The Chelsea 878 Series Power Take-Off Assembly, part number 878XKFJW-M5RS or 878XKFJWM5RS, is a constant mesh PTO designed for Allison and CAT 10-bolt transmissions. Building on the proven 877 Series platform, the 878 Series adds 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 steel clutch disc thickness increased by 80% to combat the vibrational forces of modern engine designs. The series delivers up to 670 lb-ft of torque in both intermittent and continuous duty applications. Nine speed ratios cover low and high speed requirements. Rotatable cast-iron flanges reduce interference clearance issues, and a Wet Spline Lubrication option extends shaft life by 7 to 10 times. Typical markets include snow and ice, vacuum, aerial, and refuse applications. Call us to confirm proper fit for your specific transmission and application.
Features
Ductile iron bearing cap is 117% stronger than gray iron predecessor
O-ring sealing configuration between housing and bearing cap improves clamp load and reduces vibrational damage
Steel clutch disc thickness increased 80% over prior 877 Series design
Nine speed ratios including low and high speed ranges
Rotatable cast-iron flanges reduce driveline interference clearance issues
Wet Spline Lubrication option extends shaft life 7 to 10 times; hose included, no separate order needed
Tech Specs
- Transmission Compatibility: Allison and CAT 10-bolt
- Mounting Type: 10-bolt
- Shift Type: Constant mesh
- Continuous Duty Torque: up to 670 lb-ft (908 Nm) - check application pages for actual torque ratings
- 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
- Speed Ratios: Nine (low and high included)
- Lubrication Options: Pressure lube (P), Wet spline (W)
- Continuous Operation: Yes
- Typical Markets: Snow and ice, vacuum, aerial, refuse
Additional Information
Parts Manual: Chelsea 878 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
