The Chelsea 281 Series Power Take-Off, part number 281GDFJP-K5RK or 281GDFJPK5RK, is a hydraulically shifted hot-shift PTO designed for automatic transmissions with a 10-bolt aperture, commonly found on Allison transmissions. An evolution of the top-selling 280 Series, the 281 Series features a ductile iron bearing cap rated 117% stronger than gray iron, an O-ring sealing configuration between the housing and bearing cap to improve clamp load and resist vibration, and an enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear. Nine speed ratios cover both low and high-speed applications. Rotatable cast-iron flanges reduce interference fitment issues, and a Positive Stop for driveline outputs eliminates oil seal damage from coupling. Available markets include fire and rescue, refuse, truck cranes, and pumper-cleaner equipment. Call us to confirm proper fit for your transmission and application.
The 281 Series is designed for demanding hydraulic applications in fire and rescue, refuse, truck crane, and pumper-cleaner equipment. Parker Chelsea 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.
Features
Hydraulic PowerShift (hot-shift) operation for 10-bolt automatic transmissions including Allison
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring seal configuration between housing and bearing cap improves clamp load and resists vibration
Enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear
Nine speed ratios including low and high speeds
Electronic Overspeed Control (EOC) protects driven equipment; SmartStart option reduces shock load at start-up
Wet Spline Lubrication option provides 7 to 10 times greater shaft life
Hose included, no separate order required
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift (Hot-Shift)
- 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
- Transmission Compatibility: Allison automatic (10-bolt aperture)
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Output Shaft Options: SmartStart Round Shaft (1-1/4" with 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, DIN 120 Flange, DIN 100 Flange
- Lubrication: Pressure Lube or Wet Spline options available
- Speed Ratios: Nine, including low and high
- Part Number: 281GDFJP-K5RK or 281GDFJPK5RK
Additional Information
The 281 Series is designed for demanding hydraulic applications in fire and rescue, refuse, truck crane, and pumper-cleaner equipment. Parker Chelsea 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.
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
