The Muncie A20-A1012-HR31XPX or A20A1012HR31XPX is a medium-duty, 10-bolt clutch shift power take-off designed specifically for Allison 3000 and 4000 Series transmissions. The A20 Series features a shift cover with 360-degree rotation and a rotatable pump flange, giving installers the flexibility to position the PTO to clear tight underbody obstructions. Tapered roller bearings support extended service life, and the increased output shaft diameter adds durability under sustained load. The proven clutch pack carries a single intermittent/continuous torque rating, simplifying application selection. Three housing arrangements are available, and the unit accepts the EX Drive shaft extension. Call us to confirm the right configuration for your chassis and upfit.
Features
10-bolt clutch shift PTO designed for Allison 3000 and 4000 Series transmissions
Shift cover allows 360-degree rotation for flexible installation orientation
Rotatable pump flange accommodates varied underbody plumbing layouts
Tapered roller bearings for extended PTO service life
Increased output shaft diameter for higher durability under load
Compatible with EX Drive shaft extension; three housing arrangements available
Tech Specs
- Transmission Compatibility: Allison 3000 Series, Allison 4000 Series
- Mount: 10-bolt clutch shift
- Shift Cover Rotation: 360 degrees
- Bearing Type: Tapered roller bearings
- Housing Arrangements: Three
- Shaft Extension Compatibility: EX Drive shaft extension
- Single intermittent/continuous torque rating
Additional Information
| SPEED | 3000 SERIES | 4000 SERIES | INTERMITTENT CONTINUOUS HP (KW) | INTERMITTENT/CONTINOUS |
| RATIO | ENGINE % | ENGINE % | HP (KW) @ 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) |
