The Muncie A20-A1012-HX3BS or A20A1012HX3BS is a medium-duty, clutch shift power take-off engineered specifically for Allison 3000 and 4000 Series transmissions. The A20 Series mounts via a 10-bolt pattern and features a shift cover with full 360-degree rotation, giving installers flexibility in tight cab configurations. A rotatable pump flange and increased clearance simplify installation. Tapered roller bearings extend service life, and the enlarged output shaft diameter adds durability under sustained loads. The design incorporates reduced leak paths and an optimized gear profile for quieter operation. Three housing arrangements are available, and the unit is compatible with the EX Drive shaft extension. Call us to confirm the right housing and ratio for your application.
Features
10-bolt clutch shift design for Allison 3000 and 4000 Series transmissions
Shift cover allows 360-degree rotation for flexible installation positioning
Rotatable pump flange and increased clearance for easier mounting
Tapered roller bearings for extended PTO service life
Enlarged output shaft diameter for higher durability under load
Compatible with EX Drive shaft extension; three housing arrangements available
Tech Specs
- Mounting: 10-bolt
- Shift type: Clutch shift
- Transmission compatibility: Allison 3000 Series and 4000 Series
- Shift cover rotation: 360 degrees
- Housing arrangements: Three
- EX Drive shaft extension compatibility: 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) |
