Cub Cadet 8454 Service Manual page 164

CHAPTER 4 8454
C. REAR DIFFERENTIAL GEAR GROUP
(1) Differential Gear Ass'y
(2) Spiral Bevel Gear Ass'y
(3) Spiral Bevel Gear
(4) Spiral Bevel Pinion
(5) Differential Gear Case
(6,7) Differential Side Gear
(8) Differential Pinion Shaft 1
(9) Differential Pinion Shaft 2
a . To Disassembling
1. Loosen four M10 bolt (25) on right side of the trans-
mission case to Disassembling differential bear-
ing case (RH) (23) and shim (21).
2. Loosen four M10 bolts (22) on the left side of the
transmission case to Disassembling differential
bearing case (LH) (19) and shim (21).
3. Remove differential lock shift (18).
4. Draw out differential gear assembly (1) backward
the transmission case.
b. To Assemble
1. Push differential gear assembly (1) forward the
transmission case.
2. Install ball bearing (24) on differential bearing case
(RH) (23) and insert shim (21) to be fixed on the
right side of the transmission case with differential
case assembly (1).
3. Install taper roller bearing (20) on differential bear-
ing case (LH) (19) and insert seam (21) to be fixed
on the left side of the transmission case with differ-
ential case assembly (1).
4-60
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(10) Key
(11) Differential Pinion
(12) Differential Pinion Washer
(13) Cover
(14) Bolt
(15) Bolt
(16) Straight Pin
(17) Shim
4. Decide the shim amount (17) so to allow the turning
torque of spiral bevel gear (3) to be 0.2 to 0.45 kgf·m.
5. Decide the shim amount (21) left and right so to allow
the turning torque to be 0.09 to 0.12 kgf·m after assem-
bling spiral bevel pinion (4) and spiral bevel gear (3).
6. Fix spiral bevel pinion (4) and drive spiral bevel gear
(3) to its turning direction to measure backlash.
[Two place min.: Factory spec. of backlash is 0.15
to 0.25 mm]
Adjustment of BacKlash
If backlash is over the specified value, shift the shim of
the spiral bevel gear side to the opposite side to the spi-
ral bevel gear to adjust without changing the whole shim
amount. To the contrary, if backlash is under the speci-
fied value, shift the opposite shim to the spiral bevel gear
to the spiral bevel gear side to adjust as specified.
7. Check for reaching up between spiral bevel pinion
(4) and spiral bevel gear (3).
8. Install the differential fork on the shift after inserting
differential mounting shift (18) toward the differen-
tial bearing (left).
(18) Differential Lock Shift
(19) Differential Bearing Case (LH)
(20) Ball Bearing
(21) Shim
(22) Bolt
(23) Differential Bearing Case (RH)
(24) Ball Bearing
(25) Bolt
D569-W02 May-2003
569W497A