The Chelsea 878 Series Power Take-Off Assembly, part number 878XBFJP-M5AB or 878XBFJPM5AB, is a constant mesh PTO engineered to fit Allison and CAT 10-bolt transmissions. The 878 Series advances on the proven 877 Series platform with a ductile iron bearing cap rated 117% stronger than gray iron, an o-ring sealing configuration between the housing and bearing cap for improved clamp load, and steel clutch disc thickness increased by 80% to address vibration from modern engine designs. Nine speed ratios cover both low and high speed applications. The Wet Spline Lubrication option extends shaft service life by 7 to 10 times compared to standard configurations. Rotatable cast-iron flanges reduce clearance and interference issues, and driveline outputs include a positive stop that eliminates oil seal damage from coupling contact. Call us to confirm proper fit for your application.
Features
Ductile iron bearing cap - 117% stronger than gray iron, addressing vibration from modern engine designs
O-ring sealing configuration between housing and bearing cap improves clamp load and reduces vibrational effects
Steel clutch disc thickness increased 80% over the predecessor 877 Series design
Nine speed ratios including low and high speeds
Wet Spline Lubrication option provides 7 to 10 times greater shaft life
Rotatable cast-iron flanges reduce clearance and interference issues; positive stop on driveline outputs eliminates oil seal damage
Hose included - no need to order separately
Tech Specs
- Transmission Fitment: Allison and CAT 10-bolt
- Shift Type: Constant Mesh
- Housing Material: Cast iron
- Bearing Cap Material: Ductile iron
- Speed Ratios: Nine (includes low and high speeds)
- Continuous Operation: Yes
- Lubrication Options: Pressure lube (P) or Wet Spline (W)
- 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
- Output Flange Options: SAE B pump flange, SAE C pump flange, 1410 Series companion flange
- Mounting: 10-bolt
Additional Information
Parts Manual: Chelsea 878 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
