Integrating a CAT 6-Way Dozer Blade with Non-CAT Skid Steers

[MikePhua]

The CAT 6-Way Blade and Its Versatility
The Caterpillar 6-way dozer blade, part number 231-5277, was originally designed for compact track loaders like the CAT 247B. This blade features hydraulic control over six degrees of movement—up/down, tilt left/right, and angle left/right—making it ideal for fine grading, site prep, and snow removal. Its popularity stems from its rugged build, responsive hydraulics, and compatibility with CAT’s auxiliary electrical systems.
By the mid-2010s, thousands of these blades had been sold across North America, often ending up in auctions, fleet retirements, or private resale. As a result, many operators began retrofitting them onto non-CAT machines such as Komatsu, New Holland, and Bobcat skid steers. This cross-brand adaptation, while mechanically feasible, introduces challenges in electrical integration and hydraulic control.
Common Wiring Challenges and Connector Mismatches
The CAT 6-way blade uses an electric solenoid block to control tilt and angle functions. These solenoids are activated via a multi-pin connector—typically 8-pin or 14-pin—wired to the host machine’s auxiliary control system. When retrofitting to a non-CAT skid steer, mismatches in pin configuration, voltage logic, and signal routing can prevent proper operation.
Typical issues include:

• Swapped tilt and angle hoses due to incorrect solenoid wiring
  
• Incompatible pinouts between CAT’s 8-pin connector and Bobcat’s 14-pin ACD system
  
• Lack of wiring diagrams for older blades
  
• Confusion over ground and power wire identification
  

Operators often resort to trial-and-error wiring, which risks shorting solenoids or damaging control modules. A safer approach involves sourcing the original electrical schematic for the blade and matching it to the host machine’s accessory harness.
Identifying Blade Origin and Serial Number Relevance
Each CAT blade carries a serial number and part number stamped on a metal tag. For example:

• Part Number: 231-5277
  
• Serial Number: PRSSDB001028
  

These identifiers help trace the blade’s original application and wiring configuration. Blades removed from CAT 247B machines typically use a 12V system with momentary rocker switches for solenoid activation. Knowing the donor machine model allows technicians to locate factory schematics and connector pinouts.
In one case, a blade marked with crayon as “247B” was successfully wired to a Komatsu SK820-5N after matching solenoid functions to joystick inputs using a relay-powered rocker switch.
Building a Custom Control Harness
For machines lacking factory blade support, a custom harness can be fabricated. Key components include:

• Momentary two-way rocker switches (spring-loaded to center)
  
• 12V relay with inline fuse protection
  
• Weatherproof connectors rated for outdoor use
  
• Shielded wire to prevent signal interference
  
• Mounting bracket for in-cab installation
  

Wiring strategy:

• Power source from ignition-switched circuit
  
• Ground wire to chassis or battery negative
  
• Switch outputs routed to solenoid terminals via relay
  
• Labeling each wire for tilt-left, tilt-right, angle-left, angle-right
  

Operators should test each function individually and confirm hydraulic response before finalizing the harness. Using a multimeter to verify voltage at each solenoid pin reduces the risk of miswiring.
Connector Adaptation Between Brands
When connecting a CAT blade to a Bobcat or New Holland loader, adapter cables may be required. For example:

• CAT 8-pin to Bobcat 14-pin ACD
  
• New Holland 8-pin to custom 6-plug breakout
  

These adapters must match signal logic and voltage levels. Some cable manufacturers offer configurable harnesses where pin assignments can be specified during ordering. Providing the blade’s wire colors and solenoid functions ensures accurate pin mapping.
In one documented retrofit, a New Holland LT185.B was successfully paired with a CAT 6-way blade using a custom 8-pin harness. The operator identified wire colors—purple, green, blue, white, and brown—and matched them to the loader’s accessory outputs using a schematic provided by the cable supplier.
Tips for Successful Integration
To ensure smooth blade operation:

• Always verify solenoid resistance before wiring (typically 10–15 ohms)
  
• Use dielectric grease on connectors to prevent corrosion
  
• Secure wires with loom and clamps to avoid abrasion
  
• Label each wire and document the configuration for future service
  
• Test blade movement with engine running and hydraulic flow active
  

If the blade fails to respond, check for:

• Blown fuse in the relay circuit
  
• Incorrect ground connection
  
• Solenoid coil failure
  
• Hydraulic hose routing errors
  

A Field Story from Delaware
A fleet manager in Dover retrofitted a CAT 6-way blade onto a Bobcat loader using a 14-pin to 9-pin adapter. Initially, the blade tilted when angled and vice versa. After tracing the pinout and swapping two wires, the functions aligned correctly. He later added LED indicators to the rocker switches to confirm solenoid activation during operation. The blade became a key tool for winter snow grading and spring site prep.
Conclusion
Integrating a CAT 6-way dozer blade with non-CAT skid steers is a rewarding but technically demanding task. Success hinges on understanding solenoid wiring, connector compatibility, and hydraulic routing. With careful planning, accurate schematics, and quality components, operators can unlock the full versatility of these blades—transforming their compact loaders into precision grading machines across brands and terrains.