281GCFJP-D5RK Chelsea PTO Assembly

The Chelsea 281 Series Power Take-Off, part number 281GCFJP-D5RK or 281GCFJPD5RK, is a hydraulically shifted hot-shift PTO engineered for automatic transmissions with a 10-bolt aperture, commonly used with Allison and Caterpillar transmissions. It delivers nine speed ratios spanning low and high ranges, with a single continuous duty torque rating up to 390 lb-ft. The 281 Series evolved directly from the 280 Series, adding a ductile iron bearing cap rated 117% stronger than gray iron, an o-ring sealing configuration between the housing and bearing cap for better clamp load, and an 80% thicker clutch pack to resist premature tooth wear. Rotatable cast-iron flanges reduce interference clearance issues, and the wet spline lubrication option provides 7 to 10 times greater shaft life. SmartStart reduces shock load at engagement, and Electronic Overspeed Control (EOC) protects driven equipment. Common markets include fire and rescue, truck cranes, pumper cleaners, and refuse trucks. Cross-references: 5P1491, 5P1495. Call us to confirm proper fit for your application.

Features

Hydraulic PowerShift (hot-shift) operation for 10-bolt automatic transmission apertures, commonly Allison and Caterpillar
Ductile iron bearing cap rated 117% stronger than gray iron for improved durability
O-ring sealing configuration between housing and bearing cap reduces vibrational effects and improves clamp load
Enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear
Nine speed ratios including low and high speeds; single continuous duty torque rating up to 390 lb-ft
SmartStart reduces engagement shock load; Electronic Overspeed Control (EOC) protects driven equipment
Wet spline lubrication option provides 7 to 10 times greater shaft life; hose included

Tech Specs

• Mounting Type: 10-Bolt aperture (Allison / Caterpillar automatic transmissions)
• Shift Type: PowerShift (Hydraulic hot-shift)
• Continuous Torque: 390 lb-ft (529 Nm) - verify actual rating on application pages
• 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: SmartStart Round Shaft (1-1/4 in. with 5/16 in. key), 3/4 in. 11T Pump Spline, SAE B 7/8 in. 13T Pump Spline, SAE C 1-1/4 in. 14T Pump Spline, DIN 5462 Pump Spline, 1410 Companion Flange, DIN 120 Flange, DIN 100 Flange
• Lubricant Options: Pressure Lube (P), Wet Spline (W)
• Cross-References: 5P1491, 5P1495
• Part Number: 281GCFJP-D5RK or 281GCFJPD5RK

Additional Information

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