Komatsu WA90-5, WA100M-5 Wheel Loader Repair Manual

Manuals: Shop Manual
General
Structure and Functions
Testing and Adjusting
Disassembly and Assembly
Maintenance Standard
Others
Hydraulic Schematics
Electrical Schematics
Manual Extract Basic procedures of maintenance:
Oil
The oil in the engine and in the hydraulic system is subject to extreme conditions (high temperatures, high pressures). Therefore, the oil quality will decrease with extended operation.
Always use oils prescribed for the works and temperatures indicated in the operating and maintenance manual.
Always observe the prescribed oil change intervals.

Always handle oils with extreme care so that they are not contaminated. When storing or refilling oil, make sure that it is not contaminated. The majority of all malfunctions is caused by the penetration of dirt and other contamination.

Never mix oil of different brands or types.
Always refill the prescribed oil quantity. Too little or excessive oil may cause malfunctions.
If the oil in the hydraulic system is not clear (milky), water or air is probably introduced into the circuit. In such cases, call your Komatsu dealer.
Upon each oil change, the related filter must be replaced as well.
We recommend to have an oil analysis carried out in regular intervals in order to check the machine condition.
Customers who desire such an oil analysis should contact their Komatsu dealer.