Johnson J2R4SUC 2007, Руководство по обслуживанию

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137
GEARCASE
GEAR SHIMMING AND ADJUSTMENT
8
A shim adjustment may be necessary in order to
obtain the optimum tooth contact pattern.
IMPORTANT:
The backlash of the gear should
be checked when increasing or decreasing the
thickness of the shim to adjust tooth contact.
Example
Correction measures:
•
Decrease the thickness of the forward gear
shim.
•
Slightly increase the pinion gear shim thickness.
IMPORTANT:
Do not set tooth contact in the
top side toe contact position. Damage and chip-
ping of the forward and pinion gear may result.
Example
Correction measures:
•
Increase the thickness of the forward gear shim.
•
Slightly decrease the pinion gear shim thick-
ness.
IMPORTANT:
Do not set tooth contact in the
bottom side toe contact position. Chipping of the
pinion gear may result.
Propeller Shaft Thrust Play
After adjusting all gear positions, measure the
propeller shaft thrust play.
Propeller shaft thrust play:
•
0.008 to 0.016 in. (0.20 to 0.40 mm)
Measurement
Push the propeller shaft inward.
Hold the propeller shaft in and set the dial gauge
pointer to zero.
Slowly pull the propeller shaft outward and read
the maximum thrust play on the dial.
If the measurement is more than the specification,
increase the propeller shaft thrust washer thick-
ness.
If the measurement is less than the specification,
reduce the propeller shaft thrust washer thick-
ness.
Optimum Tooth Contact 006275
INCORRECT Top Side Toe Contact 006276
INCORRECT Bottom Side Toe Contact
HEEL
Convex side
Approx. 1/3 of
tooth width
Approx.
1 mm
TOE
Toe
Heel
Heel
Toe
006278