The Muncie A20-A1005-H21BBUB or A20A1005H21BBUB is a medium-duty, 10-bolt clutch shift power takeoff designed specifically for Allison 3000 and 4000 Series transmissions. The shift cover rotates a full 360 degrees, giving installers flexibility in tight engine tunnels, and the pump flange is also rotatable to match a wide range of hydraulic pump configurations. Three housing arrangements are available within the A20 Series, and the unit accepts the EX Drive shaft extension for added installation versatility. Tapered roller bearings extend service life, and the increased-diameter output shaft adds durability under sustained load. The proven clutch pack carries a single intermittent/continuous torque rating, simplifying spec selection. Available from Pro Gear and Transmission. Call us to confirm proper fit for your application.
Features
10-bolt clutch shift PTO for Allison 3000 and 4000 Series transmissions
Shift cover allowing 360-degree rotation for flexible installation positioning
Rotatable pump flange to accommodate various hydraulic pump alignments
Tapered roller bearings for extended PTO service life
Increased output shaft diameter for higher durability under sustained load
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) |
