Komatsu GD555-5 Operation & Maintenance Manual page 283

SERVICE PROCEDURE
5. Check the rubber hose. Replace with a new one if the hose is found to have cracks or to be hardened by ageing.
Further, check hose clamps for looseness.
6. Install panels (4) and (2), then tighten the bolts (3) and (1) to the specified tightening torque.
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MAINTENANCE