The Muncie A20-A1011-HX3BBBX or A20A1011HX3BBBX is a medium-duty, 10-bolt clutch shift power take-off engineered specifically for Allison 3000 and 4000 Series transmissions. The A20 Series design centers on a rotatable pump flange and a shift cover with 360-degree rotation, giving installers flexibility in tight engine compartments. Tapered roller bearings extend service life, and an increased output shaft diameter adds durability under load. The proven clutch pack carries a single intermittent/continuous torque rating across three available housing arrangements. Extended-length PTO mounting fasteners and reduced leak paths simplify installation and long-term maintenance. The unit is also compatible with the EX Drive shaft extension. Call us to confirm proper fit for your application.
Features
Clutch shift engagement, 10-bolt mounting for Allison 3000 and 4000 Series transmissions
Rotatable pump flange with shift cover allowing 360-degree rotation
Tapered roller bearings for extended PTO service life
Increased output shaft diameter for added durability under load
Three housing arrangements available; compatible with EX Drive shaft extension
Extended-length PTO mounting fasteners and reduced leak paths for cleaner installation
Tech Specs
- Mounting: 10-bolt
- Shift Type: Clutch shift
- Transmission Application: Allison 3000 Series and 4000 Series
- Housing Arrangements: Three available
- Shaft Extension Compatibility: EX Drive shaft extension
- Pump Flange: Rotatable
- Shift Cover Rotation: 360 degrees
- Bearing Type: Tapered roller
- Torque Rating: Single intermittent/continuous rating
Additional Information
| SPEED | 3000 SERIES | 4000 SERIES | INTERMITTENT CONTINUOUS HP (KW) | INTERMITTENT/CONTINOUS |
| RATIO | ENGINE % | ENGINE % | @ 1,000 RPM | TORQUE LBS.FT. (NM) |
| 5 | 74% | 105% | 77 (57) | 400 (542) |
| 6 | 85% | 122% | 77 (57) | 400 (542) |
| 7 | 99% | 141% | 79 (59) | 415 (563) |
| 8 | 114% | 163% | 69 (51) | 360 (488) |
| 9 | 122% | 175% | 65 (48) | 340 (461) |
| 10 | 131% | 187% | 59 (44) | 310 (420) |
| 11 | 151% | 215% | 52 (39) | 275 (373) |
| 12 | 162% | 231% | 50 (37) | 265 (359) |
| 15 | 201% | 287% | 39 (29) | 205 (278) |
