The Chelsea 878 Series Power Take-Off Assembly, part number 878XDFJP-M3RY or 878XDFJPM3RY, is a constant mesh PTO engineered to mount on Allison 10-bolt transmissions. The 878 Series is an advancement on the proven 877 Series design, incorporating a ductile iron bearing cap rated 117% stronger than gray iron, an O-ring sealing configuration between the housing and bearing cap to improve clamp load and reduce vibrational damage, and an 80% increase in steel disc thickness within the clutch pack. Nine speed ratios cover both low and high speed applications. Rotatable cast-iron flanges reduce clearance and interference issues, while the Positive Stop feature on driveline outputs eliminates oil seal damage from coupling. A hose is included with the assembly. Call us to confirm proper fit for your transmission and application.
Features
Constant mesh design with cast iron housing fits Allison 10-bolt transmissions
Ductile iron bearing cap is 117% stronger than gray iron for increased durability
O-ring sealing configuration between housing and bearing cap reduces vibration effects and improves clamp load
Nine speed ratios including low and high speed ranges
Rotatable cast-iron flanges reduce clearance and interference issues
Wet Spline Lubrication option extends shaft life 7 to 10 times over standard lubrication
Positive Stop driveline output eliminates oil seal damage from coupling
Hose included, no separate order required
Tech Specs
- Shift Type: Constant Mesh
- Mounting Type: 10-Bolt
- Transmission Manufacturer: Allison
- Continuous Torque: 670 lb-ft (908 Nm) - check application pages for actual torque rating
- Speed Ratios: Nine (includes low and high)
- Lubrication: Pressure Lube or Wet Spline options
- 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
Additional Information
Parts Manual: Chelsea 878 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
