The Muncie A20 Series Power Take-Off, part number A20-A1005-SX51XBX or A20A1005SX51XBX, is a medium-duty clutch shift PTO engineered for Allison 3000 and 4000 Series transmissions. It mounts via a 10-bolt pattern and uses a proven clutch pack design with tapered roller bearings to extend service life. The shift cover rotates 360 degrees for flexible installation, and the rotatable pump flange simplifies hydraulic plumbing. An increased-diameter output shaft adds durability under load. The A20 Series carries a single intermittent/continuous torque rating, is available in three housing arrangements, and accepts the EX Drive shaft extension. Call us to confirm proper fit for your specific transmission and chassis configuration.
Features
10-bolt clutch shift design for Allison 3000 and 4000 Series transmissions
Rotatable pump flange and 360-degree rotating shift cover for flexible installation
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; single intermittent/continuous torque rating
Tech Specs
- Mounting: 10-bolt
- Shift type: Clutch shift
- Transmission application: Allison 3000 Series and 4000 Series
- Shift cover rotation: 360 degrees
- Housing arrangements: Three
- EX Drive shaft extension compatible: Yes
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) |
