Komatsu WA300-1, WA320-1 Wheel Loader Repair Service Manual

Table of Contents

Komatsu WA300-1, WA320-1 Manual

Main sections and selected subjects identified in the source documentation:

• Manuals: Shop Manual
• Contents
• General
• Engine
• Power Train
• Steering System
• Brake System
• Work Equipment System
• Electric and Electronic System
• Others
• Manual Extract Parts Checking Instructions
• Knowing the cause of the defect, the service man can give good advice to the customer to prevent him from having the same trouble again.
• Visual inspection can not find minute or hidden damage. Other methods of inspection are as follows;
• a) Water-pressure or air-pressure test
• b) Cold check or magnetic damage test
• CRACKS
• If the part is found to be cracked by visual inspection, it should be replaced or repaired.
• If the length or depth of crack exceeds 1/3 of the thickness of the part, it should be replaced instead o f repaired.
• A part having an internal crack should be replaced.
• PITTING
• 1) Pitting by cavitation
• In most cases, cavitation is accompanied by chemical corrosion. After removing rust or scale, carefully inspect the depth of pitting.
• When the pitting can not be repaired within the allowable limit, replace the part.
• If pitting is not deep, resurface the part after removing the rust and scale.
• 2) Pitting due to removal of surface • If ball bearing is pitted, replace it.
• If more than 1/3 of the contact face is pitted, the part should be replaced.
• If pitting is not serious, resurface the part.