SAFETY 20. ROPS Structure Role Over Protective Structure cautions. Never weld, drill or cut on the ROPS If it becomes damaged, contact your Komatsu Dealer. 21. Brake Fluid Use the correct fluid in the hydraulic braking system. Using the wrong brake fluid may cause damage to the brake system which could lead to brake failure. 22. Backhoe Levers Operation 1-30 WB140-2N, WB150-2N