Final Drive / Propulsion
5.17
Drive Shaft Inspection
1. Clean driveshaft and support in V - blocks as shown
(C). Measure runout by rotating shaft and
observing dial indicator at point (B). Replace if
runout exceeds the service limit.
NOTE: Excessive driveshaft runout can cause vibra-
tion, bearing, and spline failure. See Pump/Final Drive
T roubleshooting at the end of chapter 2.
2. Inspect driveshaft splines and splines inside engine
drive coupler and impeller carefully for wear or
damage. Replace worn parts. Rubber bumpers
control driveshaft end play. Replace if worn,
cracked or damaged.
NOTE: If drive shaft, impeller , or coupler splines are
worn or damaged, improper pump-to-hull, or pump-to-
engine alignment should be suspected. Refer to Pump/
Drive shaft Alignment on pages 5.12 -- 5.14 for more in-
form a ti o n .
Stator Disassem bly
1. Remove tail cone screws (3) and tail cone. Inspect
O--ring seal located behind tail cone. Replace seal if
damage is evident.
NOTE:
When removing tail cone, hold stator with cone pointed
down. Twist cone off. This will allow any water from enter-
ing the impeller assembly. It is normal for a small amount
of water to be inside the cone during operation.
C
B
C
Place dial indicator
at (B)
Support in V-blocks
at (C)
Drive Shaft Runout
Service Limit: .005² (.13mm)
Drive Shaft End Play
.100-.200² (2.54-5.08mm)
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