The Chelsea 281 Series Power Take-Off, part number 281GDFJP-G5RZ or 281GDFJPG5RZ, is a hydraulically shifted hot-shift PTO engineered for automatic transmissions with a 10-bolt aperture, commonly found on Allison transmissions. The 281 Series is an evolution of the 280 Series platform, featuring a ductile iron bearing cap rated 117% stronger than gray iron, an o-ring sealing configuration between the housing and bearing cap for improved clamp load, and an enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear. Nine speed ratios cover both low and high ranges. Rotatable cast-iron flanges reduce interference clearance issues, and a Wet Spline Lubrication option is available for 7 to 10 times greater shaft life. Call us to confirm proper fit for your application.
The Chelsea 281 Series PTO is documented in the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual. Stud kit and pump support bracket accessories are also available. Part number 281GDFJP-G5RZ is sold individually (each). NMFC classification: 125820, Hydraulic PTOs, Pumps, Motors, etc.
Features
Hydraulic PowerShift (hot-shift) operation, compatible with Allison 10-bolt transmission aperture
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring sealing configuration between housing and bearing cap improves clamp load and resists vibrational effects
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 reduces shock load at start-up
Wet Spline Lubrication option provides 7 to 10 times greater shaft life; hose included
Tech Specs
- Mounting Type: 10-Bolt aperture (Allison automatic transmissions)
- Shift Type: Hydraulic PowerShift (hot-shift)
- Continuous Operation: Yes
- Series Continuous Torque Rating: 390 lb-ft (529 Nm) - check application pages for actual torque ratings
- Series Intermittent Torque Range: 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 (28 kW at 500 RPM / 55 kW at 1000 RPM)
- Output Types Available: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Output Shaft Options: 1-1/4" round (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
- Lubrication: Pressure Lube or Wet Spline option
- Speed Ratios: Nine, including low and high
- Typical Markets: Fire and Rescue, Truck Cranes, Pumper Cleaner, Refuse
Additional Information
The Chelsea 281 Series PTO is documented in the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual. Stud kit and pump support bracket accessories are also available. Part number 281GDFJP-G5RZ is sold individually (each). NMFC classification: 125820, Hydraulic PTOs, Pumps, Motors, etc.
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
