The Chelsea 877LFFJW-M5TF is a 877 Series Power Take-Off assembly designed for Allison transmission 10-bolt applications with high torque and continuous-duty requirements. This constant-mesh unit never needs to disengage, making it well suited for load-sense pump setups on refuse trucks, aerial platforms, snow and ice equipment, and fire and rescue vehicles. The 877 Series supports multiple output configurations including SAE B (7/8 in. - 13T), SAE BB (1 in. - 15T), and SAE C (1-1/4 in. - 14T) pump splines, as well as 1410 Series companion flange and driveline outputs. Pressure lubrication is integrated into the housing, with the required hose included in the assembly. Rotatable output flanges help maximize installation clearance. Part number 877LFFJW-M5TF or 877LFFJWM5TF. Available from Pro Gear and Transmission - call us to confirm proper fit for your application.
The 877 Series offers eight internal gear ratios, providing a wide range of output speeds to match hydraulic pump requirements. Two housing arrangements are available within the series to help address tight clearance situations. Wet Spline Technology is incorporated to extend service life on the PTO output shaft and the mating pump shaft.
Typical markets and applications for the 877 Series include refuse trucks, aerial work platforms, snow and ice control vehicles, fire and rescue pumpers, oil and gas service trucks, and defense vehicles.
Features
Chelsea 877 Series PTO Assembly, part number 877LFFJW-M5TF or 877LFFJWM5TF
Constant-mesh design for continuous-duty operation without disengagement
10-bolt mounting for Allison transmissions
Multiple output shaft options: SAE B (7/8 in. - 13T), SAE BB (1 in. - 15T), SAE C (1-1/4 in. - 14T) pump splines, and 1410 Series companion flange
Pressure lubrication integrated into PTO housing; supply hose included with assembly
Rotatable output flanges to maximize installation clearance in tight spaces
Suited for refuse, aerial, snow and ice, fire and rescue, and defense truck applications
Tech Specs
- Transmission Manufacturer: Allison
- Mounting Type: 10-Bolt
- Shift Type: Constant Mesh
- Continuous Operation: Yes
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- 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; DIN 5462 Pump Spline; DIN 100 and DIN 120 Flanges
- Continuous Torque Rating: 670 lb-ft / 908 Nm (see application pages for actual ratings)
- Intermittent Torque: 501+ lb-ft
- Shaft Power: 64 HP at 500 RPM; 128 HP at 1000 RPM
- Lubrication: Pressure lube integrated into housing (hose included)
- Wet Spline Technology: Yes
Additional Information
The Chelsea 877 Series is noted by Parker as an obsolete series, meaning it is no longer in current production. If you are sourcing 877LFFJW-M5TF as a replacement or service part, call Pro Gear and Transmission to verify availability and confirm the unit is correct for your specific installation before ordering.The 877 Series offers eight internal gear ratios, providing a wide range of output speeds to match hydraulic pump requirements. Two housing arrangements are available within the series to help address tight clearance situations. Wet Spline Technology is incorporated to extend service life on the PTO output shaft and the mating pump shaft.
Typical markets and applications for the 877 Series include refuse trucks, aerial work platforms, snow and ice control vehicles, fire and rescue pumpers, oil and gas service trucks, and defense vehicles.
Parts Manual: Chelsea 877 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
