The Chelsea 660 Series Power Take-Off, part number 660XQAHX-A3XY or 660XQAHXA3XY, is built for medium to heavy duty vocational applications requiring a 6-bolt manual transmission mount. The 660 Series features a cast iron housing with tapered cone bearings on the output shaft for a torque capacity up to 375 lb-ft intermittent, making it a stronger choice than the 442 Series where higher torque demands are a factor. The series offers four internal speed ratios and ten shift options, including wire/cable and mechanical shift. Output configurations span SAE A, SAE B, and ISO 7652 pump flanges as well as driveline outputs. Continuous operation is supported with a 30% de-rating. Call us to confirm proper fit and output configuration for your specific application.
Features
6-bolt mounting fits most popular manual transmissions including Eaton/Fuller and Volvo/Mack
Cast iron housing with tapered cone bearings on output shaft for high torque capacity
Intermittent torque rating up to 375 lb-ft (508 Nm) for the 660 Series
Continuous operation capable with 30% de-rating applied
Ten shift options including wire/cable and mechanical shift
Four internal speed ratios with 26 output configurations including SAE A, SAE B, ISO 7652 flanges, and driveline
Tech Specs
- Mounting Type: 6-Bolt
- Transmission Compatibility: Most popular 6-bolt manual transmissions (Eaton/Fuller, Volvo/Mack, other)
- Intermittent Torque Capacity: Up to 375 lb-ft (508 Nm) - verify actual rating on application page
- Continuous Operation: Yes, with 30% de-rating
- Shift Type: Wire/Cable or Mechanical
- Output Flange Options (Series): SAE A, SAE B, ISO 7652 Pump Flange, Driveline
- Output Shaft Options (Series): Round Shaft 1-1/4" - 5/16" Key; SAE A 5/8" - 9T Spline; SAE B 7/8" - 13T Spline; SAE BB 1" - 15T Spline; SAE C 1-1/4" - 14T Spline; 3/4" - 11T Spline; DIN 5462 Spline; 1410 Companion Flange
- Output Power (Series): 56+ HP / 51+ kW
- Shaft Power (Series): 36 HP at 500 RPM, 71 HP at 1000 RPM, 107 HP at 1500 RPM
- Housing Material: Cast Iron
- Internal Speed Ratios: 4
- Shift Options: 10
- Output Configurations: 26
- Lubricant: No Pressure Lube (X designation)
- NMFC Code: 128520 - Hydraulic PTOs, Pumps, Motors, etc.
Additional Information
Parts Manual: Chelsea 660 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
