emergency hand pump opertions

[cessnadriver]

Tracy. It looks like you have a newer C337 and that it probably has a electric/hydraulic system where mine is engine driven hydraulic pump. Anyway the systems are set-up so any time you loose electric power the solenoid is in the position to allow you to hand pump the gear down. That's why you cannot pump the gear doors closed WITHOUT the master switch, the solenoid in the system is thinking there is no electrical power and wants to put the gear down. I hope this explanation helps. Believe me I've gone through this during my annual and now understand the system much better.
Regards, BILLS

[Learjetter]

Hi guys- just FYI in case you're similarly afflicted.

I got tired of watching helplessly as screws and washers and who-knows-what went disappearing down under the emergency hydraulic hand pump with it's nearly shredded-to-pieces rubber gasket skirt (P/N 1280119-1, 1977 NA G model).

I went to the local fabric store and got some rubberized fire-and chemical- resistant leather-type fabric and fabricated a new skirt under "owner-produced" guidance in AC 20-62E and installed it with pilot-signed logbook entry as preventive maintenance under 14 CFR 43 Appendix A.

The skirt itself is just a wedge-shaped piece with two pieces of elastic sewn in--one inside the opening collar under rolled-over hem, and the other on the "top" of the skirt to allow stretching w/o bunching. It's held in place with a sandwich of felt gasket material cut to oval shapes.

Total cost? about $14 in 1 yard of fabric & some gasket material and 3 hours fabricating time.

Inflight Ops Check -- good.

[mshac]

Nice job LearJetter, but I'm not surprised you didn't want to buy Cessna's $388 replacement rubber boot! I looked on Summitracing.com, and they have 100's of rubber shift boots to choose from, mostly from $15-$30 each. I bet you could find one there that would fit.

[wslade2]

I thought I read somewhere in the forum about McFarlane making these?

[edasmus]

True, I purchased one from them earlier this year. Paid too much but it was quick and easy. Ithink it was about $110 ish or so.