The Chelsea 877LEFJW-M5TY or 877LEFJWM5TY is a 877 Series Power Take-Off assembly designed for Allison transmissions with a 10-bolt mounting configuration. The 877 Series operates on a constant mesh design, making it suited for applications that run continuously without disengagement, such as load-sense pump setups. Output flange options within the series include SAE B (7/8 in., 13-tooth), SAE BB (1 in., 15-tooth), and SAE C (1-1/4 in., 14-tooth) pump splines, as well as 1410 Series companion flange and ISO 7652 pump flange configurations. The series supports continuous operation and carries a series intermittent torque rating above 501 lb-ft, with pressure lubrication integrated into the PTO housing. Typical applications include refuse trucks, aerial equipment, snow and ice vehicles, fire and rescue, and defense trucks. Call us to confirm proper fitment for your specific transmission and installation.
Features
Chelsea 877 Series Power Take-Off assembly, part 877LEFJW-M5TY
Constant mesh design for continuous operation without disengagement
10-bolt mounting for Allison transmissions
Series intermittent torque rating exceeds 501 lb-ft
Pressure lubrication integrated into housing, simplifying installation
Rotatable output flange options to maximize installation clearance
Tech Specs
- Mounting Type: 10-Bolt
- Transmission Manufacturer: Allison
- Shift Type: Constant Mesh
- Continuous Operation: Yes
- Series Intermittent Torque: 501+ lb-ft / 501+ Nm
- Output Shaft Options: SAE B (7/8 in. - 13T), SAE BB (1 in. - 15T), SAE C (1-1/4 in. - 14T) pump splines; 1410 Series companion flange; ISO 7652 pump flange
- Lubrication: Pressure lube (integrated into housing)
- Series Output Power: 56+ HP / 51+ kW
- Dimensions (H x W x L): 13 in. x 11 in. x 38 in.
Additional Information
The Chelsea 877 Series is rated for demanding, high-torque continuous-duty cycles and is noted for use on refuse trucks, aerial equipment, snow and ice control vehicles, fire and rescue trucks, pumper cleaners, oil and gas equipment, and defense vehicles. Two assembly arrangements are available within the series to maximize installation clearance. Wet Spline Technology is offered on direct-mount pump flange configurations to extend PTO and pump shaft service life. Eight internal gear ratios are available within the series to match a wide range of output speed requirements. This series is listed as obsolete by Parker Chelsea; Pro Gear and Transmission can help you confirm availability or identify a suitable current replacement. Call us with your transmission model and application details.Parts Manual: Chelsea 877 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
