. SAFETY PRECAUTIONS FOR MAINTENANCE 2 - 41 PERIODIC REPLACEMENT OF SAFETY CRITICAL PARTS It is recommen ded to carry ou t machine refueling , i nspection work withou a periodic basis s o that the machine may b e used safely for an e xtend ed period of t ime. Be sure to periodically replace the hos es in particular, which are safety critical parts o f the m achine. Replacement of safety critical parts: See " PERIODIC REPLACEMEN T OF SAFET Y CRITICAL P ARTS ( PAGE 4-19) The material of these components natural ly changes over time , and r epeated use causes deterioration, wear, and fatigue . As a result, there is a hazard that t hese components m ay fail an d cause serious i njury or death.
It is difficul t to judge the remaining life o f thes e components inspection or the operating, s o al ways replace them at the s pecified interval Replace or repa ir safety-critical parts if any defect is found, even when they hav e no t reached the time specified interval.