Non-Overhaul Removal and Replacement
Teledyne Continental Motors, Inc.
TM
10-40
IOF-240 Series Engine Maintenance Manual
29 November 2006
CAUTION: Do not scratch, mar, or damage the crankshaft or
crankcase while removing the crankshaft nose oil seal.
6.
Remove the screws (Figure 10-22) from the crankcase nose oil seal retainer plate on
the front of the crankcase.
Figure 10-22.
Retainer Plate and Screws on Front of Crankcase
7.
Remove the crankshaft nose oil seal, (made up of two components, a seal and spring,
shown in Figure 10-23). The seal was installed using Gasket Maker, gentle force may
be required to extract the seal from the counterbore.
8.
Clean the Gasket Maker residue out of the counterbore recess using a chlorinated
solvent such as Loctite Chisel
®
or methylene chloride
followed by a naptha solvent
such as Loctite ODC-Free Cleaner and Degreaser. Remove all residue and debris
from the bore.
9.
Refer to the “Crankshaft Overhaul” section in Chapter 9 of the Overhaul Manual
(OH-22) for instructions on restoring the tin plating and helix pattern on the
crankshaft at the crankshaft nose oil seal area.
10-7.2. Crankshaft Nose Oil Seal Installation
WARNING
If engine electrical power is not disconnected, a faulty ignition
circuit could allow the engine to start and the propeller to
rotate. Do not stand or place equipment within the arc of the
propeller.
Procedure
1.
Clean the etched helix pattern on the crankshaft.
2.
Remove the spring from the crankshaft nose oil seal.
3.
Unhook the spring ends using an unwinding motion.
4.
Verify the seal spring length matches the dimension specified in Figure 10-23. If the
spring length is not within this tolerance, replace it.
