Cub Cadet 8404 - Manual (Page 161)

TRANSMISSION
4-57 D615-W02 May-2003
615W4A9A
e. Backlash Adjustment Method
• Determine entire amount of shim (3), (4) with pre-
load of left and right taper roller bearing in differen-
tial gear assembly. Divide left and right properly by
determined entire amount of shim. If backlash less
than the specified, move shim of spiral bevel gear
to differential locking shift (5). If backlash exceeds
the specified, move shim of differential locking shift
to bevel gear properly.
Sect. Specified
Rotation torque of
spiral bevel gear 3.92 ~ 6.37 N·m
0.4 ~ 0.65 kgf·m
2.89 ~ 4.70 lbf·ft
Sect. Specified
Backlash between
spiral bevel gear and
bevel pinion shaft 0.15 ~ 0.30 mm
0.006 ~ 0.012 in.
2. Make sure backlash and tooth contacted between
spiral bevel gear (1) and bevel pinion shaft (2).
(1) Spiral Bevel Gear
(2) Bevel Pinion Shaft
(3) Shim
(4) Shim
(5) Differential Locking Shift
(6) Bearing Case
(7) Shim
• W h e n a d j u s t i n g b a c k l a s h , e n t i r e
amount of shim should be kept.
CAUTION
f. Tooth Contact Checking Method
• Apply a few tooth surface with thin film of red lead at
3 positions where divided into 3 circumference, ap-
ply bevel gear properly with load, rotate bevel pin-
ion shaft, and then ensure tooth contacted.
615W4A8A
1. When assembling differential gear assembly into
transmission case, adjust pre-load of taper roller
bearing (1), (2).
a. Adjustment Method
• Insert datum shim (0.75 mm) in left and right bear-
ing case (3), (4) and check bearing pre-load with
rotation torque of spiral bevel gear (5). If rotation
torque exceeds the specified, increase the amount
of shim and if less than the specified, decrease it.
b. Type of Adjustment Shim
0.1 mm (0.004 in.)
0.2 mm (0.008 in.)
0.5 mm (0.020 in.)
(1) Taper Roller Bearing
(2) Taper Roller Bearing
(3) Bearing Case (Left)
(4) Bearing Case (Right)
(5) Spiral Bevel Gear
D. Bevel Pinion Shaft and Spiral Bevel Gear
Setting