Parts & service
Air Champ Clutch Model BWC
Manufactured by Norman G Clark under licence since 1962.
On this page: Clutch Dimensions Spare parts Air connections Troubleshooting
BWC
Clutch
| NGC part no. | Description | Nexen part no. |
|---|---|---|
| AA0001 | BWC Clutch – 5/8″ Bore Pilot Mount | 800100 |
| AA0011 | BWC Clutch – 5/8″ Bore Pulley Mount | |
| AA0002 | BWC Clutch – 16mm Bore Pilot Mount | |
| AA0012 | BWC Clutch – 16mm Bore Pulley Mount |
Specifications
| Diameter | 3″ |
BWC
Dimensions
Dimensions show in the chosen part number’s primary unit – use the mm / in buttons to switch. Choose a pilot mount (AA0001, AA0002) or pulley mount (AA0011, AA0012) part number under the drawing. Side shows the lengths, diameters and air inlet; Front shows the tapped holes (pilot mount), bore [A] and keyway [B] [C].
Norman G Clark endeavours to keep specifications up to date. Please confirm specifications with Norman G Clark before purchasing.
Bore and keyway
| Clutch part no. | Hub part no. | Primary UoM | Bore diameter [A] | Keyway height [B] | Keyway width [C] |
|---|---|---|---|---|---|
| AA0001 | AA1001 | Imperial [inches] | 0.6255″+0.0005″ (15.89 mm) | 0.714″±0.005″ (18.14 mm) | 0.189″±0.001″ (4.80 mm) |
| AA0002 | AA1030 | Metric [mm] | 16mm+0.026mm | 18.4mm±0.127mm | 5mm±0.026mm |
| AA0011 | AA1001 | Imperial [inches] | 0.6255″+0.0005″ (15.89 mm) | 0.714″±0.005″ (18.14 mm) | 0.189″±0.001″ (4.80 mm) |
| AA0012 | AA1030 | Metric [mm] | 16mm+0.026mm | 18.4mm±0.127mm | 5mm±0.026mm |
Weight and carton
| Weight | 1.4 kg |
| Carton | 14.5cm x 14.5cm x 14.5cm |
BWC
Spare Parts
| Item | NGC part no. | Description | Qty |
|---|---|---|---|
| 1 | AA1001 | Hub 5/8″ Bore | 1 |
| 1 | AA1030 | Hub 16mm Bore | 1 |
| 2 | AA1019 | Retaining Ring (External) | 1 |
| 3 | AA1008 | Ball Bearing | 1 |
| 4 | AA1031 | Pulley/Sheave* | 1 |
| 5 | AA1009 | Compression Spring | 1 |
| 6 | AA1042 | Key | 1 |
| 7 | AA1020 | Friction Disc & Standard Facing | 1 |
| 8 | AA1012 | Thrust Bearing | 2 |
| 9 | AA1006 | Air Chamber | 1 |
| 10 & 11 | AA1010 | O-Ring Seal Set | 1 |
| 13 | AA1007 | Piston | 1 |
| 14 | AA1013 | Thrust Washer | 1 |
| 15 | AA1002 | Pilot Mount Disc* | 1 |
| 22 | AA1058 | Grub Screw | 2 |
| 23 | A7350 | Washer | 2 |
BWC
Air Connections
BWC
Troubleshooting Guide
| Symptom | Possible cause | Solution |
|---|---|---|
| Failure to engage | Air not getting to the clutch due to a control valve malfunction or low air pressure | Check control valve and air pressure setting |
| Defective O-ring Seals causing air leaks | Replace O-ring Seals | |
| Lack of lubrication on the Hub spline or in the air chamber | Lubricate the Hub spline with a thin film of Never Seez® or check air line lubricator settings | |
| Rigid pipe or tubing for air line connections | Use flexible pipe or tubing for all air line connections | |
| Failure to disengage | Friction lock due to a lack of lubrication on the Hub spline or in the air chamber | Lubricate the Hub spline with a thin film of Never Seez® or check air line lubricator settings |
| Broken Return Spring | Install a new Return Spring | |
| Unexhausted air due to a control valve malfunction | Check or replace control valve | |
| Excessive drag on the air line | Defective Bearings | Replace Bearings |
| Air line is not properly supported | Rest the air line against a support that is parallel to the center line of the clutch |