The Chelsea 878 Series Power Take-Off Assembly, part number 878XBFJW-M3RZ or 878XBFJWM3RZ, is a constant mesh PTO engineered for Allison 10-bolt transmissions. The 878 Series delivers up to 670 lb-ft of continuous torque, the highest torque rating Chelsea offers in this package size. A ductile iron bearing cap provides 117% greater strength compared to gray iron, while an O-ring sealing configuration between the housing and bearing cap improves clamp load and reduces the effects of engine vibration. Rotatable cast iron flanges minimize clearance and interference issues, and the Positive Stop driveline output design protects the oil seal from coupling damage. Nine speed ratios, covering both low and high ranges, are available within the series. Call us to confirm proper fit for your specific transmission application.
Features
Constant mesh design with cast iron housing for Allison 10-bolt transmission mounting
Ductile iron bearing cap rated 117% stronger than gray iron
O-ring sealing configuration between housing and bearing cap reduces vibration effects and improves clamp load
Positive Stop driveline output eliminates oil seal damage from coupling contact
Wet Spline Lubrication option extends shaft life by 7 to 10 times compared to standard lubrication
Nine speed ratios available, including low and high speeds; hose included
Tech Specs
- Transmission Mounting: Allison 10-Bolt
- Shift Type: Constant Mesh
- Continuous Torque: up to 670 lb-ft (908 Nm) - check application pages for actual rating
- Bearing Cap Material: Ductile Iron
- Housing Material: Cast Iron
- 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
- Continuous Operation: Yes
- Speed Ratios: Nine, including low and high
- Lubrication Options: Pressure Lube (P), Wet Spline (W)
Additional Information
Parts Manual: Chelsea 878 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
