. OPERATION OPERATION HANDLING THE TIRES PRECAUTIONS WHEN HANDLING TIRES CAUTION other (1) (2) (3) (4) (5) (6) (7) Side wall Shoulder Tread Breaker or belt (cord layer) Bead Inner liner Carcass Please contact your Komatsu distributor when replacing the tires. It is dangerous to jack up the machine without taking due care. 3 - 153 If a tire ha s reached a ny of the followin g service limits , ther e is danger the tire m ay burst or cause an accident , so to ensure safety , replace it a n ew tire . e limits for wear Servic e limits for When the remaini ng depth of the g rooves on construction equip tires (a t a point ap prox. 1/4 of the trea d width) is 15 % of th e groove d on a n ew tire.
the tire sh ows marked uneven wear, stepped wear or o when the cord layer is exposed. damage When abnor mal wear, or when the cord la yer is exposed Servic e limits for damage When there is ext ernal damage exte nding to the c ord or when the is brok en the cord is cut or there is dragging the tire is peeling (there is separation) the bead is damaged beless tires, when there is air leakage or improper repair install a tire protector (mesh chain) to the rear tires.
When the cord is cut or there is dra When the tire is p eeling (there is se When the bead is damaged For tu beless tires , when there is air leakage or imprope Do not install a tir e protector (mesh chain) to the r ear ti TIRE PRESSUR E ressure before starting operations, when the tires are cool. Measure the tire p ressure before s tarting operations , when th e tires are cool. If t he tire inflation pressure is too l ow, there will be o verload; if it is too hi gh , it will cause tire cuts and shock burst.
To preve nt these p roblems, adjust the tire inflation p ressure a ccording t o the table on the next pa Deflectio n ratio = As a gui deline that can be checke d visibly, the deflection ratio of the fro nt tire (deflection/free heig ht) is as fo llows. When ca rrying nor mal load (lift arm horizontal): Approx. 15 to 25 % When di gging (rea r wheels off gro und): Approx . 25 t o 35 %