Features
Ductile iron bearing cap rated 117% stronger than gray iron for increased durability
O-ring sealing configuration between housing and bearing cap improves clamp load and resists vibration
80% thicker steel discs in the clutch pack to resist premature tooth wear
Nine speed ratios including low and high speeds; single continuous duty torque rating
Wet spline lubrication option provides 7 to 10 times greater output shaft life
Electronic Overspeed Control (EOC) and SmartStart to reduce shock load at start-up
Rotatable cast iron flanges reduce interference and improve pump clearance
Positive stop for driveline outputs eliminates oil seal damage from coupling
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic)
- Transmission Compatibility: Allison automatic transmissions (10-bolt aperture)
- Continuous Torque: 390 lb-ft (529 Nm) - see application pages for actual torque ratings
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, DIN 120 Flange, DIN 100 Flange, Driveline
- Output Shaft Options: SmartStart Round Shaft (1-1/4" - 5/16" Key), 3/4"-11T Pump Spline, SAE B (7/8"-13T) Pump Spline, SAE C (1-1/4"-14T) Pump Spline, DIN 5462 Pump Spline, 1410 Companion Flange
- Shaft Power: 37 HP at 500 RPM, 74 HP at 1000 RPM
- Speed Ratios: Nine (includes low and high speeds)
- Lubrication: Wet Spline option available
- Continuous Operation: Yes
- NMFC Code: 125820, Class 77.5 (Hydraulic PTOs)
Additional Information
The Chelsea 281 Series is suited for demanding vocational markets including fire and rescue, truck cranes, pumper-cleaner units, and refuse vehicles. Relevant Parker documentation includes the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual. The part number 281GCFJW-B3RY is also referenced as SP281GCFJW-B3RY in some catalog systems.
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
