The Chelsea 680DFMCX-54RK is an 8-bolt Power Take-Off from the Chelsea 680 Series, designed for medium to heavy duty manual transmission applications including Eaton Fuller and Mack configurations. The 680 Series features a cast iron housing with tapered cone bearings on the output shaft for extended service life in higher-torque applications such as pneumatic blowers. The series is rated for intermittent torque of up to 375 lb-ft and supports continuous operation with a 30% de-rating. Shift type is wire/cable or mechanical. Multiple output configurations are available across the 680 Series, including SAE A, SAE B, and driveline outputs, paired with a space-saving air shift cover for maximum underhood clearance.
Features
8-bolt mounting for compatibility with most manual transmissions featuring an 8-bolt PTO aperture
Cast iron housing with tapered cone bearings on the output shaft for high torque capacity
Intermittent torque rating up to 375 lb-ft across the 680 Series
Continuous operation supported with 30% de-rating
Wire/cable or mechanical shift options
Deep mount housing option available for Mack transmission applications
Tech Specs
- Mounting Type: 8-Bolt
- Shift Type: Wire/Cable, Mechanical
- Output Type: SAE A Pump Flange, SAE B Pump Flange, ISO 7652 Pump Flange, Driveline
- Intermittent Torque (Series): 375 lb-ft (508 Nm) - check application pages for actual rating
- 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 1000 RPM, 107 HP at 1500 RPM
- Output Shaft Options: Round Shaft (1-1/4" - 5/16" Key), SAE A (5/8" - 9T) Pump Spline, SAE B (7/8" - 13T) Pump Spline, SAE BB (1" - 15T) Pump Spline, SAE C (1-1/4" - 14T) Pump Spline, 1410 Companion Flange
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, Daimler/Detroit
- Housing Material: Cast Iron
Additional Information
The Chelsea 680 Series is engineered for vocational applications including aerial work, snow and ice removal, fire and rescue, dump truck and trailer, refuse, and blower and product pump systems. A deep mount housing option extends compatibility to Mack transmission installations. The series supports 32 output configurations and four internal speed ratios, with Chelsea's 360-degree rotatable flange available for flexible pump positioning. Applicable Parker Chelsea documentation includes the 680 Series Owner's Manual, 680 Series Parts List (HY25-2660-M1_US), and the Chelsea Power Take-Off General Information Catalog.Parts Manual: Chelsea 680 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
