The Chelsea 877LEFJW-M5TS or 877LEFJWM5TS is a 877 Series Power Take-Off assembly built for 10-bolt Allison transmission applications. This constant mesh PTO is designed for continuous-duty operation, eliminating the need to de-rate for sustained use. The 877 Series supports intermittent torque demands above 501 lb-ft, with continuous torque rated up to 670 lb-ft, and shaft power of 64 HP at 500 RPM or 128 HP at 1,000 RPM. Output options in the series include SAE B, SAE C, and ISO 7652 pump flanges as well as driveline configurations. Pressure lubrication is integrated directly into the PTO housing. The 877 Series serves aerial, refuse, snow and ice, fire and rescue, and defense truck applications. Call us to confirm proper fit for your specific transmission and installation.
Features
10-bolt mounting configuration for Allison transmissions
Constant mesh design supports continuous-duty operation without de-rating
Continuous torque rating up to 670 lb-ft; intermittent torque above 501 lb-ft
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Pressure lubrication integrated into the PTO housing
Rotatable output flange options available within the 877 Series
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 (908 Nm)
- Intermittent Torque: 501+ lb-ft
- Shaft Power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
- Output Shaft Options: 1-1/4 in. 14-tooth SAE C Pump Spline, 7/8 in. 13-tooth SAE B Pump Spline, 1 in. 15-tooth SAE BB Pump Spline, 1410 Series Companion Flange
- Lubrication: Pressure lube integrated into housing
- Continuous Operation: Yes
Additional Information
The Chelsea 877 Series is noted by Parker as a legacy series. Buyers sourcing 877LEFJW-M5TS for an existing installation should call Pro Gear and Transmission to confirm current availability and any applicable transition or replacement part guidance before ordering.Parts Manual: Chelsea 877 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
