The Chelsea 281 Series Power Take-Off, part number 281GBFJP-E8BD or 281GBFJPE8BD, is a hydraulically shifted hot-shift PTO engineered for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar units. The 281 Series is an evolution of the 280 Series, featuring 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 an 80% thicker clutch pack to resist premature tooth wear. Nine speed ratios cover both low and high ranges, and the wet spline lubrication option delivers 7 to 10 times greater shaft life. Electronic Overspeed Control (EOC) and SmartStart are available to protect driven equipment and reduce shock load at engagement. Call us to confirm proper fit for your transmission and application.
Related Parker Chelsea documents: 281/288 Series Parts List (HY25-2281-M1/US); 267/281/288/871/878 Series Owner's Manual; 281 Series Sales Literature; Chelsea PTO Stud Kits (HY25-2002-M1_US).
Features
10-bolt mounting for Allison and Caterpillar automatic transmissions
Hydraulic PowerShift (hot-shift) operation for continuous-duty use
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring seal between housing and bearing cap improves clamp load and resists vibration
80% thicker steel clutch pack discs resist premature tooth wear
Nine speed ratios including low and high speeds; wet spline lubrication option extends shaft life 7 to 10 times
SmartStart reduces engagement shock load; Electronic Overspeed Control (EOC) protects driven equipment
Tech Specs
- Mounting: 10-Bolt
- Shift Type: Hydraulic PowerShift (Hot Shift)
- Continuous Operation: Yes
- Transmission Application: Allison, Caterpillar (automatic transmissions)
- Series Continuous Torque: 390 lb-ft (529 Nm) -- verify actual rating on application page
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 37 HP at 500 RPM / 74 HP at 1,000 RPM
- Speed Ratios: Nine (includes low and high)
- Lubrication: Pressure lube or wet spline options
- Output Types: SAE B pump flange, SAE C pump flange, ISO 7652 pump flange, driveline
- Markets: Fire and Rescue, Truck Cranes, Pumper Cleaner, Refuse
Additional Information
Related Parker Chelsea documents: 281/288 Series Parts List (HY25-2281-M1/US); 267/281/288/871/878 Series Owner's Manual; 281 Series Sales Literature; Chelsea PTO Stud Kits (HY25-2002-M1_US).
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
