The Control Gauge Kit 86751831 provides critical operational data for HC25 Hydraulic Rock Drills, including hydraulic pressure and oil temperature, enabling operators to maintain safe and efficient operation. Generic gauge kits often include low-precision gauges (error ≥3%) that become inaccurate within 1500-1800 hours, leading to improper drill operation. This OEM kit features precision gauges with ±1% error tolerance and corrosion-resistant stainless steel cases, ensuring accurate readings even in humid mine environments. It includes all necessary mounting hardware and hoses, simplifying installation, and requires replacement only if gauges become inaccurate or damaged.