Suzuki DF 90 Service Manual page 380

PINION GEAR BACK-UP SHIM ADJUSTMENT
(1) Position the shimming gauge A horizontally in a vise and
tighten vise securely.
09951-09010: Shimming gauge
(2) Assemble the bearing outer race 1, back-up shim 2 and
driveshaft oil seal housing 3 to the driveshaft.
NOTE:
Use a thinner pinion back-up shim 2 than the standard shim
so that a clearance B exists.
(3) Insert the driveshaft through the shimming gauge A open-
ing and then install pinion gear 4 and nut 5 to the
driveshaft, tighten pinion nut.
Pinion nut: 120 N . m (12.0 kg-m, 87.0 lb-ft)
(4) Install oil seal housing to shimming gauge with bolts 6.
(5) Depress and hold driveshaft so that driveshaft bearing is
firmly seated in bearing outer race.
(6) Hold driveshaft against oil seal housing 3 while measur-
ing clearance B between gauge and flat edge of pinion
gear 4 with thickness gauge, measured clearance plus shim
2 is the total shim thickness to be used in gear housing
reassembly for correct pinion gear position.
DF140 "K2" ('02) MODEL 11-87