279
GEARCASE
DRIVESHAFT SHIMMING
12
DRIVESHAFT SHIMMING
IMPORTANT:
If new pinion gear is needed,
replace gear set before shimming.
Pinion gear backlash is achieved by using shims
between the driveshaft bearing housing and the
thrust washer. When installing a new thrust bear-
ing or washer, bearing housing, pinion, or drive-
shaft, it is necessary to properly shim the
assembly to restore factory clearance.
Use Driveshaft Shimming Tool, P/N 393185.
Shim gauge bars are precision made and should
be handled carefully. The length of each bar is
stamped near the part number. This dimension is
0.020 in. (0.508 mm) shorter than the actual
shimmed length of the driveshaft.
IMPORTANT:
Degrease pinion and driveshaft
tapers prior to assembly. Check tapers for any
damage or material transfer. Replace any dam-
aged components before proceeding.
Assemble the driveshaft bearing housing, thrust
washer, thrust bearing, and pinion onto the drive-
shaft. Use Driveshaft Seal Protector, P/N 318674,
whenever installing or removing the bearing hous-
ing. Lightly coat the threads of the pinion nut with
outboard lubricant and torque to 100 to 110 ft. lbs.
(136 to 149 N·m).
IMPORTANT:
The original pinion nut may be
used for shimming, but must
NOT
be used in final
assembly.
Select Collar, P/N 341440, and Shim Gauge Bar,
P/N 328367.
Slide the collar onto the driveshaft with large end
in contact with the bearing housing.
Insert the assembled driveshaft into the tool base
and tighten preload screw against the driveshaft
until groove on the spring-loaded plunger is flush
with end of threads. Tighten locking ring on pre-
load screw.
Rotate the driveshaft several revolutions to seat
bearings.
Lay the tool base on its side. Position the shim
gauge bar against guide pins of the tool base.
Check the squareness of the bearing housing
mounting surface by holding the shim gauge bar
against the pinion while rotating
just the bearing
housing
and measuring the clearance between
the gauge bar and the bearing housing with feeler
1.
Driveshaft bearing housing
2.
Thrust washer
3.
Thrust bearing
4.
Pinion
COA3565
2
4
1
3
1.
Collar
2.
Tool base
3.
Groove
COA3566
DSC00326
1.
Shim gauge bar
COA3567
1
3
2
1
Summary of Contents for E-tec 75 HP
Page 1: ......
Page 233: ...233 POWERHEAD POWERHEAD VIEWS 10 POWERHEAD VIEWS Port Short Block Starboard Short Block ...
Page 234: ...234 POWERHEAD POWERHEAD VIEWS Port Dressed Powerhead Starboard Dressed Powerhead ...
Page 235: ...235 POWERHEAD POWERHEAD VIEWS 10 Front ...
Page 236: ...236 POWERHEAD POWERHEAD VIEWS Rear ...
Page 237: ...237 POWERHEAD POWERHEAD VIEWS 10 Top ...
Page 298: ...S 2 ...
Page 344: ......