The Chelsea 660 Series Power Take-Off Assembly, part number 660ZSDAX-A3XV or 660ZSDAXA3XV, is a 6-bolt mounted PTO designed for medium to heavy-duty truck applications. It shifts via wire/cable mechanical actuation and delivers up to 375 lb-ft intermittent torque (508 Nm) with output power exceeding 56 HP. The 1-1/4" round output shaft with keyway suits a wide range of driven equipment. At the shaft, power output reaches 36 HP at 500 RPM, 71 HP at 1,000 RPM, and 107 HP at 1,500 RPM. Compatible transmissions include Eaton/Fuller, Hino, Volvo/Mack, and other 6-bolt manual boxes. One-piece gears and cast iron bearing caps contribute to the 660 Series' load capacity and service life. Call us to confirm proper fit for your specific transmission and application.
The Chelsea 660 Series is suited for aerial devices, dump trucks, service trucks, snow and ice removal equipment, and blower and product pump installations. The 660 Series offers four internal speed ratios and ten shift options across the product family, with 26 output configurations including a 360-degree rotatable flange option for pump fitment flexibility. The cast iron housing and tapered cone bearings on the output shaft, combined with tapered bearings on the input shaft (in place of needle bearings), provide greater load-bearing capability. This unit also supports continuous operation with a 30% de-rating. Sold by Pro Gear and Transmission.
Features
6-Bolt mounting for Eaton/Fuller, Hino, Volvo/Mack, and other manual transmissions
Wire/cable mechanical shift actuation
Intermittent torque capacity up to 375 lb-ft (508 Nm) - check application pages for actual rating
1-1/4" round output shaft with keyway
Shaft power: 36 HP at 500 RPM, 71 HP at 1,000 RPM, 107 HP at 1,500 RPM
One-piece gears, cast iron bearing caps, and greaseable shaft options for extended service life
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 (1,000 RPM), 107 HP (1,500 RPM) / 27 kW (500 RPM), 53 kW (1,000 RPM), 80 kW (1,500 RPM)
- Compatible Transmission Manufacturers: Eaton/Fuller, Hino, Volvo/Mack, Other 6-bolt manual transmissions
- Continuous Operation: Yes, with 30% de-rating
Additional Information
The Chelsea 660 Series is suited for aerial devices, dump trucks, service trucks, snow and ice removal equipment, and blower and product pump installations. The 660 Series offers four internal speed ratios and ten shift options across the product family, with 26 output configurations including a 360-degree rotatable flange option for pump fitment flexibility. The cast iron housing and tapered cone bearings on the output shaft, combined with tapered bearings on the input shaft (in place of needle bearings), provide greater load-bearing capability. This unit also supports continuous operation with a 30% de-rating. Sold by Pro Gear and Transmission.
