The Chelsea 221 Series Power Take-Off, part number 221ZCAKP-M4AK or 221ZCAKPM4AK, is a 6-bolt mounted PTO designed for low-speed, heavy-duty applications including dump trucks, tow and recovery, and aerial equipment. It uses a wire/cable mechanical shift and delivers 46-55 HP (31-40 kW) of output power, with shaft power rated at 24 HP at 500 RPM and 48 HP at 1,000 RPM. The 1-1/4" round output shaft with keyway fits transmissions from Allison, Eaton/Fuller, Volvo/Mack, Hino, and others. A cast iron housing with tapered cone output bearings provides strong load-bearing capability, and greaseable pump shafts reduce spline fretting and corrosion. Both standard and low-profile housing configurations are available within the 221 Series. Call us to confirm proper fit for your transmission and application.
Features
6-Bolt mounting configuration
Wire/cable mechanical shift operation
1-1/4" round output shaft with keyway
Output power: 46-55 HP (31-40 kW); shaft power 24 HP at 500 RPM, 48 HP at 1,000 RPM
Intermittent torque rating: 201-300 lb-ft (check application pages for actual torque ratings)
Compatible with Allison, Eaton/Fuller, Volvo/Mack, Hino, and other transmission manufacturers
Greaseable pump shafts to reduce spline fretting and corrosion
Available in standard or low-profile housing
Tech Specs
- Intermittent Torque: 201-300 lb-ft / 301-400 Nm (check application pages for actual torque ratings)
- Shift Type: Wire/Cable, Mechanical
- Output Power: 46-55 HP / 31-40 kW
- Shaft Power: 24 HP at 500 RPM; 48 HP at 1,000 RPM (18 kW at 500 RPM; 36 kW at 1,000 RPM)
- Output Shaft Type: 1-1/4" Round with Key
- Mounting Type: 6-Bolt
- Transmission Compatibility: Allison, Eaton/Fuller, Volvo/Mack, Hino, Other
Additional Information
Parts Manual: Chelsea 221 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
