The Muncie A20-A1008-HH3BBPX or A20A1008HH3BBPX is a medium-duty, 10-bolt clutch shift power take-off engineered specifically for Allison 3000 and 4000 Series transmissions. The A20 Series uses a proven clutch pack design with tapered roller bearings to extend service life, and the shift cover rotates a full 360 degrees for flexible installation. A rotatable pump flange, increased clearance around the unit, and extended-length PTO mounting fasteners reduce installation difficulty. The increased-diameter output shaft adds durability under sustained loads, while a minimized-leak-path housing and gear geometry optimized for quiet operation round out the design. Three housing arrangements are available, and the unit is compatible with the EX Drive shaft extension. Call us to confirm proper fit for your application.
Features
10-bolt clutch shift PTO for Allison 3000 and 4000 Series transmissions
Proven clutch pack design with tapered roller bearings for extended PTO service life
Shift cover rotates 360 degrees for flexible installation orientation
Rotatable pump flange and increased housing clearance for easier installation
Increased output shaft diameter for higher durability under sustained loads
Compatible with EX Drive shaft extension; three housing arrangements available
Tech Specs
- Mounting: 10-bolt
- Shift type: Clutch shift
- Transmission application: Allison 3000 Series and 4000 Series
- Shift cover rotation: 360 degrees
- Housing arrangements: Three
- Output shaft: Increased diameter (see series data)
- Speed ratio 5 - 3000 Series engine %: 74%, 4000 Series engine %: 105%, HP/kW @ 1,000 RPM (intermittent/continuous): 77 (57), Torque lbs.ft. (Nm) intermittent/continuous: 400 (542)
- Speed ratio 6 - 3000 Series engine %: 85%, 4000 Series engine %: 122%, HP/kW @ 1,000 RPM: 77 (57), Torque lbs.ft. (Nm): 400 (542)
- Speed ratio 7 - 3000 Series engine %: 99%, 4000 Series engine %: 141%, HP/kW @ 1,000 RPM: 79 (59), Torque lbs.ft. (Nm): 415 (563)
- Speed ratio 8 - 3000 Series engine %: 114%, 4000 Series engine %: 163%, HP/kW @ 1,000 RPM: 69 (51), Torque lbs.ft. (Nm): 360 (488)
- Speed ratio 9 - 3000 Series engine %: 122%, 4000 Series engine %: 175%, HP/kW @ 1,000 RPM: 65 (48), Torque lbs.ft. (Nm): 340 (461)
- Speed ratio 10 - 3000 Series engine %: 131%, 4000 Series engine %: 187%, HP/kW @ 1,000 RPM: 59 (44), Torque lbs.ft. (Nm): 310 (420)
- Speed ratio 11 - 3000 Series engine %: 151%, 4000 Series engine %: 215%, HP/kW @ 1,000 RPM: 52 (39), Torque lbs.ft. (Nm): 275 (373)
- Speed ratio 12 - 3000 Series engine %: 162%, 4000 Series engine %: 231%, HP/kW @ 1,000 RPM: 50 (37), Torque lbs.ft. (Nm): 265 (359)
- Speed ratio 15 - 3000 Series engine %: 201%, 4000 Series engine %: 287%, HP/kW @ 1,000 RPM: 39 (29), Torque lbs.ft. (Nm): 205 (278)
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) |
