Mercury 90-863160 - Page 209

BRAVO ONE GEAR HOUSING
SERVICE MANUAL NUMBER 28
90-863160 MAY 2000 Page 3B-37
16. If preload is incorrect, adjust by adding or subtracting shims from upper tapered roller
bearing cup. Reinstall clamp plate and recheck preload [3-5 lb-in. (0.3-0.6 Nm)]. Record
final preload.
17. Check pinion height.
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
b
76878
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.
22262
a
b
c
d
e
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.