The Chelsea 680DQMBX-56XY or 680DQMBX56XY is an 8-bolt Power Take-Off from the Chelsea 680 Series, designed for medium-to-heavy duty manual transmission applications. The 680 Series is built around a cast iron housing with tapered cone bearings on the output shaft, giving the unit a high intermittent torque rating suited to demanding loads such as pneumatic blowers. The series covers Eaton Fuller transmissions and includes a deep-mount housing option for Mack applications. Output choices across the 680 Series span SAE A, SAE B, and other pump flange configurations, and the series supports wire/cable or mechanical shift. Continuous operation is supported with a 30% de-rating. Call us to confirm proper fit for your transmission and application.
Features
8-bolt mounting for coverage across most manual transmissions with an 8-bolt PTO aperture
Cast iron housing with tapered cone bearings on the output shaft for durability under high-torque loads
Designed for high-torque applications including pneumatic blowers
Deep-mount housing option available for Mack transmission applications
Supports continuous operation with a 30% de-rating
Wire/cable or mechanical shift options across the 680 Series
Tech Specs
- Mounting Type: 8-Bolt
- Shift Type: Wire/Cable or Mechanical (series)
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, Daimler/Detroit (series)
- Output Options: SAE A Pump Flange, SAE B Pump Flange, ISO 7652 Pump Flange, Driveline (series)
- Intermittent Torque: 301 to 400 lb-ft (series; verify actual rating on application page)
- Continuous Operation: Yes, with 30% de-rating
- Output Power: 56+ HP / 51+ kW (series)
- Housing Material: Cast iron
- Bearing Type: Tapered cone on output shaft
Additional Information
The Chelsea 680 Series PTO fits most manual transmissions with an 8-bolt PTO aperture and is a common choice for vocational applications including dump trucks, aerial equipment, fire and rescue, refuse, snow and ice removal, service trucks, and blower/product pump systems. The series offers four internal speed ratios and ten shift options. The 360-degree rotatable flange design, available across the series, provides flexibility for pump positioning. Parker documents covering this unit include the 680 Series Owner's Manual, the 680 Series Parts List (HY25-2660-M1_US), and the Chelsea PTO General Information Catalog.Parts Manual: Chelsea 680 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
