From: "Jeff Whaley jwhaley@datacast.com" <flyrotary@lancaironline.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: RD-1C Oil Leak and Ring Gear Retainer O-Ring
Thread-Topic: RD-1C Oil Leak and Ring Gear Retainer O-Ring
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Date: Tue, 22 Jul 2025 11:31:57 +0000
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I have an oil leak at my RD-1C redrive.
Took the drive off and noticed the large O-Ring was bulged out in one area =
between two mounting bolts.
The RD-1C Manual/Parts List specs the O-Ring as 5.125" O.D. x .190" thick.
Has anyone ever replaced this before and/or have a known source of where to=
 obtain?
Thanks for any feedback.
Jeff Whaley