. MAINTENANCE PERIODIC REPLACEMENT OF SAFETY CRITICAL PARTS 4 - 13 PERIODIC REPLACEMENT OF SAFETY CRITICAL PARTS For usi ng the machine safel y for an exten ded perio d of time, you mus t periodically r eplace the s afety crit ical and f ire prevention-relate d parts list ed in the table of important part s. Materia l quality o f these par ts can chang e as time passes a nd they are l ikely to w ear ou t or d eteriorate . However, it is diffi cult to determine the extent of wea r or deterioration a t the time of p eriodic m aintenance. Hence, it is required to r epl ace them with new o nes regardle ss of the ir conditio n after a certain period of usage.
This is important to mportant ensure that these parts mai ntain their full performance at al l times. Further more, should anythin g abnormal b e found o n any of t hese parts, re place it w ith a new on e even if t he periodic replace ment time for the pa rt has not yet arrived. If any o f the hose clamps sh ow deteriorat ion like d eformatio n or crackin g, replace the clamps at the sa me time as the hos es. rform the following checks with hydraulic hoses which need to be replaced periodically. Tighten all loose and replace defective hoses, as required. eplacing hoses, always replace O-rings, gaskets, and other such parts at the same time.
our Komatsu distributor replace the critical parts. Als o pe clamps and replace defectiv e hoses, as r equired. When r eplacing h oses, alwa ys replace O -rings, g askets, an d other such parts at the same tim Have y our Komatsu distribu tor replace th e critical parts. No.
Safety critical parts for periodic replacement Q'ty Replacement interval 1 F uel hose (fuel tank - hand pump) 1 Every 2 years or every 4000 hours 2 O ver flow hose (supply pump - fuel tank) 1 3 S pill hose (injector nozzle - fuel tank) 1 4 S teering hose (steering cylinder - tube) 4 5 S teering hose (steering valve - stop valve) 2 6 S teering hose (stop valve drain - centralized drain block) 2 7 S teering hose (stop valve - orbit-roll valve) 2 8 S teering hose (orbit-roll valve - centralized drain block) 1 9 S teering hose (centralized drain block - hydraulic tank) 1 10 S teering hose (steering pump - steering valve) 2 11 S teering hose (emergency steering pump - merge block) (if equipped) 1 12 S teering hose (steering pump - rear frame) (if equipped) 1 13 S teering hose (emergency steering pump - hydraulic tank) (if equipped) 1 14 S teering hose (orbit-roll valve - accumulator charge valve) 2 15 S teering hose (steering valve - hydraulic tank) 2 16 S teering hose (steering valve - centralized drain block) 1 17 S teering hose (steering pump - hydraulic tank) 3 18 S teering hose (steering pump - fan pump) 1 S 19 ( teering oil pressure check line hose (for emergency steering) if equipped) 3 20 B rake hose (pump - accumulator charge valve) 1 21 B rake hose (accumulator charge valve - brake accumulator) 2