Komatsu WA700-3 Wheel Loader Service Manual

Table of Contents

01 General ………………………………………………………………………………… 01-1
10 Structure and function……………………………………………………………..10-1
20 Testing and adjusting…………………………………………………………….. 20-1
30 Disassembly and assembly……………………………………………………… 30-1
40 Maintenance standard…………………………………………………………… 40-1
90 Others………………………………………………………………………………….. 90-1

Oil becomes contaminated quickly
General causes why oil becomes contaminated quickly

• Entry of exhaust gas into oil due to internal wear
• Clogging of lubrication passage
• Defective combustion
• Improper fuel used
• Operation under excessive load • Oil change interval is too long

General causes why fuel consumption is excessive
• Leakage of fuel
• Defective condition of fuel injection
• Excessive injection of fuel
• Defective HPI sensor

Oil pressure caution lamp lights up (drop in oil pressure)
General causes why oil pressure caution lamp lights up
• Leakage, clogging, wear of lubricating system
• Defective oil pressure control
• Improper selection of fuel (insufficient viscosity)
• Deterioration of oil due to overheating