The Chelsea 660ZFDAX-A5XD is a 660 Series Power Take-Off assembly designed for medium to heavy duty trucks using 6-bolt manual transmissions from Eaton/Fuller, Volvo/Mack, Hino, and other manufacturers. It uses a wire/cable mechanical shift and delivers up to 375 lb-ft intermittent torque with output power exceeding 56 HP. The 1-1/4" round output shaft with keyway connects to a wide range of hydraulic and driveline setups. Shaft power output runs 36 HP at 500 RPM, 71 HP at 1000 RPM, and 107 HP at 1500 RPM. Cast iron bearing caps and one-piece gears contribute to the series' durability in demanding vocational applications including dump trucks, aerial devices, and service trucks. Also referenced as 660ZFDAXA5XD. Call us to confirm proper fit for your application.

The Chelsea 660 Series fits vocational applications including dump trucks, aerial devices, service trucks, and snow and ice removal equipment. Four internal speed ratios and ten shift options are available across the 660 Series, with twenty-six output configurations including a 360-degree rotatable flange option for optimal pump fitment. Tapered cone bearings on the output shaft and tapered bearings on the input shaft provide greater load-bearing capability compared to needle-bearing designs. The 660 Series is suited for applications requiring higher torque than the Chelsea 442 Series.
Features
6-bolt mounting fits most popular manual transmissions including Eaton/Fuller, Volvo/Mack, Hino, and other manufacturers
Wire/cable mechanical shift type
Intermittent torque capacity up to 375 lb-ft (508 Nm) - check application pages for actual torque ratings
1-1/4" round output shaft with keyway
One-piece gears for higher torque capacity
Cast iron bearing caps with greaseable shaft options
Tech Specs
- Intermittent Torque: 375 lb-ft / 508 Nm (check application pages for actual torque ratings)
- Shift Type: Wire/Cable, Mechanical
- Mounting Type: 6-Bolt
- Output Shaft Type: 1-1/4" Round with key
- Output Power: 56+ HP / 51+ kW
- Shaft Power: 36 HP (500 RPM), 71 HP (1000 RPM), 107 HP (1500 RPM) / 27 kW (500 RPM), 53 kW (1000 RPM), 80 kW (1500 RPM)
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, Hino, Other 6-bolt manual transmissions
- Continuous Operation: Yes, with 30% de-rating
Additional Information

The Chelsea 660 Series fits vocational applications including dump trucks, aerial devices, service trucks, and snow and ice removal equipment. Four internal speed ratios and ten shift options are available across the 660 Series, with twenty-six output configurations including a 360-degree rotatable flange option for optimal pump fitment. Tapered cone bearings on the output shaft and tapered bearings on the input shaft provide greater load-bearing capability compared to needle-bearing designs. The 660 Series is suited for applications requiring higher torque than the Chelsea 442 Series.
