Yanmar engines LV series (L48V, L70V, L100V). Manual - part 11

BEFORE YOU OPERATE

30

LV Operation Manual

3. High viscosity at low temperatures may result 

in fuel delivery problems, injection pump 
seizures, and poor injection nozzle spray 
atomization.

4. FAME may have adverse effects on some 

elastomers (seal materials) and may result in 
fuel leakage and dilution of the engine 
lubricating oil.

5. Even bio-diesel fuels that comply with a 

suitable standard as delivered, will require 
additional care and attention to maintain the 
quality of the fuel in the equipment or other 
fuel tanks. It is important to maintain a supply 
of clean, fresh fuel. Regular flushing of the 
fuel system, and/or fuel storage containers, 
may be necessary.

6. The use of bio-diesel fuels that do not comply 

with the standards as agreed to by the diesel 
engine manufacturers and the diesel fuel 
injection equipment manufacturers, or bio-
diesel fuels that have degraded as per the 
precautions and concerns above, may affect 
the warranty coverage of your engine. See 
Yanmar Limited Warranty on page vii.

Filling the Fuel Tank

A

 DANGER

FIRE AND EXPLOSION HAZARD!

• Diesel fuel is extremely flammable and 

explosive under certain conditions.

• Only fill the fuel tank with diesel fuel. 

Filling the fuel tank with gasoline may 
result in a fire.

• NEVER refuel with the engine running.

• Wipe up all spills immediately.

• Keep sparks, open flames or any other 

form of ignition (match, cigarette, 
static electric source) away when 
fueling / refueling.

• NEVER overfill the fuel tank.

• Fill the fuel tank and store fuel in a 

well-ventilated area only.

• Failure to comply will result in death or 

serious injury.

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BEFORE YOU OPERATE

LV Operation Manual

31

Note that a typical fuel tank is shown. The fuel 
tank on your engine may be different. Also note 
that the inlet fuel screen is shown removed 
from the fuel tank for clarity. ALWAYS make 
sure the inlet fuel screen remains inside of the 
fuel tank while fueling!

A

 DANGER

FIRE AND EXPLOSION HAZARD!

• Diesel fuel is extremely flammable and 

explosive under certain conditions.

• Be sure to place the diesel fuel 

container on the ground when 
transferring the diesel fuel from the 
pump to the container. Hold the hose 
nozzle firmly against the side of the 
container while filling it. This prevents 
static electricity build-up which could 
cause sparks and ignite fuel vapors.

• NEVER place diesel fuel or other 

flammable material such as oil, hay or 
dried grass close to the engine during 
engine operation or shortly after shut 
down.

• Failure to comply will result in death or 

serious injury.

0000014en

A

 DANGER

FIRE AND EXPLOSION HAZARD!

• Diesel fuel is extremely flammable and 

explosive under certain conditions.

• Before you operate the engine, check 

for fuel leaks. Replace rubberized fuel 
hoses every two years or every 2000 
hours of engine operation, whichever 
comes first, even if the engine has 
been out of service. Rubberized fuel 
lines tend to dry out and become 
brittle after two years or 2000 hours of 
engine operation, whichever comes 
first.

• Failure to comply will result in death or 

serious injury.

0000015en

CAUTION

• Only use diesel fuels recommended by 

Yanmar for the best engine 
performance, to prevent engine 
damage and to comply with EPA / ARB 
warranty requirements.

• Only use clean diesel fuel.

• NEVER remove inlet fuel screen from 

the filler port. If removed, dirt and 
debris could get into the fuel system 
causing it to clog.

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BEFORE YOU OPERATE

32

LV Operation Manual

1. Clean the area around the fuel cap 

(Figure 1, (1)).

2. Remove the fuel cap (Figure 1, (1)) from the 

fuel tank (Figure 1, (3)).

3. Stop fueling when the fuel is at the same level 

as the red ring (Figure 1, (4)) at the bottom of 
the inlet fuel screen. NEVER overfill the fuel 
tank.

4. Replace the fuel cap (Figure 1, (1)) and hand 

tighten. Over-tightening the fuel cap will 
damage it.

Figure 1

ENGINE OIL

Engine Oil Specifications 

Use an engine oil that meets or exceeds the 
following guidelines and classifications:

Service Categories

• API Service Categories CD or higher

• ACEA Service Categories E-3, E-4, and E-5

• JASO Service Category DH-1

Definitions

• API Classification (American Petroleum 

Institute)

• ACEA Classification (Association des 

Constructeurs Européens d’Automobilies)

• JASO (Japanese Automobile Standards 

Organization)

Notes:

1. Be sure the engine oil, engine oil storage 

containers, and engine oil filling equipment 
are free of sediments and water.

0001552B

(1)

(2)

(3)

(4) 

CAUTION

• Only use the engine oil specified. 

Other engine oils may affect warranty 
coverage, cause internal engine 
components to seize, or shorten 
engine life.

• Prevent dirt and debris from 

contaminating the engine oil. Carefully 
clean the oil cap / dipstick and the 
surrounding area before you remove 
the cap.

• NEVER mix different types of engine 

oil. This may adversely affect the 
lubricating properties of the engine oil.

• NEVER overfill. Overfilling may result 

in white exhaust smoke, engine 
overspeed or internal damage.

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BEFORE YOU OPERATE

LV Operation Manual

33

2. Change the engine oil after the first 50 hours 

of operation and then at every 200 hours 
thereafter.

3. Select the oil viscosity based on the ambient 

temperature where the engine is being 
operated. See SAE Service Grade Viscosity 
Chart (Figure 2).

4. Yanmar does not recommend the use of 

engine oil “additives.”

Additional Technical Engine oil 
Requirements:

The engine oil must be changed when the Total 
Base Number (TBN) has been reduced to 2.0. 
TBN (mgKOH/g) test method; JIS K-201-5.2-2 
(HCI), ASTM D4739 (HCI)

Engine Oil Viscosity

Select the appropriate engine oil viscosity based 
on the ambient temperature and use the SAE 
Service Grade Viscosity Chart in Figure 2.

Figure 2

Checking Engine Oil

1. Make sure engine is level.

2. Remove oil cap / dipstick (Figure 3, (1)) from 

either location and wipe with clean cloth.

3. Fully reinsert oil cap / dipstick but do not 

screw in.

4. Remove oil cap / dipstick. The oil level should 

be between upper (Figure 3, (2)) and lower 
(Figure 3, (3)) lines on the oil cap / dipstick.

5. Fully reinsert oil cap / dipstick (Figure 3, (1)) 

and hand tighten. Over-tightening the oil cap / 
dipstick will damage it.

Figure 3

Adding Engine Oil

1. Make sure engine is level.

2. Remove oil cap / dipstick (Figure 3, (1)).

3. Add indicated amount of engine oil at either 

one of the engine oil filler ports 
(Figure 3, (4)).

4. Wait one minute and check oil level.

5. Add more oil if necessary.

6. Fully reinsert oil cap / dipstick (Figure 3, (1)) 

and hand tighten. Over-tightening the oil cap / 
dipstick will damage it.

 -4˚F 14˚F 32˚F 

50˚F 68˚F 86˚F 104˚F

 (-20˚C) (-10˚C) (0˚C) (10˚C) (20˚C) (30˚C) (40˚C)

SAE 10W

SAE 20W

SAE 10W-30

SAE 15W-40

SAE 20

SAE 30

SAE 40

0000005

(1)

(2)

(3)

(4)

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(1)

0001566A