The Chelsea 878XAFJP-M3XV or 878XAFJPM3XV is a constant mesh Power Take-Off assembly from the 878 Series, designed to mount on Allison and CAT 10-bolt transmissions. Built around a cast iron housing with a ductile iron bearing cap rated 117% stronger than gray iron, this PTO handles continuous-duty torque demands. An o-ring sealing configuration between the housing and bearing cap reduces vibrational effects and improves clamp load. Nine speed ratios covering both low and high ranges give operators broad flexibility across applications including snow and ice, vacuum, aerial, and refuse trucks. Rotatable cast iron flanges reduce interference clearance issues, and the Wet Spline Lubrication option extends shaft life 7 to 10 times. A hydraulic hose is included. Call us to confirm proper fit for your specific transmission configuration.
The 878 Series is Chelsea's evolution of the proven 877 Series PTO platform. Improvements include an 80% increase in steel disc thickness within the clutch pack, a ductile iron bearing cap replacing the previous gray iron cap, and an upgraded o-ring seal at the housing-to-bearing-cap interface. These changes directly address vibrational stress associated with modern engine designs. The 878 Series is applied across snow and ice control, vacuum trucks, aerial equipment, and refuse vehicles. Parker Chelsea reference documents include the 267/281/288/871/878 Series Owner's Manual and the 878 Series Parts List (HY25-2871-M1/US).
Features
Ductile iron bearing cap - 117% stronger than gray iron for reduced vibrational damage
Constant mesh design with cast iron housing fits Allison and CAT 10-bolt transmissions
O-ring sealing configuration between housing and bearing cap improves clamp load and reduces vibrational effects
Nine speed ratios including low and high speed ranges
Rotatable cast iron flanges reduce interference clearance issues at driveline outputs with positive-stop design that eliminates oil seal damage
Wet Spline Lubrication option provides 7 to 10 times greater shaft life; hydraulic hose included
Tech Specs
- Shift Type: Constant Mesh
- Mounting Type: 10-Bolt (Allison and CAT transmissions)
- Continuous Torque: 670 lb-ft (908 Nm) - check application pages for actual torque rating for this configuration
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 64 HP at 500 RPM, 128 HP at 1000 RPM
- Speed Ratios: Nine ratios (low and high speeds included)
- Lubricant Options: Pressure Lube (P), 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, 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
- Hose: Included
Additional Information
The 878 Series is Chelsea's evolution of the proven 877 Series PTO platform. Improvements include an 80% increase in steel disc thickness within the clutch pack, a ductile iron bearing cap replacing the previous gray iron cap, and an upgraded o-ring seal at the housing-to-bearing-cap interface. These changes directly address vibrational stress associated with modern engine designs. The 878 Series is applied across snow and ice control, vacuum trucks, aerial equipment, and refuse vehicles. Parker Chelsea reference documents include the 267/281/288/871/878 Series Owner's Manual and the 878 Series Parts List (HY25-2871-M1/US).
Parts Manual: Chelsea 878 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
