Velvet Drive 72C 1.88:1 & 1.91:1 Reduction Unit Diagram (Later Style)
| Ref # | Part # | Description | Qty. |
|---|---|---|---|
| 1 | VD-179864 | Hex head bolt (7/16-14 x 1 3/4) | 2 |
| 2 | VD-103322 | Lockwasher (7/16) | 2 |
| 3 | VD-179840 | Hex head bolt (3/8-18 x 1 1/8) | 6 |
| 4 | CRU-RS2180 | Lockwasher (3/8) | 6 |
| 5 | ALTO-023320 | Coupling nut | 1 |
| 6 | VD-1000031001 | Coupling | 1 |
| 7 | VD-4756D | Snap ring | 1 |
| 8 | VD-1017671001 | Main shaft (1.91:1 only) | 1 |
| 8A | VD-1017171004 | Main shaft (1.88:1 only) | 1 |
| 9 | VD-L3-6 | Ring gear (1.91:1 only) | 1 |
| 9A | VD-1017162001 | Ring gear (1.88:1 only) | 1 |
| 10 | N/A | Bearing assembly | 1 |
| 11 | VD-1000133010 | Bearing cone* | 1 |
| 12 | VD-1000133009 | Bearing cup* | 1 |
| 13 | VD-1017053002 | Solid spacer (.820-.821 inch long)** | 1 |
| 13A | VD-1017053003 | Solid spacer (.829-.830 inch long)** | 1 |
| 13B | VD-1017053004 | Solid spacer (.832-.833 inch long)** | 1 |
| 13C | VD-1017053005 | Solid spacer (.835-.836 inch long)** | 1 |
| 13D | VD-1017053006 | Solid spacer (.838-.839 inch long)** | 1 |
| 13E | VD-1017053007 | Solid spacer (.841-.842 inch long)** | 1 |
| 13F | VD-1017053008 | Solid spacer (.844-.845 inch long)** | 1 |
| 13G | VD-1017053009 | Solid spacer (.847-.848 inch long)** | 1 |
| 13H | VD-1017053010 | Solid spacer (.850-.851 inch long)** | 1 |
| 13I | VD-1017053011 | Solid spacer (.853-.854 inch long)** | 1 |
| 13J | VD-1017053012 | Solid spacer (.856-.857 inch long)** | 1 |
| 14 | VD-1000044017 | Oil seal | 1 |
| 15 | N/A | Bearing assembly | 1 |
| 16 | VD-1000133002 | Bearing cone* | 1 |
| 17 | VD-1000133001 | Bearing cup* | 1 |
| 18 | VD-1017065003 | Reduction housing | 1 |
| 19 | VD-4734 | Snap ring | 1 |
| 20 | VD-L7-104 | Sun gear (1.91:1 only) | 1 |
| 20A | VD-1017165004 | Sun gear (1.88:1 only) | 1 |
| 21 | VD-4853B | Lock bolt (5/16-18 x 3/4) | 6 |
| 22 | VD-114605 | Lockwasher (5/16) (1.88:1 only) | 6 |
| 23 | N/A | Lock plate (1.91:1 only), no longer supplied | 3 |
| 24 | N/A | Pinion carrier assembly (1.91:1 only), no longer supplied | 1 |
| 24A | VD-1017659021 | Pinion carrier assembly (1.88:1 only) | 1 |
| 25 | VD-4827 | Retaining ring | 1 |
| 26 | VD-4717L | Pinion shaft pin | 6 |
| 27 | VD-L5-39 | Pinion shaft | 6 |
| 28 | VD-L3-43 | Pinion thrustwasher | 12 |
| 29 | VD-4741A | Roller bearing (1.91:1 only) | 288 |
| 29A | VD-1000131011 | Roller bearing (1.88:1 only) | 288 |
| 30 | VD-L3-41 | Roller bearing spacer (1.91:1 only) | 18 |
| 30A | VD-1000053024 | Roller bearing spacer (1.88:1 only) | 18 |
| 31 | VD-L4-5 | Pinion gear (1.91:1 only) | 6 |
| 31A | VD-1017163002 | Pinion gear (1.88:1 only) | 6 |
| 32 | VD-L9-150 | Planetary cage (1.91:1 only), no longer supplied | 1 |
| 32A | VD-1017159011 | Planetary cage (1.88:1 only) | 1 |
| 33 | N/A | Pinion carrier gasket (1.91:1 only) | 1 |
| 34 | N/A | Lube oil strainer (1.91:1 only), no longer supplied | 1 |
| 35 | N/A | O-ring (1.91:1 only) | 1 |
| 36 | ALTO-023023 | Rear adapter gasket | 1 |
| 37 | VD-1000183073 | Lock bolt (7/16-14 x 7/8) | 6 |
| 38 | VD-103322 | Lockwasher (7/16) | 6 |
| 39 | N/A | Reduction unit adapter*** (1.91:1 only), no longer supplied | 1 |
| 39A | VD-1017172001 | Reduction unit adapter**** | 1 |
| 40 | VD-4816 | Snap ring | 1 |
| 41 | VD-1000130018 | Bearing | 1 |
| 42 | ALTO-023021 | Front adapter gasket | 1 |
*Replace both parts if one is damaged
**Select correct size spacer at assembly. Only one required.
***For use with 1.91:1 noise reduction parts. These include lock plates (23), pinion carrier gasket (33), and o-ring (35).
****For use with 1.88:1 or 1.91:1 without noise reduction parts.
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