281GBFJP-B3XD Chelsea PTO Assembly

The Chelsea 281 Series Power Take-Off, part number 281GBFJP-B3XD or 281GBFJPB3XD, is a hydraulically shifted (PowerShift) hot-shift PTO built for automatic transmissions with a 10-bolt aperture, including Allison transmissions. It carries a single, continuous duty torque rating and is available in nine speed ratios covering both low and high ranges. The ductile iron bearing cap is 117% stronger than gray iron, and an O-ring sealing configuration between the housing and bearing cap improves clamp load while reducing vibrational effects. The clutch pack features steel discs that are 80% thicker than the predecessor 280 Series design. Rotatable cast-iron flanges reduce interference clearance issues, and the Wet Spline Lubrication option extends shaft life by 7 to 10 times. SmartStart reduces shock load at engagement for compatible applications, and Electronic Overspeed Control (EOC) protects downstream driven equipment. Call us to confirm proper fit for your transmission and output configuration.

Features

10-Bolt mounting aperture, compatible with Allison automatic transmissions
Hydraulic PowerShift (hot-shift) operation with single continuous duty torque rating
Ductile iron bearing cap rated 117% stronger than gray iron predecessor
O-ring seal between housing and bearing cap improves clamp load and resists vibrational damage
Clutch pack steel discs are 80% thicker than 280 Series for reduced tooth wear
Nine speed ratios including low and high speeds; Wet Spline Lubrication option extends shaft life 7-10 times
SmartStart reduces engagement shock load; Electronic Overspeed Control (EOC) protects driven equipment
Hose included; no separate order required

Tech Specs

• Mounting Type: 10-Bolt
• Shift Type: PowerShift (Hydraulic) - Hot Shift
• Transmission Compatibility: Allison automatic transmissions
• Continuous Operation: Yes
• Speed Ratios: Nine (includes low and high speeds)
• Bearing Cap Material: Ductile Iron (117% stronger than gray iron)
• Seal Type: O-ring configuration between housing and bearing cap
• Clutch Pack: Steel discs 80% thicker than 280 Series
• Wet Spline Lubrication Option: Extends shaft life 7-10 times
• SmartStart: Available for compatible applications
• Electronic Overspeed Control (EOC): Included
• Hose: Included
• NMFC Code: 125820 - Hydraulic PTOs, Pumps, Motors

Additional Information

The 281 Series is an evolution of the Chelsea 280 Series PTO, incorporating upgraded materials and sealing throughout. Applicable markets include fire and rescue, truck cranes, pumper-cleaner units, and refuse vehicles. Output options for the 281 Series include SAE B pump flange, SAE C pump flange, ISO 7652 pump flange, and driveline configurations. Shaft types available across the series include Smart Start round shaft (1-1/4 in. with 5/16 in. key), 3/4 in. 11-tooth pump spline, SAE B 7/8 in. 13-tooth pump spline, SAE C 1-1/4 in. 14-tooth pump spline, DIN 5462 pump spline, 1410 companion flange, DIN 120 flange, and DIN 100 flange. Relevant Parker Chelsea documentation includes: 281/288 Series Parts List (HY25-2281-M1/US); 267/281/288/871/878 Series Owner's Manual; and 281 Series Sales Literature.

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