondary reservoir can be placed at the same level as the original, and connected to the original reservoir with that cross fitting. The secondary reservoir should also have a vent, to allow it to flow, it will fill by putting fluid in the original vent filler cap. Remove the return line from the original filler pipe, its location causes the returning oil to foam as it hits the level of the oil in the res and mixes with air in the neck. It should return into the drain as above. If yours does not have a drain, putting one in is a matter of drilling a hole about 5/8" above the inside floor to drain the reservoir, then drilling and tapping that hole for 1/2" pipe thread. clean out all chips by flushing the tank and wiping and using a magnet to retrieve chips. Good luck and perseverance are needed. Jim
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