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Thread: Flight Box Fule Pumps ???Problems /Fix???
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Old 07-05-2010 | 10:03 AM
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w8ye
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From: Shelby, OH
Default RE: Flight Box Fule Pumps ???Problems /Fix???
The Hobbico pumps are gear pumps. The back side has a brass disc against the gears. There is a big rubber ring that rides against this brass disc to hold pressure against the gears to seal them. If you loosen the three screws on the back of the pump just a smidgen, the gears will turn freely.
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