The Chelsea 281 Series Power Take-Off, part number 281GPFJP-N5XV or 281GPFJPN5XV, is a hydraulically shifted hot-shift PTO engineered for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar applications. The 281 Series is an evolution of the 280 Series, incorporating a ductile iron bearing cap rated 117% stronger than gray iron, an 80% thicker steel clutch pack to resist premature tooth wear, and an O-ring seal between the housing and bearing cap to improve clamp load. Nine speed ratios cover both low- and high-speed output demands. The series carries a continuous torque rating of 390 lb-ft and supports output configurations including SAE B and SAE C pump flanges, ISO 7652 flanges, and driveline outputs. Rotatable cast-iron flanges reduce interference clearance issues at the pump. Call us to confirm proper fit for your specific transmission and application.
The Chelsea 281 Series is suited for demanding markets including fire and rescue, refuse, truck cranes, and pumper-cleaner equipment. Reference documents for this series include the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual. The Positive Stop feature on driveline output configurations eliminates oil seal damage from coupling, and the included hose removes the need for a separate order on applicable configurations.
Features
Ductile Iron Bearing Cap: 117% stronger than gray iron for increased durability
Enhanced Clutch Pack: Steel disks are 80% thicker than the predecessor 280 Series to resist premature tooth wear
O-Ring Seal Configuration: Reduces vibrational effects and improves clamp load between housing and bearing cap
Nine Speed Ratios: Covers low- and high-speed output requirements in a single unit
Wet Spline Lubrication Option: Provides 7 to 10 times greater output shaft life
Electronic Overspeed Control (EOC) with SmartStart: Protects driven equipment and reduces shock load at start-up
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic) - Hot Shift
- Compatible Transmissions: Allison (10-bolt aperture)
- Continuous Torque Rating: 390 lb-ft (529 Nm) - verify actual rating on application pages
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Output Shaft Options: 1-1/4" Round with 5/16" Key (SmartStart), 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, DIN 120 Flange, DIN 100 Flange
- Shaft Power: 37 HP at 500 RPM, 74 HP at 1,000 RPM
- Lubrication: Pressure Lube or Wet Spline option
- Continuous Operation: Yes
- Speed Ratios: Nine ratios including low and high speeds
- Part Number: 281GPFJP-N5XV or 281GPFJPN5XV
Additional Information
The Chelsea 281 Series is suited for demanding markets including fire and rescue, refuse, truck cranes, and pumper-cleaner equipment. Reference documents for this series include the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual. The Positive Stop feature on driveline output configurations eliminates oil seal damage from coupling, and the included hose removes the need for a separate order on applicable configurations.
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
