The Chelsea 660GSAHX-V5XD or 660GSAHXV5XD is a 660 Series Power Take-Off built for medium- to heavy-duty vocational applications. It mounts to popular 6-bolt manual transmissions compatible with Eaton/Fuller, Hino, Volvo/Mack, and other manufacturers. Shift type is wire/cable mechanical. The output shaft is a 1-1/4" round configuration, available with key. Intermittent torque capacity for the 660 Series reaches 375 lb-ft (508 Nm); check application pages to confirm the actual rating for this specific configuration. Shaft power output runs 36 HP at 500 RPM, 71 HP at 1000 RPM, and 107 HP at 1500 RPM. Typical uses include dump trucks, aerial devices, service trucks, and blower and product pumps. Call us to confirm proper fit for your transmission and application.

The Chelsea 660 Series features a cast iron housing with tapered cone bearings on the output shaft for extended service life. Tapered bearings on the input shaft replace needle bearings for greater load-bearing capability. The 660 Series offers twenty-six output options and four internal speed ratios. Continuous operation is supported with a 30% de-rating. Output flange options include SAE A, SAE B, and ISO 7652 pump flanges, as well as driveline configurations. Common applications include aerial devices, dump trucks and trailers, service trucks, snow and ice removal equipment, and blower and product pumps.
Features
6-Bolt mounting for compatibility with popular manual transmissions including Eaton/Fuller, Hino, and Volvo/Mack
Wire/cable mechanical shift type
1-1/4" round output shaft with key option
Intermittent torque capacity up to 375 lb-ft (508 Nm) for the 660 Series; verify actual rating on application pages
Shaft power: 36 HP at 500 RPM, 71 HP at 1000 RPM, 107 HP at 1500 RPM
One-piece gears, cast iron bearing caps, and greaseable shaft options
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 Manufacturer: Eaton/Fuller, Hino, Volvo/Mack, Other
- Output Shaft Type: 1-1/4" Round; 1-1/4" Round with Key
- Mounting Type: 6-Bolt
- Shaft Power: 36 HP (500 RPM), 71 HP (1000 RPM), 107 HP (1500 RPM) / 27 kW (500 RPM), 53 kW (1000 RPM), 80 kW (1500 RPM)
Additional Information

The Chelsea 660 Series features a cast iron housing with tapered cone bearings on the output shaft for extended service life. Tapered bearings on the input shaft replace needle bearings for greater load-bearing capability. The 660 Series offers twenty-six output options and four internal speed ratios. Continuous operation is supported with a 30% de-rating. Output flange options include SAE A, SAE B, and ISO 7652 pump flanges, as well as driveline configurations. Common applications include aerial devices, dump trucks and trailers, service trucks, snow and ice removal equipment, and blower and product pumps.
Parts Manual: Chelsea 660 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
