The Chelsea 877 Series Power Take-Off, part number 877XEQTP-M5XV or 877XEQTPM5XV, is a 10-bolt constant mesh PTO designed for Allison transmission applications with high torque and demanding duty cycles. The output shaft is a 1-1/2" 10-spline with a 1410 series companion flange. Continuous torque rating reaches 670 lb-ft (908 Nm) - confirm actual rating against application pages for your specific installation. Shaft power is 64 HP at 500 RPM and 128 HP at 1000 RPM. Compact housing reduces installation clearance issues, and the rotatable output flange offers additional flexibility during mounting. Wet Spline Technology is integrated to extend service life of both the PTO and the driven pump shaft. This is a genuine Chelsea part, sold by Pro Gear and Transmission. Call us to confirm proper fit for your application.
Features
10-bolt mounting for Allison transmission applications
Constant mesh shift type - suited for continuous-duty use with load-sense pumps
Output: 1-1/2" 10-spline shaft with 1410 series companion flange
Continuous torque up to 670 lb-ft (908 Nm) - verify against application pages for actual rating
Shaft power: 64 HP at 500 RPM, 128 HP at 1000 RPM
Compact housing height reduces clearance issues; rotatable output flange maximizes installation flexibility
Wet Spline Technology to extend PTO and pump shaft service life
Tech Specs
- Mounting Type: 10-Bolt
- Transmission Manufacturer: Allison
- Shift Type: Constant Mesh
- Output Shaft Type: 1-1/2" 10-Spline with 1410 Series Companion Flange
- Intermittent Torque: 501+ lb-ft / 501+ Nm
- Continuous Torque: 670 lb-ft / 908 Nm (check application pages for actual torque ratings)
- Output Power: 56+ HP / 51+ kW
- Shaft Power: 64 HP at 500 RPM, 128 HP at 1000 RPM / 48 kW at 500 RPM, 95 kW at 1000 RPM
Additional Information
The Chelsea 877 Series is designed for applications that require continuous operation without de-rating - common in refuse trucks, aerial units, snow and ice equipment, and fire and rescue vehicles. The series features pressure lubrication integrated into the PTO housing, with a single hose connection for simplified installation. Eight internal gear ratios provide a wide range of output speeds to match hydraulic system requirements. Two assembly arrangements are available to address tight installation envelopes. This series is listed as obsolete by Parker Chelsea; contact Pro Gear and Transmission to confirm current availability and to discuss any applicable replacement options.Parts Manual: Chelsea 877 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
