The Chelsea 877LEFJW-M3TS or 877LEFJWM3TS is a 10-bolt, constant mesh Power Take-Off assembly designed for Allison transmissions. Part of the Chelsea 877 Series, this PTO is built for continuous-duty applications where disengagement is not required, making it a common choice for refuse trucks, aerial platforms, snow and ice equipment, and fire and rescue vehicles. The 877 Series carries a continuous torque rating of 670 lb-ft and delivers up to 128 HP at 1,000 RPM. Pressure lubrication is integrated into the housing, with a single hose connection for simplified installation. Wet Spline Technology is included to extend service life on the PTO and pump shaft. Call us to confirm proper fitment for your application.
Features
10-bolt mounting for Allison transmission applications
Constant mesh design supports continuous-duty operation without disengagement
Continuous torque rating up to 670 lb-ft; up to 128 HP at 1,000 RPM
Pressure lubrication integrated into the housing, single-hose installation
Wet Spline Technology extends PTO and pump shaft service life
Rotatable output flange options to maximize installation clearance
Tech Specs
- Output Type: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Mounting Type: 10-Bolt
- Transmission Manufacturer: Allison
- Shift Type: Constant Mesh
- Continuous Torque: 670 lb-ft
- Output Power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
- Lubrication: Pressure Lube with Wet Spline option
- Output Shaft Types: 1410 Series Companion Flange, SAE C 1-1/4 in. 14-tooth Pump Spline, SAE B 7/8 in. 13-tooth Pump Spline, SAE BB 1 in. 15-tooth Pump Spline, DIN 5462 Pump Spline, DIN 100 Flange, DIN 120 Flange
- Continuous Operation: Yes
- Series Status: Obsolete (Parker Chelsea 877 Series no longer in production)
Additional Information
The Chelsea 877 Series PTO was designed for demanding, high-torque applications on Allison-equipped trucks. Eight internal gear ratios provide a broad speed range to match a wide variety of hydraulic pump requirements. Two assembly arrangements are available to accommodate tight installation spaces. Common applications for this series include refuse trucks, snow and ice control vehicles, aerial equipment, oil and gas service units, and fire and rescue pumper trucks. The 877 Series is classified as obsolete by Parker Chelsea, meaning it is no longer in current production. Part number 877LEFJW-M3TS is also referenced as SP877LEFJW-M3TS. Contact Pro Gear and Transmission to confirm availability and verify fitment for your specific truck and transmission configuration.Parts Manual: Chelsea 877 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
