The Muncie SH8B-U6812-A3KX or SH8BU6812A3KX is an air shift power take-off from Muncie's SH8 Series, built specifically for high-torque truck applications. The integral air shift design keeps the air cylinder contained inside the housing, eliminating the exposed cylinder found on conventional PTOs. The 8-bolt cast iron housing mounts securely to the transmission, and 17 available input gear sets cover most popular transmission configurations. Five speed ratios give installers the flexibility to match PTO output to the driven equipment, while 12 output shaft options accommodate most common hydraulic pump types. Intermittent torque ratings reach 400 lb-ft (542 Nm) at the two lower speed ratios. Call us to confirm proper fit for your application.
Features
Integral air shift design with no exposed air cylinder
8-bolt cast iron housing for secure, high-strength transmission mounting
17 input gear sets to fit most popular transmission models
5 speed ratios for versatility across driven equipment
12 output shaft options compatible with most common hydraulic pump types
Intermittent torque capacity up to 400 lb-ft (542 Nm) at speed ratios 05 and 07
Tech Specs
- Series: Muncie SH8
- Housing: 8-bolt cast iron
- Shift type: Air shift only (integral, no exposed air cylinder)
- Speed ratios available: 5
- Input gear sets available: 17
- Output shaft options: 12
- Intermittent torque (ratios 05, 07): 400 lb-ft / 542 Nm
- Continuous torque (ratios 05, 07): 280 lb-ft / 379 Nm
- Intermittent HP @ 1000 RPM (ratios 05, 07): 76 HP / 57 kW
- Intermittent torque (ratio 09): 375 lb-ft / 508 Nm
- Continuous torque (ratio 09): 263 lb-ft / 356 Nm
- Intermittent HP @ 1000 RPM (ratio 09): 71 HP / 53 kW
- Intermittent torque (ratios 12, 13): 325 lb-ft / 441 Nm
- Continuous torque (ratios 12, 13): 228 lb-ft / 309 Nm
- Intermittent HP @ 1000 RPM (ratios 12, 13): 62 HP / 46 kW
Additional Information
| PTO Torque & Horsepower Ratings | ||||||
|---|---|---|---|---|---|---|
Speed Ratio | Intermittent HP@1000 RPM | Intermittent Torque lbs.ft. | Continuous Torque lbs.ft. | Intermittent (kw)@1000 RPM | Intermittent Torque (NM) | Continuous Torque (NM) |
| 05 | 76 | 400 | 280 | (57) | (542) | (379) |
| 07 | 76 | 400 | 280 | (57) | (542) | (379) |
| 09 | 71 | 375 | 263 | (53) | (508) | (356) |
| 12 | 62 | 325 | 228 | (46) | (441) | (309) |
| 13 | 62 | 325 | 228 | (46) | (441) | (309) |
Parts manual and diagrams: Muncie SH8 Series PTO parts list with prices
