337G Hydraulic Power Pack solenoid problem

[steven coelho]

Hi everyone!

I´m from Portugal.
Hope someone could help me. I´ve been trouble shooting a 337G landing gear. Works fine except for both solenoids getting so hot to a point that the pilot touched them and got second degree burn. They are the old sealed ones.

Electrically speaking the gear solenoid is always energised except when landing gear selector is down or when on ground (squat switch), the door solenoid is supplied all the time.

Changing solenoids will solve my problem?

I also read a post that cleaning the solenoids (new type) solved this problem


Thanks
Steven

[Red Air Rambo]

Hi Steven, there is a Service Bulletin on the solenoids, I would replace them. You might want to talk to Rick Cox at Cox aeroparts in Wichita, Ks.

Best of Luck,
Brent

[Red Air Rambo]

Originally Posted by Red Air Rambo

Hi Steven, there is a Service Bulletin on the solenoids, I would replace them. You might want to talk to Rick Cox at Cox aeroparts in Wichita, Ks.

Best of Luck,
Brent

Cox Air Parts 316-945-0737

[Guy Paris]

Hi All,

Please share the Service Bulletin number for said solenoids for hydraulic Power Pacs.

Thanks, Guy Paris

[Red Air Rambo]

I'll check if I still have a copy of it, but this is Cessna's reply on the Skymaster website:
"Cessna does not and it does not allow others to post its service letters and
bulletins on websites. Cessna has a full range of copyrighted service
publications available for owners, including subscriptions to Service
letters and bulletins. Cessna directly distributes such publications to
ensure that accurate, correct, and complete service information is provided
to individual owners for their specific aircraft. If you would like more
information about Cessna copyrighted service publications, please contact
Cessna Customer Services, Telephone No. 316/517-5800 or Facsimile No.
316/942-9006."

[Guy Paris]

Do you recall what year the service bulletin on the power pack came out?
thanks, Guy Paris....

[steven coelho]

Originally Posted by Red Air Rambo

Cox Air Parts 316-945-0737

Thanks Brent for your help.
Still having problems with the over heating solenoids.
I´ll call him up.


Thanks once again
Steven