The Chelsea 878XAFJP-M3AB is a constant mesh Power Take-Off from the 878 Series, designed to mount on Allison and CAT 10-bolt transmissions. The 878 Series delivers up to 670 lb-ft of torque in both intermittent and continuous duty applications, packaging that capability into one of the smallest envelopes available for this torque class. The cast iron housing and ductile iron bearing cap, which is 117% stronger than gray iron, handle the vibrational demands of modern engine designs. Output shaft options across the 878 Series include SAE B, SAE BB, and SAE C pump splines as well as companion flange configurations. The 878XAFJP-M3AB is sold by Pro Gear and Transmission.
Features
Constant mesh design with cast iron housing for continuous duty operation
Ductile iron bearing cap rated 117% stronger than gray iron predecessor
Up to 670 lb-ft torque rating across both intermittent and continuous use
O-ring sealing between housing and bearing cap to improve clamp load and reduce vibrational effects
Steel clutch disc pack thickness increased 80% over prior generation
Wet spline lubrication option extends shaft life 7 to 10 times compared to dry spline
Tech Specs
- Series: Chelsea 878 Series
- Shift Type: Constant Mesh
- Mounting Type: 10-Bolt (Allison and CAT transmissions)
- Continuous Torque: up to 670 lb-ft (908 Nm) - check application pages for actual torque rating
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 64 HP at 500 RPM, 128 HP at 1000 RPM
- Continuous Operation: Yes
- Available Output Shaft Types (series): SAE B 7/8"-13T Pump Spline, SAE BB 1"-15T Pump Spline, SAE C 1-1/4"-14T Pump Spline, DIN 5462 Pump Spline, 1410 Series Companion Flange, DIN 120 Flange, DIN 100 Flange
- Available Output Flange Types (series): SAE B Pump Flange, SAE C Pump Flange
- Speed Ratios: Nine available (including low and high speeds)
Additional Information
The 878 Series is an evolution of the Chelsea 877 Series PTO, incorporating structural and sealing upgrades to address vibrational loads from current and future engine designs. Rotatable cast iron flanges reduce interference fit issues during installation. Hose is included with the unit. Common market applications for the 878 Series include snow and ice control, vacuum, aerial, and refuse equipment. Also referenced as SP878XAFJP-M3AB. Parker Chelsea documentation includes the 878 Series Parts List (HY25-2871-M1/US) and the 267/281/288/871/878 Series Owner's Manual.Parts Manual: Chelsea 878 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
