The Muncie A20-A1012-HX3CB or A20A1012HX3CB is a medium-duty, clutch-shift power take-off engineered specifically for Allison 3000 and 4000 Series transmissions. This 10-bolt unit features a shift cover with 360-degree rotation, a rotatable pump flange, and tapered roller bearings for extended service life. The increased output shaft diameter adds durability under sustained loads, while extended-length PTO mounting fasteners and increased installation clearance simplify the swap. Gear geometry is optimized to reduce noise, and reduced leak paths keep the unit cleaner in service. Three housing arrangements and compatibility with the EX Drive shaft extension give installers flexibility for tight or non-standard mounting situations. Call us to confirm proper fit for your application.
Features
Clutch shift operation on a 10-bolt mount for Allison 3000 and 4000 Series transmissions
Shift cover allows 360-degree rotation for flexible installation positioning
Rotatable pump flange adapts to multiple hydraulic plumbing layouts
Tapered roller bearings extend PTO service life
Increased output shaft diameter for higher durability under sustained output
Compatible with EX Drive shaft extension; three housing arrangements available
Tech Specs
- Mounting: 10-bolt
- Shift type: Clutch shift
- Application: Allison 3000 Series and 4000 Series transmissions
- Bearings: Tapered roller
- Shift cover rotation: 360 degrees
- Housing arrangements: Three
- Drive shaft extension compatibility: EX Drive shaft extension
- Speed 5 - 3000 Series engine %: 74% / 4000 Series engine %: 105% / HP (kW) @ 1,000 RPM: 77 (57) / Torque lbs.ft. (Nm): 400 (542)
- Speed 6 - 3000 Series engine %: 85% / 4000 Series engine %: 122% / HP (kW) @ 1,000 RPM: 77 (57) / Torque lbs.ft. (Nm): 400 (542)
- Speed 7 - 3000 Series engine %: 99% / 4000 Series engine %: 141% / HP (kW) @ 1,000 RPM: 79 (59) / Torque lbs.ft. (Nm): 415 (563)
- Speed 8 - 3000 Series engine %: 114% / 4000 Series engine %: 163% / HP (kW) @ 1,000 RPM: 69 (51) / Torque lbs.ft. (Nm): 360 (488)
- Speed 9 - 3000 Series engine %: 122% / 4000 Series engine %: 175% / HP (kW) @ 1,000 RPM: 65 (48) / Torque lbs.ft. (Nm): 340 (461)
- Speed 10 - 3000 Series engine %: 131% / 4000 Series engine %: 187% / HP (kW) @ 1,000 RPM: 59 (44) / Torque lbs.ft. (Nm): 310 (420)
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) |
