Cub Cadet 8454 - Manual (Page 118)

CHAPTER 4 8454
4-14 D569-W03 June-2003
Block-type Synchromesh Mechanism
(For Main Gear Shift, Hi-Lo Range Shift Section)
The hub (3) is splined to the counter shaft (9) and the
shifter (5) is mounted on the synchronizer keys (4) out
against the shifter (5). The bronze synchronizer rings
(2), (7) are cone-shaped and match the conical shape
of the gear (1), (8) shoulders which they contact.
These cone-shaped surfaces provide the frictional force
to synchronized the speed of the first shaft with the
gears (1), (8).
(1) Gear (6) Synchronizer Spring
(2) Synchronizer Ring (7) Synchronizer Ring
(3) Hub (8) Gear
(4) Synchronizer Key (9) Shuttle Shaft
(5) Shifter
569W410A
3.4 OPERATION
(1) Shuttle Shaft
(2) 24 Gear
(3) 29 Gear
(4) Shifter
(5) Reverse Shaft
(6) 21 Gear (Idle Gear)
(7) 26-26 Gear
3.4.1FEATURES
A. SHUTTLE
• Synchro shuttle is applied with the features as
below.
1. As for forward reverse switching over, the same
stage in forward and reverse can be obtained if rais-
ing slightly the shuttle lever from neutral and mov-
ing forward and reverse straightly.
2. Structure is so applied conveniently to operate the
shuttle lever as installed on the steering column
side.
3. In consideration of endurance for the shuttle
(forward ↔ reverse) shift section, synchronizer ring
which is coated with molybdenum is applied on the
taper section. 569W409A