The Chelsea 878XAFJW-M5RF or 878XAFJWM5RF is a constant mesh Power Take-Off assembly from the Chelsea 878 Series, designed to mount on Allison and CAT 10-bolt transmissions. The 878 Series represents a direct improvement over the 877 Series design, featuring a ductile iron bearing cap that is 117% stronger than gray iron, an O-ring sealing configuration between the housing and bearing cap to improve clamp load and reduce vibration-related damage, and steel clutch disc thickness increased by 80%. The series delivers up to 670 lb-ft continuous torque and offers nine speed ratios covering both low and high speed ranges. Rotatable, cast-iron flanges reduce interference clearance issues, and a Wet Spline Lubrication option extends shaft service life by 7 to 10 times compared to standard configurations. A hydraulic hose is included. Call us to confirm proper fit for your application.
The Chelsea 878 Series PTO is used across a range of demanding vocational applications including snow and ice control, vacuum trucks, aerial equipment, and refuse vehicles. The 878 Series is documented in the Parker Chelsea 267/281/288/871/878 Series Owner's Manual and the 878 Series Parts List (HY25-2871-M1/US). Cross-reference: also listed as SP878XAFJW-M5RF.
Features
Ductile iron bearing cap is 117% stronger than gray iron, reducing vibration-related wear
O-ring sealing configuration between housing and bearing cap improves clamp load and resists vibrational effects
Single continuous duty torque rating up to 670 lb-ft for the 878 Series
Nine speed ratios available, including low and high speed options
Rotatable cast-iron flanges reduce interference and clearance issues at the output
Wet Spline Lubrication option extends output shaft life 7 to 10 times; hydraulic hose included
Tech Specs
- Transmission Mounting: Allison and CAT 10-Bolt
- Shift Type: Constant Mesh
- Continuous Torque (Series): 670 lb-ft / 908 Nm (verify actual rating on application pages)
- Speed Ratios: Nine ratios, including low and high speeds
- Output Shaft Options (Series): SAE B (7/8 in. - 13T) Pump Spline, SAE BB (1 in. - 15T) Pump Spline, SAE C (1-1/4 in. - 14T) Pump Spline
- Output Flange Options (Series): SAE B Pump Flange, SAE C Pump Flange, 1410 Series Companion Flange
- Lubrication: Pressure Lube (P) and Wet Spline (W) options
- Continuous Operation: Yes
Additional Information
The Chelsea 878 Series PTO is used across a range of demanding vocational applications including snow and ice control, vacuum trucks, aerial equipment, and refuse vehicles. The 878 Series is documented in the Parker Chelsea 267/281/288/871/878 Series Owner's Manual and the 878 Series Parts List (HY25-2871-M1/US). Cross-reference: also listed as SP878XAFJW-M5RF.
Parts Manual: Chelsea 878 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
