281GGFJP-G5XR Chelsea PTO Assembly

The Chelsea 281 Series Power Take-Off, part number 281GGFJP-G5XR or 281GGFJPG5XR, is a hydraulically shifted hot-shift PTO engineered for automatic transmissions with a 10-bolt aperture, including Allison transmissions. It carries a single, continuous duty torque rating and delivers 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 and reduces vibration effects. The clutch pack features steel discs that are 80% thicker than the previous generation, resisting premature tooth wear. Rotatable cast-iron flanges reduce interference clearance issues, and a Positive Stop for driveline outputs eliminates oil seal damage from coupling. Electronic Overspeed Control (EOC) protects driven equipment. Call us to confirm proper fit for your application.

Features

Hydraulic PowerShift (hot-shift) operation for 10-bolt automatic transmissions including Allison
Ductile iron bearing cap rated 117% stronger than gray iron
O-ring sealing configuration between housing and bearing cap to improve clamp load and reduce vibrational effects
Enhanced clutch pack with steel discs 80% thicker than the 280 Series predecessor
Nine speed ratios including low and high speeds
Wet Spline Lubrication option provides 7 to 10 times greater shaft life
SmartStart reduces shock load at start-up for certain applications
Electronic Overspeed Control (EOC) protects driven equipment
Rotatable cast-iron flanges reduce pump clearance interference
Positive Stop for driveline outputs eliminates oil seal damage from coupling

Tech Specs

• Mounting Type: 10-Bolt
• Shift Type: Hydraulic PowerShift (Hot-Shift)
• Continuous Operation: Yes
• Transmission Application: Allison and Caterpillar automatic transmissions (10-bolt aperture)
• Series Continuous Torque: 390 lb-ft (529 Nm), verify actual rating on application page
• Speed Ratios: Nine, including low and high
• Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
• Output Shaft Options: 3/4 in. 11T Pump Spline, SAE B 7/8 in. 13T Pump Spline, SAE C 1-1/4 in. 14T Pump Spline, 1-1/4 in. Round Shaft with 5/16 in. Key (SmartStart), 1410 Companion Flange, DIN 120 Flange, DIN 100 Flange, DIN 5462 Pump Spline
• Lubrication: Pressure Lube or Wet Spline options
• Shaft Power: 37 HP at 500 RPM, 74 HP at 1000 RPM
• Markets: Fire and Rescue, Truck Cranes, Pumper Cleaner, Refuse
• Part Number: 281GGFJP-G5XR or 281GGFJPG5XR

Additional Information

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