The Muncie A20 Series 10-Bolt Clutch Shift Power Take-Off, part number A20-A1005-HX31XPX-XX or A20A1005HX31XPXXX, is a medium-duty clutch shift PTO designed specifically for Allison 3000 and 4000 Series transmissions. The A20 Series uses a proven clutch pack design with tapered roller bearings for extended service life, and features a shift cover with 360-degree rotation so the control can be oriented to suit the installation. The rotatable pump flange, increased housing clearances, and extended-length mounting fasteners simplify installation. The output shaft diameter is upsized for added durability, and the gear profile is optimized to minimize operating noise. The unit is also compatible with the Muncie EX Drive shaft extension. Call us to confirm proper fit for your specific Allison transmission configuration.
Features
Clutch shift design for Allison 3000 and 4000 Series transmissions
Shift cover with 360-degree rotation for flexible control placement
Rotatable pump flange simplifies hydraulic plumbing orientation
Tapered roller bearings for extended PTO service life
Increased output shaft diameter for higher durability
Compatible with Muncie EX Drive shaft extension
Tech Specs
- Mount: 10-Bolt
- Shift Type: Clutch Shift
- Transmission Compatibility: Allison 3000 Series, Allison 4000 Series
- Series: Muncie A20
- Housing Arrangements: Three available
- Torque Rating Type: Single intermittent/continuous rating
- Speed Ratio 5: 74% engine speed (3000 Series), 105% engine speed (4000 Series), 77 hp (57 kW) @ 1,000 RPM, 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) torque rating
- 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) torque rating
- 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) torque rating
- 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) torque rating
- 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) torque rating
- Speed Ratio 11: 151% engine speed (3000 Series), 215% engine speed (4000 Series), 52 hp (39 kW) @ 1,000 RPM, 275 lb.ft. (373 Nm) torque rating
- Speed Ratio 12: 162% engine speed (3000 Series), 231% engine speed (4000 Series), 50 hp (37 kW) @ 1,000 RPM, 265 lb.ft. (359 Nm) torque rating
- Speed Ratio 15: 201% engine speed (3000 Series), 287% engine speed (4000 Series), 39 hp (29 kW) @ 1,000 RPM, 205 lb.ft. (278 Nm) torque rating
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) |
