Features
6-bolt mounting type compatible with Allison, Eaton/Fuller, Volvo/Mack, Hino, and other transmissions
Wire/cable mechanical shift operation
1-1/4" round output shaft with keyway
Intermittent torque rating up to 250 lb-ft (339 Nm) - verify on application pages for your specific unit
Output power 46-55 HP (31-40 kW); shaft power 24 HP at 500 RPM, 48 HP at 1000 RPM
Greaseable pump shafts to reduce spline fretting and corrosion; available in standard or low-profile housing
Tech Specs
- Intermittent Torque: 250 lb-ft / 339 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 (500 RPM), 48 HP (1000 RPM) / 18 kW (500 RPM), 36 kW (1000 RPM)
- Output Shaft Type: 1-1/4" Round with Key
- Mounting Type: 6-Bolt
- Compatible Transmissions: Allison, Eaton/Fuller, Volvo/Mack, Hino, Other
- Housing: Standard or Low-Profile
Additional Information
Parts Manual: Chelsea 221 Series PTO Parts Manual (PDF) - exploded views, item numbers and the full parts breakdown for this series.
The 221 Series is built around a cast iron housing with tapered cone bearings on the output shaft for strong load-bearing capability under sustained heavy-duty cycles. Twenty-six output options and three internal speed ratios make this a versatile platform across aerial, vocational, municipal, and tow/recovery applications. The 360-degree rotatable flange and self-lube option - useful on transmissions that have difficulty delivering lubrication to the PTO - add to its adaptability. The low-profile housing variant is available where under-truck clearance is limited.
