281GPFJP-D8RY Chelsea PTO Assembly

The Chelsea 281GPFJP-D8RY or 281GPFJPD8RY is a 281 Series Power Take-Off built for automatic transmissions with a 10-bolt aperture, including Allison applications. It uses hydraulic PowerShift engagement for continuous-duty operation and offers nine speed ratios spanning both low and high ranges. The 281 Series is an evolution of Chelsea's top-selling 280 Series, with a ductile iron bearing cap rated 117% stronger than gray iron and an 80% increase in clutch pack disc thickness to resist premature tooth wear. An o-ring sealing configuration between the housing and bearing cap improves clamp load and reduces the vibrational effects of modern engine designs. Output options include SAE B and SAE C pump flanges, ISO 7652 flange, and driveline configurations. Call us to confirm proper fit for your specific transmission and application.

Features

10-bolt mounting for Allison and Caterpillar automatic transmissions
Hydraulic PowerShift (hot shift) engagement for continuous-duty operation
Ductile iron bearing cap - 117% stronger than gray iron predecessor
Enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear
O-ring sealing configuration between housing and bearing cap improves clamp load and reduces vibration effects
Nine speed ratios including low and high speeds
Rotatable cast-iron flanges reduce interference and improve pump clearance
Positive stop on driveline outputs eliminates oil seal damage from coupling
Wet spline lubrication option provides 7 to 10 times greater shaft life
SmartStart reduces shock load at start-up; Electronic Overspeed Control (EOC) protects driven equipment

Tech Specs

• Mounting: 10-Bolt aperture
• Shift Type: Hydraulic PowerShift (hot shift)
• Compatible Transmissions: Allison automatic transmissions
• Continuous Operation: Yes
• Speed Ratios: Nine, including low and high speeds
• Output Types: SAE B pump flange, SAE C pump flange, ISO 7652 pump flange, Driveline
• Output Shaft Options: SAE B (7/8 in. - 13T) pump spline, SAE C (1-1/4 in. - 14T) pump spline, 3/4 in. - 11T pump spline, SmartStart round shaft (1-1/4 in. - 5/16 in. key), 1410 companion flange, DIN 120 flange, DIN 100 flange, DIN 5462 pump spline
• Lubrication: Pressure lube (P) or Wet Spline (W) option
• Series Continuous Torque Rating: 390 lb-ft (529 Nm) - see application pages for actual torque ratings
• Series Output Power: 56+ HP (51+ kW)
• Series Shaft Power: 37 HP at 500 RPM / 74 HP at 1000 RPM (28 kW at 500 RPM / 55 kW at 1000 RPM)
• Part Number: 281GPFJP-D8RY or 281GPFJPD8RY

Additional Information

The Chelsea 281 Series is suited for demanding markets including fire and rescue, truck cranes, pumper cleaner, and refuse vehicles. The hose is included with this assembly - no need to order separately. 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, available through Parker Chelsea resources.

Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.