N73087 wrote:While you have the gen off, be sure to replace the tach seal, and the gen seal. Also replace the gen drive rubbers to start the 500 hour clock on the AD.
By changing two seals and the gasket, you will stay awake at night wondering which one fixed the problem.
Which AD were you speaking of?
01 January 1949 49-50-01
Subject: TCM ENGINE - GENERATOR DRIVE COULPLING RUBBER DISC
CONTINENTAL: Applies to All Continental C-75, C-85, C-90, C-125 and
C-145 Engines Equipped With Generators, Except Those Engines Listed
Below. (A-65 Series Engines Are No Longer Subjected to Compliance
With This Note.)
To be accomplished prior to May 2, 1949, and upon each 100 hours of
operation after inspection has been accomplished, or at major
overhaul, as indicated.
To preclude possible engine failure as a result of disintegration of
the generator drive coupling rubber disc, inspect and/or replace the
disc as follows:
I. Old Type - Without Metal Retainer Cup.
(1) Inspect rubber disc, P/N 22348 prior to May 2, 1949, and at
100-hour intervals after this inspection, and replace if
deterioration or cracks are noted. Special attention should
be given corners of slot to detect beginning of cracks or
tears.
(2) Above periodic inspection may be discontinued by installing
the improved type of coupling incorporating metal retainer
cup P/N 352030.
II.
Improved Type - With Metal Retainer Cup.
(1) Rubber disc P/N 25120 must be replaced at major overhaul.
NOTE: Engines with the following serial numbers are excluded from
the inspection requirements of this directive. However, if
rubber disc P/N 25120 is incorporated, it must be replaced at
major overhaul.
C-75: Serial No. 5257-7-12 and all higher numbers.
C-85: Serial No. 30568-8-12 and all higher numbers.
C-90: Serial No. 41132-8-12 and all higher numbers and
including Nos. 41122 and 41124 through 41127.
C-125: Serial No. 8108-8-2 and all higher numbers.
C-145: Serial No. 3470-8-2 and all higher numbers.
All "C" model engines reworked at Continental Motors Corp.
since September 1, 1948.
(Description of generator drive couplings is contained in
Continental Motors Corp. Service Bulletin Number M49-4.)
This supersedes AD 49-47-1.