The Chelsea 878XCFJW-M3RY or 878XCFJWM3RY is a constant mesh Power Take-Off assembly from Chelsea's 878 Series, engineered to mount on Allison and CAT 10-bolt transmissions. 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 stress from modern engine designs. The 878 Series delivers a single continuous-duty torque rating of 670 lb-ft across both intermittent and continuous applications. Rotatable cast-iron flanges reduce interference clearance issues, and the Wet Spline Lubrication option extends shaft life by 7 to 10 times compared to standard configurations. Nine speed ratios covering low and high ranges are available. A hose is included with the assembly. Pro Gear and Transmission carries this genuine Chelsea part. Call us to confirm proper fit for your specific transmission and application.
Features
Ductile iron bearing cap rated 117% stronger than gray iron for reduced vibrational damage
O-ring sealing configuration between housing and bearing cap improves clamp load and seal integrity
Single continuous-duty torque rating of 670 lb-ft for both intermittent and continuous operation
Rotatable cast-iron flanges reduce interference clearance issues at driveline outputs
Wet Spline Lubrication option extends output shaft life by 7 to 10 times
Nine speed ratios available, including low and high speeds; hose included with assembly
Tech Specs
- Shift Type: Constant Mesh
- Mounting Type: 10-Bolt (Allison and CAT transmissions)
- Continuous Torque: 670 lb-ft (908 Nm) - check application pages for actual rating
- Output Shaft Options: SAE B (7/8 in. - 13T) Pump Spline, SAE BB (1 in. - 15T) Pump Spline, SAE C (1-1/4 in. - 14T) Pump Spline, DIN 5462 Pump Spline, 1410 Series Companion Flange, DIN 120 Flange, DIN 100 Flange
- Output Flange Options: SAE B Pump Flange, SAE C Pump Flange
- Lubrication: Pressure Lube or Wet Spline options
- Speed Ratios: Nine ratios including low and high speeds
- Continuous Operation: Yes
Additional Information
Parts Manual: Chelsea 878 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
