Mercury BRAVO Service Manual page 209

SERVICE MANUAL NUMBER 28
16. If preload is incorrect, adjust by adding or subtracting shims from upper tapered roller
17. Check pinion height.
90-863160 MAY 2000
bearing cup. Reinstall clamp plate and recheck preload [3-5 lb-in. (0.3-0.6 Nm)]. Record
final preload.
a. Rotate drive shaft several times to seat bearings. Insert shimming tool (91-42840)
into gear housing.
b. Measure clearance between tool and pinion gear with feeler gauge and shimming
tool. Clearance must be .025 in. (.635 mm). Take measurement at 3 locations on
pinion gear (120° apart).
a - Shimming Tool
b - Feeler Gauge
c. If clearance is less than specified: Add appropriate thickness of shim(s) under lower
tapered roller bearing cup.
Any thickness added here Must be subtracted from shim thickness at upper
bearing.
If clearance is more than specified: Remove appropriate thickness of shim(s) from
under lower tapered roller bearing cup.
Any thickness subtracted here Must be added to shim thickness at upper
bearing.
a - Shims, Lower
b - Bearing Cup, Lower
c - Shims, Upper
d - Spacer
e - O-Ring
d. Recheck clearance after changing shim(s) in Step b.
b
a
e
d
c
b
a
BRAVO ONE GEAR HOUSING
76878
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Page 3B-37