Features
Hydraulic PowerShift (hot-shift) operation for use with automatic transmissions
Ductile iron bearing cap, 117% stronger than gray iron
O-ring sealing configuration between housing and bearing cap improves clamp load and reduces vibrational effects
Enhanced clutch pack with steel discs 80% thicker than predecessor to resist premature tooth wear
Nine speed ratios covering low and high speed ranges
Wet Spline Lubrication option provides 7 to 10 times greater shaft life
SmartStart feature reduces shock load at start-up for compatible applications
Electronic Overspeed Control (EOC) protects driven equipment
Rotatable cast iron flanges reduce pump clearance interference issues
Positive stop for driveline outputs eliminates oil seal damage from coupling
Tech Specs
- Mounting Type: 10-Bolt aperture
- Shift Type: PowerShift (Hydraulic hot-shift)
- Transmission Compatibility: Allison automatic transmissions (10-bolt aperture)
- Continuous Operation: Yes
- Continuous Torque: 390 lb-ft (529 Nm) - verify actual rating on application pages
- Intermittent Torque: 301 to 400 lb-ft (501+ Nm)
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 37 HP at 500 RPM / 74 HP at 1000 RPM (28 kW at 500 RPM / 55 kW at 1000 RPM)
- Speed Ratios: Nine, including low and high speeds
- Output Types Available: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Output Shaft Options: 3/4 in. 11-tooth pump spline, SAE B 7/8 in. 13-tooth pump spline, SAE C 1-1/4 in. 14-tooth pump spline, DIN 5462 pump spline, 1410 companion flange, DIN 120 flange, DIN 100 flange, SmartStart round shaft 1-1/4 in. with 5/16 in. key
- Lubricant Options: Pressure Lube (P), Wet Spline (W)
- Part Number: 281GCFJP-G8RB or 281GCFJPG8RB
- Series: Chelsea 281 Series
Additional Information
The Chelsea 281 Series is an evolution of the 280 Series PTO platform, developed for demanding continuous-duty markets including fire and rescue, refuse collection, truck cranes, and pumper-cleaner applications. The 281 Series PTO manual and parts list (Parker document HY25-2281-M1/US) covers 281 and 288 Series units. The combined owner's manual covers 267, 281, 288, 871, and 878 Series. Contact Pro Gear and Transmission if you need help cross-referencing this part to your transmission configuration or locating applicable documentation.
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
