The Muncie A20-A1012-HH31XXX or A20A1012HH31XXX is a medium-duty, clutch shift power take-off designed specifically for Allison 3000 and 4000 Series transmissions, mounted via a 10-bolt interface. The A20 Series uses a proven clutch pack design with tapered roller bearings to extend service life, and features an increased output shaft diameter for greater durability. The shift cover allows 360-degree rotation, giving installers flexibility on crowded chassis. A rotatable pump flange and increased housing clearance simplify installation, while reduced leak paths and optimized gear geometry keep operation quiet. Three housing arrangements are available, and the unit is compatible with the EX Drive shaft extension. Call us to confirm the right configuration for your application.
Features
10-bolt clutch shift mount designed for Allison 3000 and 4000 Series transmissions
Tapered roller bearings for extended PTO service life
360-degree rotating shift cover for flexible chassis installation
Rotatable pump flange with increased housing clearance
Increased output shaft diameter for higher durability
Compatible with EX Drive shaft extension; three housing arrangements available
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) |
