The Chelsea 660 Series Power Take-Off, part number 660ZQAHX-A3AZ or 660ZQAHXA3AZ, is a 6-bolt mounted PTO designed for medium to heavy-duty vocational applications. It uses wire/cable mechanical shift and carries an intermittent torque rating up to 375 lb-ft (508 Nm) for the 660 Series - verify your specific application on Chelsea's application pages. The 1-1/4" round output shaft with keyway suits a wide range of hydraulic pump drives. Compatible transmissions include Eaton/Fuller, Hino, Volvo/Mack, and other 6-bolt manual units. Shaft power output reaches 71 HP at 1,000 RPM and 107 HP at 1,500 RPM. Call us to confirm proper fit for your truck and transmission configuration.

• Mounting Type: 6-Bolt
• Shift Type: Wire/Cable, Mechanical
• Output Shaft Type: 1-1/4" Round with Key
• Intermittent Torque (Series): Up to 375 lb-ft / 508 Nm (check application pages for actual rating)
• Continuous Operation: Yes, with 30% de-rating
• 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 Transmissions: Eaton/Fuller, Hino, Volvo/Mack, Other 6-bolt manual units
• Dimensions (H x W x L): 8.38" x 10.38" x 14.25"

The Chelsea 660 Series is suited for aerial devices, dump trucks, service trucks, snow and ice removal equipment, and blower and product pump applications. Four internal speed ratios and ten shift options are available across the 660 Series, with 26 output configurations including Chelsea's 360-degree rotatable flange for flexible pump positioning. Tapered cone bearings on the output shaft and tapered bearings on the input shaft (rather than needle bearings) contribute to the series' load-bearing capability and service life. Continuous operation is supported with a 30% torque de-rating applied.