The Chelsea 660XHAHX-A4AZ or 660XHAHXA4AZ is a Power Take-Off from Chelsea's 660 Series, designed to fit most popular manual 6-bolt transmissions in medium to heavy-duty applications. The 660 Series is built around a cast iron housing with tapered cone bearings on the output shaft, giving it a series torque rating up to 375 lb-ft intermittent. Tapered bearings on the input shaft replace needle bearings for greater load capacity. The series supports wire/cable or mechanical shift types and is available with multiple output configurations, including SAE A and SAE B pump flanges and driveline outputs. Continuous operation is supported with a 30% de-rating. Call us to confirm proper fit for your application.
Features
Chelsea 660 Series Power Take-Off, part number 660XHAHX-A4AZ or 660XHAHXA4AZ
Fits most popular 6-bolt manual transmissions, including Eaton/Fuller and Volvo/Mack
Cast iron housing with cast iron bearing caps for durability in demanding vocational applications
Tapered cone bearings on input and output shafts for higher load capacity than needle-bearing designs
Series intermittent torque rating up to 375 lb-ft (508 Nm); continuous operation with 30% de-rating
Shift types: wire/cable or mechanical; multiple output options including SAE A, SAE B, and driveline
Tech Specs
- Mounting Type: 6-Bolt
- Shift Type: Wire/Cable or Mechanical
- Output Type: SAE A Pump Flange, SAE B Pump Flange, ISO 7652 Pump Flange, Driveline
- Intermittent Torque (Series Rating): Up to 375 lb-ft (508 Nm)
- Continuous Operation: Yes, with 30% de-rating
- Output Power (Series): 56+ HP / 51+ kW
- Shaft Power (Series): 36 HP at 500 RPM, 71 HP at 1,000 RPM, 107 HP at 1,500 RPM
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, and other 6-bolt manual transmissions
- Lubricant: No Pressure Lube (X designation)
- NMFC Code: 128520 (Hydraulic PTOs, Pumps, Motors)
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 applications. Parker Chelsea publishes the following reference documents for this series: 660 Series Parts List (HY25-2660-M1_US), 660 Series Sales Literature, and the 340/348/442/447/489/660/680/823/863/880 Series Owner's Manual. Additional technical notices include PTO-PNI-250 covering new 660/680 Series ratio and output options, and PTO-PNI-275 covering RK and RJ output options. Contact Pro Gear and Transmission to confirm the correct PTO configuration for your specific transmission and output requirements.Parts Manual: Chelsea 660 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
