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>the hydraulic pump cycles On and Off intermittently<

Bob, it  sounds like you have an internal leak in one of your gear or gear
door cylinders.  An internal leak is the result of hydraulic fluid leaking
around the cylinder piston resulting in a reduction of system pressure and
the cycling of the pump.  On the big metal this is detected by heat build
up on the bad cylinder, but for our craft, isolating each cylinder one at a
time until the problem goes away is the only way that seems to work.  There
is no external signs of internal leaks.

If it's not a cylinder problem, isolate the dump valve.  If not the dump
valve then  the last component left is an internal leak in the hydraulic
pump itself.

When you isolate the problem we would appreciate a service difficulty
report (SDR).  Thanks.

Jim Frantz
Lancair Network News  
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