The Muncie A20 Series power take-off, part number A20-A1011-HX1PBPX or A20A1011HX1PBPX, is a medium-duty clutch shift PTO engineered specifically for Allison 3000 and 4000 Series transmissions, mounting via a 10-bolt pattern. The shift cover rotates a full 360 degrees, giving installers flexibility to position the actuation point without modifying the housing. A rotatable pump flange and extended-length PTO mounting fasteners address tight mounting envelopes. Tapered roller bearings replace standard ball bearings to extend service life under sustained load. The enlarged output shaft diameter handles higher torque demand, and the gear profile has been refined to reduce operating noise. A single intermittent/continuous torque rating simplifies spec selection. Three housing arrangements are available, and the unit accepts the EX Drive shaft extension. Call us to confirm proper fit for your application.
Features
Clutch shift design for Allison 3000 and 4000 Series transmissions, 10-bolt mounting
Shift cover allows full 360-degree rotation for flexible installation positioning
Rotatable pump flange with increased housing clearance for easier install
Tapered roller bearings for extended PTO service life
Increased output shaft diameter for higher torque capacity
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
- Bearings: Tapered roller
- 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) |
