The Chelsea 281 Series Power Take-Off, part number 281GGFJW-E5RK or 281GGFJWE5RK, is a hydraulically shifted hot-shift PTO designed for automatic transmissions with a 10-bolt aperture, commonly found on Allison transmissions. The 281 Series is an evolution of the 280 Series, adding a ductile iron bearing cap rated 117% stronger than gray iron, an o-ring sealing configuration to improve clamp load, and an 80% thicker clutch pack to resist premature tooth wear. The series carries a continuous torque rating of 390 lb-ft and offers nine speed ratios covering both low and high ranges. Applications include fire and rescue, truck cranes, refuse, and pumper-cleaner equipment. Call us to confirm proper fit for your specific transmission and application.
The Chelsea 281 Series PTO supersedes and improves upon the 280 Series platform. Parker Chelsea publishes supporting documentation for this series including the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual. Rotatable cast-iron flanges reduce interference and pump clearance issues. The positive stop feature on driveline outputs eliminates oil seal damage caused by coupling contact. The included hose eliminates the need to order that component separately.
Features
Ductile iron bearing cap rated 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 80% thicker steel disks to resist premature tooth wear
Nine speed ratios including low and high speeds
Wet spline lubrication option provides 7 to 10 times greater shaft life
Electronic Overspeed Control (EOC) protects driven equipment; SmartStart reduces shock load at start-up
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic (PowerShift / Hot Shift)
- Continuous Torque Rating: 390 lb-ft (529 Nm)
- Transmission Compatibility: Allison automatic transmissions (10-bolt aperture)
- Output Types: 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, SmartStart 1-1/4 in. round shaft with 5/16 in. key, 1410 companion flange, DIN 100 flange, DIN 120 flange, DIN 5462 pump spline
- Shaft Power: 37 HP at 500 RPM, 74 HP at 1000 RPM
- Lubricant Options: Pressure lube (P), Wet spline (W)
- Continuous Operation: Yes
- Markets: Fire and rescue, truck cranes, refuse, pumper-cleaner
Additional Information
The Chelsea 281 Series PTO supersedes and improves upon the 280 Series platform. Parker Chelsea publishes supporting documentation for this series including the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual. Rotatable cast-iron flanges reduce interference and pump clearance issues. The positive stop feature on driveline outputs eliminates oil seal damage caused by coupling contact. The included hose eliminates the need to order that component separately.
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
