CLUTCH-FREEWHEELING
DESCRIPTION
Freewheeling clutches are installed in the front planetary gear set between the sun gear and the stator shaft, and in the rear planetary gear set between the sun gear and the intermediate shaft.
The freewheel consists of an outer race (4), an inner race (7), a number of locking elements (3) and a cage (6) for these locking elements.
OPERATION
The freewheeling clutch optimizes individual gearshifts. They lock individual elements of a planetary gear set together or against the transmission housing in one direction of rotation to allow the torque to be transmitted.
If the inner race (7) of the freewheeling clutch is locked and the outer race (4) turns counter-clockwise (1), the locking elements (3) adopt a diagonal position on account of their special contours, allowing the freewheel function. The inner race (4) slides under the locking elements (3) with minimal friction. If the rotation of the outer race (4) changes to clockwise (2), the locking elements (3) stand up and lock the outer and inner races (4, 7) together.
DISASSEMBLY
| Freewheeling Clutch F2 |
| 1 - HOLLOW SHAFT | 4 - K3 INNER DISC CARRIER AND REAR PLANETARY SUN GEAR |
| 2 - F2 CLUTCH SNAP-RING | 5 - RETAINING RING |
| 3 - FREEWHEELING CLUTCH F2 | 6 - O-RINGS |
1. Remove retaining ring (5) from hollow shaft (1).
2. Remove rear sun gear (4) with the K3 internally toothed disk carrier and rear freewheeling clutch F2 (3).
3. Remove snap-ring (2) for freewheel.
4. Press freewheeling clutch (3) out of sun gear.
5. Check O-rings (6), replace if necessary.
6. Check the anti-friction bearing (2) in the rear planetary sun gear for damage. Replace as necessary.
ASSEMBLY
| Freewheeling Clutch F2 |
| 1 - HOLLOW SHAFT | 4 - K3 INNER DISC CARRIER AND REAR PLANETARY SUN GEAR |
| 2 - F2 CLUTCH SNAP-RING | 5 - RETAINING RING |
| 3 - FREEWHEELING CLUTCH F2 | 6 - O-RINGS |
NOTE: The side of the freewheeling clutch F2 (3) with the markings (directional arrow, part number, etc.) must be up when the clutch is installed in the sun gear (4).
1. Press freewheeling clutch F2 (3) into sun gear (4).
2. Install snap-ring (2) for freewheeling clutch.
3. Check O-rings (6) on hollow shaft, replace if necessary.
4. Install rear sun gear (4) with K3 internally toothed disc carrier and rear freewheeling clutch (3) onto the hollow shaft.
5. Verify proper operation of the freewheeling clutch F2. When the assembly is held with the F2 clutch snap-ring upward, it should be possible to rotate the hollow shaft counter-clockwise.
6. Install retaining ring (5) onto hollow shaft (1).