The Chelsea 680GRAHX-P3XD or 680GRAHXP3XD is a medium- to heavy-duty Power Take-Off from the Chelsea 680 Series, engineered for manual transmissions with 8-bolt PTO apertures. The 680 Series uses a cast iron housing with tapered cone bearings on both the input and output shafts, which delivers a higher torque rating and longer service life compared to designs that rely on needle bearings. The series is rated for intermittent torque up to 375 lb-ft (508 Nm), with continuous operation supported at a 30% de-rating. Shift options for this series include wire/cable and mechanical configurations. Common vocational applications include pneumatic blowers, dump trucks, aerial units, refuse, and fire and rescue equipment. Call us to confirm proper fit for your transmission and application.
Features
Chelsea 680 Series PTO with 8-bolt mounting for most manual transmission applications
Cast iron housing with tapered cone bearings on input and output shafts
Intermittent torque rating up to 375 lb-ft (508 Nm); continuous operation with 30% de-rating
Wire/cable and mechanical shift options available across the series
Deep mount housing option supports Mack transmission applications
Vocational applications include pneumatic blowers, dump trucks, aerial, refuse, and fire and rescue
Tech Specs
- Mounting Type: 8-Bolt
- Shift Type: Wire/Cable, Mechanical
- Intermittent Torque: Up to 375 lb-ft (508 Nm) - check application pages for actual rating
- Continuous Operation: Yes, with 30% de-rating
- Output Options: SAE A Pump Flange, SAE B Pump Flange, ISO 7652 Pump Flange, Driveline
- Output Shaft Types: Round Shaft (1-1/4 in. with 5/16 in. key), SAE A (5/8 in. 9T), SAE B (7/8 in. 13T), SAE BB (1 in. 15T), SAE C (1-1/4 in. 14T), 1410 Companion Flange
- Output Power: 56+ HP / 51+ kW
- Shaft Power: 36 HP at 500 RPM, 71 HP at 1000 RPM, 107 HP at 1500 RPM
- Housing Material: Cast Iron
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, Daimler/Detroit, and others with 8-bolt aperture
Additional Information
The Chelsea 680 Series is designed with higher torque applications in mind, including pneumatic blower systems common on bulk tankers and product-delivery trucks. The space-saving air shift cover is designed to maximize clearance under the vehicle. Across the series, Parker Chelsea offers 32 output options including a 360-degree rotatable flange for flexible pump positioning, four internal speed ratios, and ten shift options. This series covers vocational markets including aerial, snow and ice removal, dump truck and trailer, service trucks, refuse, and fire and rescue. Part number 680GRAHX-P3XD is also referenced as SP680GRAHX-P3XD. For document references, Parker Chelsea publishes the 680 Series Parts List (HY25-2660-M1_US) and 680 Series Sales Literature, as well as the Chelsea PTO General Information Catalog and the Detroit DT12 Adapter Owner's Manual covering 680 Series installations.Parts Manual: Chelsea 680 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
