The Chelsea 660 Series Power Take-Off Assembly, part number 660XQAHX-A5XK or 660XQAHXA5XK, is a 6-bolt, mechanically shifted PTO built for medium- to heavy-duty vocational applications. It uses a wire/cable mechanical shift mechanism and delivers up to 375 lb-ft intermittent torque (508 Nm) with output power exceeding 56 HP. Shaft power ratings are 36 HP at 500 RPM, 71 HP at 1,000 RPM, and 107 HP at 1,500 RPM. The output shaft is a 1-1/4" round, available with keyway. Compatible transmissions include Eaton/Fuller, Volvo/Mack, Hino, and other 6-bolt housings. One-piece gears, cast iron bearing caps, and tapered cone bearings on the output shaft contribute to its load rating and service life. Call us to confirm proper fit for your application.
The 660 Series is suited for aerial devices, dump trucks, service trucks, snow and ice removal equipment, and blower and product pump applications. The series offers four internal speed ratios and multiple output configurations. Tapered cone bearings on the output shaft and tapered bearings on the input shaft provide greater load-bearing capability compared to needle-bearing designs.
Features
6-bolt mounting compatible with Eaton/Fuller, Volvo/Mack, Hino, and other popular manual transmissions
Wire/cable mechanical shift type
Up to 375 lb-ft (508 Nm) intermittent torque capacity
Shaft power: 36 HP at 500 RPM, 71 HP at 1,000 RPM, 107 HP at 1,500 RPM
One-piece gears and cast iron bearing caps for increased torque handling
Greaseable shaft options; 1-1/4" round output shaft with keyway
Tech Specs
- Intermittent Torque: 375 lb-ft / 508 Nm (check application pages for actual torque ratings)
- Shift Type: Wire/Cable, Mechanical
- Output Power: 56+ HP / 51+ kW
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, Hino, Other 6-bolt
- Output Shaft Type: 1-1/4" Round; 1-1/4" Round with key
- Mounting Type: 6-Bolt
- Shaft Power: 36 HP / 27 kW (500 RPM), 71 HP / 53 kW (1,000 RPM), 107 HP / 80 kW (1,500 RPM)
- Continuous Operation: Yes, with 30% de-rating
Additional Information
The 660 Series is suited for aerial devices, dump trucks, service trucks, snow and ice removal equipment, and blower and product pump applications. The series offers four internal speed ratios and multiple output configurations. Tapered cone bearings on the output shaft and tapered bearings on the input shaft provide greater load-bearing capability compared to needle-bearing designs.
