The Muncie A20 Series power take-off, part number A20-A1012-HX3ZBPX or A20A1012HX3ZBPX, is a medium-duty clutch shift PTO engineered specifically for Allison 3000 and 4000 Series transmissions, mounted via a 10-bolt interface. The shift cover rotates 360 degrees for flexible installation positioning, and the pump flange is rotatable to suit various hydraulic plumbing layouts. Tapered roller bearings extend service life, and the clutch pack design carries a single intermittent/continuous torque rating across the speed range. Three housing arrangements are available, and the unit accepts the EX Drive shaft extension. Extended-length PTO mounting fasteners and increased clearance simplify installation. Call us to confirm the correct configuration for your application.
Features
Clutch shift operation with 10-bolt mounting for Allison 3000 and 4000 Series transmissions
Shift cover allows 360-degree rotation for flexible installation
Rotatable pump flange accommodates multiple hydraulic plumbing orientations
Tapered roller bearings for extended PTO service life
Increased output shaft diameter for added durability
Compatible with EX Drive shaft extension; three housing arrangements available
Tech Specs
- Mounting: 10-bolt
- Shift type: Clutch shift
- Compatible transmissions: Allison 3000 Series, Allison 4000 Series
- Shift cover rotation: 360 degrees
- Bearing type: Tapered roller
- Housing arrangements: Three
- EX Drive shaft extension compatibility: Yes
- Speed ratio 5: 74% engine speed (3000 Series), 105% engine speed (4000 Series), 77 HP (57 kW) @ 1,000 RPM intermittent/continuous, 400 lb.ft. (542 Nm) torque rating
- Speed ratio 6: 85% engine speed (3000 Series), 122% engine speed (4000 Series), 77 HP (57 kW) @ 1,000 RPM, 400 lb.ft. (542 Nm)
- Speed ratio 7: 99% engine speed (3000 Series), 141% engine speed (4000 Series), 79 HP (59 kW) @ 1,000 RPM, 415 lb.ft. (563 Nm)
- Speed ratio 8: 114% engine speed (3000 Series), 163% engine speed (4000 Series), 69 HP (51 kW) @ 1,000 RPM, 360 lb.ft. (488 Nm)
- Speed ratio 9: 122% engine speed (3000 Series), 175% engine speed (4000 Series), 65 HP (48 kW) @ 1,000 RPM, 340 lb.ft. (461 Nm)
- Speed ratio 10: 131% engine speed (3000 Series), 187% engine speed (4000 Series), 59 HP (44 kW) @ 1,000 RPM, 310 lb.ft. (420 Nm)
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) |
