Lubricating Oil - Yanmar 3YM20 Operation Manual

3. OPERATION
(3) Fuel Tank
The inside of the fuel tank should al-
ways be clean enough and it should
be dry for the first use. Drain the water
according to the maintenance (section
5) with a drain valve.
C
A Sediment
B Drain cock
EN
(4) Fuel System
Install the fuel pipe from the fuel tank
to the fuel pump in accordance with
the diagram. The fuel/water separator
(optional) is placed at the center sec-
tion of the line.
Fuel System
A
B
I
E
A Fuel filter
B Fuel feed pump (prim-
ing lever)
C Fuel/water separator
D Approx. 20-30 mm(3/
4"-1 1/8")
E Within 500 mm(20")
22
B
C To engine
H
C
J
D
G
F
F Drain cock
G Fuel cock
H Fuel return
I To fuel injection pump
J Fuel tank
NOTICE
When other than the specified fuel oil is
used, the engine will not perform to full
capacity and parts may be damaged.

3.1.2 Lubricating Oil

NOTICE
Using other than the specified lubricat-
ing oil will lead to seizure of parts, ab-
normal wear, and shorten engine life.
(1) Selection of Engine Lubricating Oil
Use the following Lubricating oil:
• API Classification ........... CD or better
TBN value: 9 or more
The oil must be changed when the To-
tal Base Number (TBN) has been re-
duced to 2.0.
*TBN (mgKOH/g) test method;
JIS K-2501-5.2-2(HCl), ASTM
D4739(HCl)
• SAE viscosity ......... 10W30 or 15W40
If you operate your engine at tempera-
tures below the limits shown below,
consult your dealer for special lubri-
cants and starting aids.