. 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. Materi al 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 diff icult 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. Furthe rmore, 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. erform 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 p 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 - water separator) 1 Every 2 years or every 4000 hours 2 F uel hose (water separator - priming pump) 1 3 F uel return hose (injection pump - fuel tank) 1 4 F uel spill hose (injector - injector) 5 5 F uel spill hose (unit injector - fuel tank) 1 6 S teering hose (pump - steering valve) 1 7 S teering hose (steering valve - steering cylinder) 4 8 S teering hose (steering valve - hydraulic tank) 2 9 B rake hose (pump - accumulator charge valve) 2 10 B rake hose (accumulator charge valve - check valve) 1 11 B rake hose (check valve - tandem valve) 2 12 B rake hose (check valve - single valve) 1 13 B rake hose (check valve - accumulator P.P port) 1 14 B rake hose (tandem valve - front brake) 2 15 B rake hose (tandem valve - rear brake) 2 16 B rake hose (single valve - tandem valve) 1 17 B rake hose (tandem valve - drain block) 1 18 B rake hose (single valve - drain block) 1 19 B rake hose (drain block - hydraulic tank) 1 B 20 b rake hose (brake accumulator - reduction valve for emergency parking rake cancel) 1 B 21 b rake hose (transmission valve - reduction valve for emergency parking rake cancel) 1 22 B rake hose (charge valve drain - hydraulic tank) 1 23 A ccumulator (For PPC) 1 24 A larm 2 25 S eat belt 1 Every 3 years