The Chelsea 660XSAHX-V3AF is a 6-bolt Power Take-Off assembly from the Chelsea 660 Series, engineered for medium- to heavy-duty vocational applications including dump trucks, aerial devices, service trucks, and snow and ice removal equipment. This unit uses a wire/cable mechanical shift and delivers an intermittent torque rating up to 375 lb-ft (508 Nm) -- check application pages for actual torque ratings for your specific installation. The 1-1/4" round output shaft accommodates a 5/16" key. Compatible transmissions span Eaton/Fuller, Volvo/Mack, Hino, and other 6-bolt manual transmissions. Shaft power output reaches 36 HP at 500 RPM, 71 HP at 1,000 RPM, and 107 HP at 1,500 RPM. Call us to confirm proper fit for your transmission and application.

The Chelsea 660 Series is suited for demanding vocational markets including aerial, construction, municipal, and other mobile equipment. With four internal speed ratios, ten shift options, and twenty-six output configurations including a 360-degree rotatable flange, the 660 Series offers significant versatility across pump and driveline installations. Tapered cone bearings on both the input and output shafts provide greater load-bearing capability compared to needle-bearing designs. This PTO is a step up in torque capacity from the Chelsea 442 Series, making it a practical choice when application demands exceed that series' rating. Part number 660XSAHX-V3AF is also referenced as SP660XSAHX-V3AF in some catalog systems.
Features
6-bolt mounting for compatibility with Eaton/Fuller, Volvo/Mack, Hino, and other popular manual transmissions
Wire/cable mechanical shift mechanism
Intermittent torque rating up to 375 lb-ft (508 Nm) - verify actual rating on application pages
1-1/4" round output shaft with 5/16" key
One-piece gears for higher torque capacity
Cast iron bearing caps and greaseable shaft options for extended service life
Tech Specs
- Intermittent Torque: Up to 375 lb-ft (508 Nm) - check application pages for actual torque rating
- Shift Type: Wire/Cable, Mechanical
- Mounting Type: 6-Bolt
- Output Shaft Type: 1-1/4" Round with 5/16" key
- Compatible Transmissions: Eaton/Fuller, Volvo/Mack, Hino, and other 6-bolt manual transmissions
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 36 HP (27 kW) at 500 RPM, 71 HP (53 kW) at 1,000 RPM, 107 HP (80 kW) at 1,500 RPM
- Continuous Operation: Yes, with 30% de-rating
Additional Information

The Chelsea 660 Series is suited for demanding vocational markets including aerial, construction, municipal, and other mobile equipment. With four internal speed ratios, ten shift options, and twenty-six output configurations including a 360-degree rotatable flange, the 660 Series offers significant versatility across pump and driveline installations. Tapered cone bearings on both the input and output shafts provide greater load-bearing capability compared to needle-bearing designs. This PTO is a step up in torque capacity from the Chelsea 442 Series, making it a practical choice when application demands exceed that series' rating. Part number 660XSAHX-V3AF is also referenced as SP660XSAHX-V3AF in some catalog systems.
