878XAFJW-M3RY Chelsea PTO Assembly

The Chelsea 878 Series Power Take-Off Assembly, part number 878XAFJW-M3RY or 878XAFJWM3RY, is a constant-mesh PTO engineered for Allison and CAT 10-bolt transmissions. The 878 Series represents an evolution of the proven 877 Series design, with a ductile iron bearing cap rated 117% stronger than gray iron and an o-ring sealing configuration between the housing and bearing cap to improve clamp load and reduce vibrational stress from modern engine designs. The steel discs within the clutch pack have been increased in thickness by 80%. The unit offers nine speed ratios covering low and high ranges, rotatable cast-iron flanges for reduced interference clearance issues, and a wet spline lubrication option that extends shaft life by 7 to 10 times. A hose is included. Common markets include refuse, vacuum, aerial, and snow and ice applications. Call us to confirm proper fit for your specific transmission and application.

Features

Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring sealing configuration between housing and bearing cap reduces vibrational effects and improves clamp load
Clutch pack steel disc thickness increased 80% over the 877 Series design
Nine speed ratios including low and high speeds
Rotatable cast-iron flanges reduce interference clearance issues; positive stop on driveline outputs eliminates oil seal damage
Wet spline lubrication option extends shaft life 7 to 10 times; hose included

Tech Specs

• Series: Chelsea 878 Series Power Take-Off
• Shift Type: Constant Mesh
• Mounting Type: 10-Bolt
• Transmission Compatibility: Allison and CAT 10-bolt transmissions
• Continuous Torque Rating: 670 lb-ft (908 Nm) - check application pages for actual torque rating for this configuration
• Output Shaft Options (series): SAE B 7/8 in. 13-tooth pump spline, SAE BB 1 in. 15-tooth pump spline, SAE C 1-1/4 in. 14-tooth pump spline, DIN 5462 pump spline, 1410 Series companion flange, DIN 120 flange, DIN 100 flange
• Continuous Operation: Yes
• Lubricant Options: Pressure lube, wet spline
• Bearing Cap Material: Ductile iron
• Housing Material: Cast iron
• Hose: Included

Additional Information

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