Zetor PRIMO HT 20 NC Operator's Manual page 98

(2) Change
Unscrew the drain plug at the bottom of the engine to drain contaminated engine oil.

As hot oil comes from the engine, be careful not to burn yourself.
After draining the oil, screw the drain plug back on.

Fill the specified amount of the specified engine oil through the filler hole.

1- Engine Oil Drain Plug
NOTE
The amount of engine oil added must not exceed the upper limit.

Before starting the engine, check the engine oil or do so 5 minutes after stopping the engine.

If you want to use a different oil from a different manufacturer or oil with a different viscosity,

drain the used oil completely before filling.
(3) Oil Specification
Oil for diesel engines: (API: CD/CF Tractor is supplied from the factory with 10W/30 oil)
Notice:
If engine oil comes in contact with the skin, it can irritate it and cause skin disease. In this

case, wash your skin with soap and water or hand cleaner.
Before draining the oil, make sure that the engine has cooled down sufficiently. When

changing the oil immediately after stopping the engine, the engine is very hot and can cause
burns.
MAINTENANCE
PRIMOHT20NC_0094
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