Mounting a Bobcat 709 Backhoe on a 773G Loader

[MikePhua]

The Bobcat 773G and Its Attachment Ecosystem
The Bobcat 773G skid-steer loader is part of the G-series lineup introduced in the early 2000s, designed for versatility, mid-range power, and compatibility with a wide array of hydraulic and mechanical attachments. With a rated operating capacity of approximately 1,750 pounds and a 46-horsepower diesel engine, the 773G became a popular choice for contractors, landscapers, and municipalities seeking a compact machine with serious lifting and digging capability.
Bobcat, founded in 1947, pioneered the skid-steer concept and built its reputation on modular design. The 773G was engineered with a standard quick-attach system and auxiliary hydraulics, making it compatible with dozens of attachments—from buckets and forks to trenchers and backhoes.
The Bobcat 709 Backhoe and Its Mounting Requirements
The Bobcat 709 backhoe is a frame-mounted digging attachment designed for use with select skid-steer loaders. It offers:

• Dig depth: ~9 feet
  
• Bucket breakout force: ~3,600 pounds
  
• Swing arc: ~180 degrees
  
• Hydraulic flow requirement: ~10–12 GPM
  
• Mounting style: Subframe with stabilizer legs and quick-attach interface
  

Terminology Note: “Subframe” refers to a structural bracket that distributes digging forces across the loader’s frame. “Stabilizer legs” are hydraulic or mechanical arms that extend to the ground to prevent tipping during excavation.
The 709 backhoe is not a universal fit—it requires specific mounting brackets and hydraulic connections tailored to each loader model. For the 773G, compatibility depends on whether the loader has the correct subframe mounts and auxiliary hydraulic couplers.
Mounting Challenges and Retrofit Strategies
Common challenges when mounting a 709 backhoe to a 773G include:

• Missing subframe brackets on the loader
  
• Incompatible hydraulic coupler spacing or flow rate
  
• Clearance issues with rear frame or counterweight
  
• Electrical harness mismatch if using joystick-controlled auxiliary functions
  

Solutions:

• Source OEM or aftermarket subframe brackets designed for the 773G
  
• Install flat-faced hydraulic couplers rated for 3,000 psi
  
• Use flow restrictors if the 773G’s hydraulic output exceeds backhoe specs
  
• Add a manual valve block if electronic control is unavailable
  
• Reinforce loader rear frame with bolt-on gussets if needed
  

In 2022, a contractor in Iowa retrofitted a 709 backhoe onto his 773G by fabricating custom mounts using 3/8-inch plate steel and welding them to the loader’s rear frame. He added a hydraulic selector valve to toggle between the backhoe and other attachments.
Operational Tips and Safety Considerations
Once mounted, the 709 backhoe transforms the 773G into a compact excavator. Best practices include:

• Always deploy stabilizer legs before digging
  
• Avoid side-loading the boom to prevent frame stress
  
• Use low throttle during initial trenching to control swing
  
• Check hydraulic fluid level before and after use
  
• Grease all pivot points weekly
  

Safety tips:

• Never operate the backhoe with the loader arms raised
  
• Keep bystanders clear of swing arc and stabilizer zone
  
• Inspect hoses and fittings for leaks before each shift
  
• Use a spotter when digging near utilities or structures
  

A municipal crew in Ontario added reflective tape and warning decals to their 709 backhoe after a near miss during roadside trenching. The visual cues improved awareness and reduced incidents.
Maintenance and Long-Term Compatibility
To maintain the 709 backhoe:

• Replace bucket teeth every 300 hours or when worn
  
• Inspect swing cylinder seals quarterly
  
• Flush hydraulic lines annually
  
• Touch up paint and rustproof exposed metal
  
• Store indoors or under cover to prevent UV damage
  

Upgrade options:

• Install a hydraulic thumb for material handling
  
• Add LED work lights to boom and stabilizers
  
• Retrofit joystick controls with proportional valves
  
• Use quick-disconnect pins for faster removal
  

In 2023, a fleet manager in Colorado added a hydraulic thumb to his 709 backhoe, allowing the 773G to handle rocks and debris more efficiently during trail construction.
Conclusion
Mounting a Bobcat 709 backhoe to a 773G loader is a practical way to expand digging capability without investing in a dedicated excavator. With the right brackets, hydraulic setup, and safety protocols, the combination delivers reliable trenching and utility work in compact spaces. Whether digging footings or repairing water lines, the 773G and 709 pairing proves that versatility and power can coexist in a single machine. In the world of compact equipment, adaptability is the ultimate advantage.