... Every 4 seconds my hydraulic pump runs for about 1/4 of a second.

I think that we may have found the problem. We changed the high and low pressure switches. At this time, it looks like the high pressure switch is adjusted to low. I will have the pressure gauges plumbed in by Monday, to be able to tell for sure and test fly the plane again.

Today, after changing the hydraulic switches, we put the gear up and it ran every 4 seconds. I turned the master off and noticed that the gear doors were half down. We then lowered the gear and raised it. The gear started to come up then stopped along with the pump. After 4 seconds, the pump ran for 1 second and the gear came up another little bit more. This cycle continued for about 1 minute at which time the gear was all of the way up and the pump never ran again. I always thought that it had something to do with the switches. I have 745 hours on the plane. I bet that the old switch just got out of adjustment and the new one was set to low at the factory.

I will put up another post on Monday with what I hope are the final results.

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Lorn H. 'Feathers' Olsen, MAA, DynaComm, Corp.
248-478-4301, mailto:lorn@dynacomm.ws
LNC2, O-320-D1F, N31161, Y47, SE Michigan