878XAFJP-M3RY Chelsea PTO Assembly

The Chelsea 878 Series Power Take-Off Assembly, part number 878XAFJP-M3RY or 878XAFJPM3RY, is a constant mesh PTO engineered for Allison and CAT 10-bolt transmissions. The 878 Series delivers up to 670 lb-ft continuous torque in a compact package, making it the highest torque-to-size option in its class. Key design improvements over the predecessor 877 Series include a ductile iron bearing cap rated 117% stronger than gray iron and an O-ring sealing configuration between the housing and bearing cap to reduce the vibrational effects of modern engine designs. Steel disc thickness within the clutch pack has been increased by 80%. Nine speed ratios cover both low and high speed applications, and rotatable cast iron flanges reduce clearance and interference issues. This unit is suited for snow and ice, vacuum, aerial, and refuse applications. Call us to confirm proper fit for your specific transmission and application.

Features

Fits Allison and CAT 10-bolt transmissions - constant mesh design
Ductile iron bearing cap - 117% stronger than gray iron
O-ring sealing configuration between housing and bearing cap improves clamp load and resists vibrational effects
Clutch pack steel disc thickness increased 80% over the 877 Series predecessor
Nine speed ratios including low and high speeds
Rotatable cast iron flanges reduce clearance and interference issues
Wet Spline Lubrication option provides 7 to 10 times greater output shaft life
Positive stop on driveline outputs eliminates oil seal damage from coupling
Hose included - no separate order required

Tech Specs

• Transmission Mounting: Allison and CAT 10-Bolt
• Shift Type: Constant Mesh
• Continuous Torque Rating: 670 lb-ft (908 Nm)
• 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
• Lubrication: Pressure Lube (P) or Wet Spline (W) options
• Typical Markets: Snow and Ice, Vacuum, Aerial, Refuse

Additional Information

Parts manual and diagrams: Chelsea 878 Series PTO parts list with prices