The Chelsea 877 Series Power Take-Off, part number 877XAFJP-M5RZ or 877XAFJPM5RZ, is a 10-bolt, constant-mesh PTO engineered for Allison transmissions running high-torque, continuous-duty cycles. The output shaft is a 1-1/2" 10-tooth spline with a 1410 companion flange. Shaft power rates at 64 HP at 500 RPM and 128 HP at 1,000 RPM. Continuous torque reaches 670 lb-ft; intermittent torque is rated at 501+ lb-ft. The compact housing keeps installation height low to reduce clearance conflicts, and the output flange is rotatable to maximize clearance in tight installations. Pressure lubrication is integrated into the housing, and Wet Spline Technology helps extend both PTO and pump shaft service life. Call us to confirm proper fit for your application.
Features
10-bolt mounting for high-torque, continuous-duty Allison transmission applications
Constant-mesh shift type, suited for load-sense pump setups that remain engaged
1-1/2" 10-tooth spline output with 1410 companion flange
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Continuous torque up to 670 lb-ft; intermittent torque rated 501+ lb-ft
Rotatable output flange and compact housing height reduce installation clearance issues
Wet Spline Technology to extend PTO and pump shaft service life
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Constant Mesh
- Transmission Manufacturer: Allison
- Output Shaft Type: 1-1/2" 10-Tooth Spline with 1410 Companion Flange
- Output Power: 56+ HP, 51+ kW
- Shaft Power: 64 HP (500 RPM), 128 HP (1,000 RPM); 48 kW (500 RPM), 95 kW (1,000 RPM)
- Intermittent Torque: 501+ lb-ft, 501+ Nm
- Continuous Torque: 670 lb-ft, 908 Nm (verify actual rating on application pages)
- Lubrication: Pressure lube integrated into PTO housing; Wet Spline Technology included
Additional Information
The Chelsea 877 Series is designed for demanding work cycles including refuse trucks, aerial trucks, snow and ice equipment, fire and rescue, oil and gas, and defense vehicles. Eight internal gear ratios are available across the series to match a wide range of output speed requirements. Two assembly arrangements are offered to suit different installation orientations. The 877 Series supports continuous operation without de-rating. Parker Chelsea lists the 877 Series as an obsolete series; availability of this part number may be limited. Contact Pro Gear and Transmission to verify current availability and to confirm this unit fits your specific application.Parts Manual: Chelsea 877 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
