The Chelsea 281 Series Power Take-Off assembly, part number 281GMFJP-K5RK or 281GMFJPK5RK, is a hydraulically shifted hot-shift PTO engineered for automatic transmissions with a 10-bolt aperture, commonly used on Allison and Caterpillar transmissions. This series carries a continuous torque rating of 390 lb-ft and offers nine speed ratios covering both low and high ranges. It is also cross-referenced as 5P1491 and 5P1482. The ductile iron bearing cap is 117% stronger than gray iron, and an 80% thicker clutch pack resists premature tooth wear. Rotatable cast-iron flanges reduce interference issues, and the SmartStart feature limits shock load at engagement. Call us to confirm proper fit for your specific transmission and application.
Features
Chelsea 281 Series hydraulic hot-shift PTO, 10-bolt aperture mount
Ductile iron bearing cap rated 117% stronger than gray iron
Enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear
Nine speed ratios including low and high speeds
O-ring sealing configuration between housing and bearing cap improves clamp load and reduces vibrational effects
Electronic Overspeed Control (EOC) protects driven equipment; Wet Spline Lubrication option provides 7 to 10 times greater shaft life
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic), hot-shift
- Compatible Transmission Manufacturer: Allison, Caterpillar
- Continuous Torque Rating: 390 lb-ft (529 Nm)
- Speed Ratios: Nine, including low and high speeds
- Output Types Available: 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. 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, DIN 100 flange
- Lubrication: Pressure lube (P) or Wet Spline (W) option
- Continuous Operation: Yes
- Cross-Reference: 5P1491, 5P1482
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
