Changing Control Patterns on the Case CX210B Excavator

[MikePhua]

The Case CX210B and Its Operator-Centric Design
The Case CX210B excavator, introduced in the late 2000s, was part of Case Construction’s B-series lineup aimed at improving fuel efficiency, hydraulic precision, and operator comfort. With an operating weight around 21 metric tons and powered by a Tier III-compliant engine, the CX210B became a popular choice for contractors handling roadwork, utility trenching, and site preparation.
One of the machine’s key features is its pilot-controlled hydraulic system, which allows for responsive and customizable joystick inputs. Among these is the ability to switch between different control patterns—typically “excavator” (ISO) and “backhoe” (SAE)—to accommodate operator preference or regional standards.
Terminology Notes

• Control Pattern: The configuration of joystick movements that control boom, arm, bucket, and swing functions.
  
• ISO Pattern: Common in excavators; left joystick controls swing and boom, right joystick controls arm and bucket.
  
• SAE Pattern: Common in backhoes; left joystick controls swing and arm, right joystick controls boom and bucket.
  
• Pilot Controls: Low-pressure hydraulic signals used to actuate main control valves, allowing smooth and precise operation.
  

Locating the Pattern Changer Valve
On the Case CX210B, the pattern changer is not electronic but mechanical. It is located behind the cab, in the compartment where pilot control hoses converge. The valve is typically a rotary selector or a manual diverter block with labeled ports.
To access and change the pattern:

• Open the rear service panel behind the cab
  
• Locate the pilot control manifold with multiple hose connections
  
• Identify the pattern change valve—often marked with ISO/SAE or Pattern A/B
  
• Rotate the selector or reposition the valve lever to switch patterns
  
• Cycle the ignition and test joystick response before operating
  

A technician in Lincoln once noted that the valve on a CX210B was partially obstructed by a bracket added during a custom cab modification. After repositioning the bracket, the valve could be accessed easily and the pattern changed in under five minutes.
Safety Precautions and Operator Training
Before changing control patterns:

• Ensure the machine is off and hydraulic pressure is relieved
  
• Inform all operators of the change to prevent unexpected control behavior
  
• Place a visible tag or note in the cab indicating the active pattern
  
• Test all functions in a safe area before returning to work
  

In one case, a rental operator in Iowa switched the pattern unknowingly and caused a minor trench collapse due to incorrect boom movement. After that incident, the company implemented a pre-shift control pattern check as part of their safety protocol.
Why Pattern Change Matters in Mixed Fleets
In regions where both excavators and backhoes are used interchangeably, control pattern familiarity can affect productivity and safety. Operators trained on backhoes may struggle with ISO controls, while excavator veterans may find SAE unintuitive.
Benefits of pattern changers:

• Reduces operator fatigue and error
  
• Improves training flexibility
  
• Enhances resale value in diverse markets
  
• Supports multi-operator fleets with varied backgrounds
  

A contractor in Alberta retrofitted all his mid-size excavators with pattern changers and saw a 15% reduction in operator error incidents over six months.
Maintenance and Troubleshooting Tips
To keep the pattern changer functioning:

• Inspect valve body and selector for corrosion or debris
  
• Lubricate moving parts annually with hydraulic-safe grease
  
• Check pilot hoses for wear or leaks near the valve
  
• Replace worn labels to maintain clarity
  

If the pattern fails to change:

• Verify selector movement is complete and not obstructed
  
• Check for internal spool sticking due to contamination
  
• Confirm pilot pressure is reaching the correct ports
  
• Consult the hydraulic schematic for hose routing and valve logic
  

A fleet manager in Texas once discovered that a pattern change valve had been bypassed during a previous repair. Restoring the original hose routing resolved the issue and restored full functionality.
Final Thoughts
The Case CX210B offers a reliable and operator-friendly platform, and its mechanical pattern changer adds versatility for mixed fleets and varied operator preferences. Understanding its location, operation, and maintenance ensures safe and efficient transitions between control styles. Whether on a trenching job or a demolition site, the ability to adapt control patterns can make the difference between smooth operation and costly mistakes. With proper training and routine inspection, this feature remains a valuable asset in the excavator’s toolkit.