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#1
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I overhaul it by removing the aft end. It unscrews like a jar top. Then Jack it to pull the piston out.
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#2
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Finally found the leak(s) ! ! !
Turns out it was the up-lock actuator - the last place I looked, all the way in the back under the rear seat rail. I can't believe that it made the mess that it did, that said there's no doubt it's the source. Has anyone compiled a list of O-rings and packing required to overall ALL of the gear actuators ? So The plan is to overhaul all of the main gear actuator except the big main actuator that's dry as a bone. Thanks! |
#3
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We just went to the parts manual and looked at them up and ordered them Do you have the parts manual book if not sent me a private message with your email address and i will sent it to you or if you are on any of the Facebook skymaster sites i have downloaded them there under files
Frank
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1967 337B Flying in Skymasters since I was 16 |
#4
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I have the "Cessna 337 Series Parts Catalog - 1965 - 1969" .
In Fig 46 is shows the main gear door strut actuator but no break-out for the internal seals. The up-lock and maingear doors are detailed in Figs 122 and 122A That said , I looked up the MS2774 & 5 o-rings - not found. Further the "S1121-389 CESSNA AIRCRAFT PARTS & ACCESSORIES RING, BACK UP TEFLON" listing @ $129 !!! Surely someone has complied a shopping list using generic PN s? |
#5
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You should look up MS28774 and MS28775 orings and I think the backup Teflon rings should have the same dash number. The -329 is huge
I think I still have a book and will check in the morning |
#6
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It’s good that you caught that. If the fluid drained out the gear would not unlock. The spring locks the gear up. And only hydraulic pressure will release it.
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#7
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Yikes, that's not a good "fail" mode ....
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