How to maintenance wheel loaders?

How to maintenance wheel loaders?
1. Check the engine oil level
Put the machine on the flat ground to check the oil level before driving.
Take out the dipstick and wipe it clean.
Fully insert the dipstick from the hole, then take it out.
If the oil level is too low, you should refuel and check again.
*If the oil is dirty or diluted, the oil must be changed no matter what.
*You should check the oil level after the machine is off for more than 15 min.
*If the oil position is wrong, do not start the engine.
2. Change of the engine oil and filter
Warm up the engine
Remove the bolts to allow the oil to drain.

Clean the upper part of the filter, remove the filter and clean the surface of the gasket.