LOWER UNIT 9-27
CHECKING DRIVESHAFT THRUST PLAY
After obtaining optimum tooth contact, driveshaft thrust play
should be measured.
1. Affix gear adjusting gauge to driveshaft.
\ 09951-09530 : Gear adjusting gauge
2. Slowly push driveshaft downward and read maximum play.
Designate this amount of play as (A).
Driveshaft thrust play :
Approx. 0.4 – 0.6 mm (0.016 – 0.023 in.)
NOTE:
Driveshaft thrust play (A) should be known to adjust reverse
gear shim.
RECHECKING DRIVESHAFT THRUST PLAY
(Reverse gear back-up shim adjustment)
1. After adjusting forward gear tooth contact pattern, correctly
assemble propeller shaft, housing assembly, reverse gear
and related components (See page 9-17 to 9-18).
2. Install sliding hammer A and remover B onto propeller shaft
and strike a few gentle outward taps.
\ 09930-30161 : Propeller shaft remover –
BB
BB
B
09930-30104 : Sliding hammer –
AA
AA
A
3. Affix gear adjusting gauge to driveshaft.
\ 09951-09530 : Gear adjusting gauge
4. Slowly push driveshaft downward and read maximum play.
Designate this measurement as play (B).
5. Compare play (
B
) to play (A) (page 9-27).
6. Reverse gear back-up shim adjustment is correct if (B) is
equal to (A).
If (B) is less than (A), reduce reverse gear back-up shim thick-
ness.
\
A
B
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