Yanmar engines LV series (L48V, L70V, L100V). Manual - part 21

PERIODIC MAINTENANCE

70

LV Operation Manual

2. Clean any carbon deposits from the spark 

arrestor.

3. Install the diffuser discs (Figure 2, (4)) and 

end cap (Figure 2, (3)) on the spark arrestor 
(Figure 2, (1)) and secure with the locknut 
(Figure 2, (2)).

Check Fuel Level

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.

0000005en

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.

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PERIODIC MAINTENANCE

LV Operation Manual

71

Before you operate the engine check the fuel 
level. See Filling the Fuel Tank on page 30.

Check For Fuel Leakage

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.

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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.

0000004enLV

A

 WARNING

HIGH PRESSURE HAZARD!

• Avoid skin contact with the high 

pressure diesel fuel spray caused by a 
fuel system leak such as a broken fuel 
injection line. High pressure fuel can 
penetrate your skin and result in 
serious injury. If you are exposed to 
high pressure fuel spray, obtain 
prompt medical treatment.

• NEVER check for a fuel leak with your 

hands. ALWAYS use a piece of wood 
or cardboard. Have your authorized 
Yanmar industrial engine dealer or 
distributor repair the damage.

• Failure to comply could result in death 

or serious injury.

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A

 WARNING

BURN HAZARD!

• Keep your hands and other body parts 

away from hot engine surfaces such 
as the muffler, exhaust pipe, 
turbocharger (if equipped) and engine 
block during operation and shortly 
after you shut the engine down. These 
surfaces are extremely hot while the 
engine is operating and could 
seriously burn you. 

• Failure to comply could result in death 

or serious injury.

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PERIODIC MAINTENANCE

72

LV Operation Manual

Before you operate the engine check for any fuel 
leaks. NEVER use your hands! If you discover a 
fuel leak see your authorized Yanmar industrial 
engine dealer or distributor to repair the engine.

• Check For Engine Oil Leakage

• Check For Fuel Leakage

Check For Engine Oil Leakage

After you shut down the engine check for any 
engine oil leaks. If you discover an engine oil leak 
see your authorized Yanmar industrial engine 
dealer or distributor to repair the engine.

CAUTION

Be environmentally responsible. Follow 
these procedures for hazardous waste 
disposal. Failure to follow these 
procedures may seriously harm the 
environment.

• Follow the guidelines of the EPA or 

other governmental agency for the 
proper disposal of hazardous 
materials such as engine oil, diesel 
fuel and engine coolant. Consult the 
local authorities or reclamation facility.

• NEVER dispose of hazardous 

materials irresponsibly by dumping 
them into a sewer, on the ground or 
into ground water or waterways.

0000013en

Daily, After Operation

A

 WARNING

BURN HAZARD!

• Keep your hands and other body parts 

away from hot engine surfaces such 
as the muffler, exhaust pipe, 
turbocharger (if equipped) and engine 
block during operation and shortly 
after you shut the engine down. These 
surfaces are extremely hot while the 
engine is operating and could 
seriously burn you. 

• Failure to comply could result in death 

or serious injury.

0000015en

PERIODIC MAINTENANCE

LV Operation Manual

73

Check For Fuel Leakage

After you shut down the engine check for any fuel 
leaks. NEVER use your hands! If you discover a 
fuel leak see your authorized Yanmar industrial 
engine dealer or distributor to repair the engine.

A

 WARNING

HIGH PRESSURE HAZARD!

• Avoid skin contact with the high 

pressure diesel fuel spray caused by a 
fuel system leak such as a broken fuel 
injection line. High pressure fuel can 
penetrate your skin and result in 
serious injury. If you are exposed to 
high pressure fuel spray, obtain 
prompt medical treatment.

• NEVER check for a fuel leak with your 

hands. ALWAYS use a piece of wood 
or cardboard. Have your authorized 
Yanmar industrial engine dealer or 
distributor repair the damage.

• Failure to comply could result in death 

or serious injury.

0000008en

A

 WARNING

BURN HAZARD!

• Keep your hands and other body parts 

away from hot engine surfaces such 
as the muffler, exhaust pipe, 
turbocharger (if equipped) and engine 
block during operation and shortly 
after you shut the engine down. These 
surfaces are extremely hot while the 
engine is operating and could 
seriously burn you. 

• Failure to comply could result in death 

or serious injury.

0000015en

CAUTION

Be environmentally responsible. Follow 
these procedures for hazardous waste 
disposal. Failure to follow these 
procedures may seriously harm the 
environment.

• Follow the guidelines of the EPA or 

other governmental agency for the 
proper disposal of hazardous 
materials such as engine oil, diesel 
fuel and engine coolant. Consult the 
local authorities or reclamation facility.

• NEVER dispose of hazardous 

materials irresponsibly by dumping 
them into a sewer, on the ground or 
into ground water or waterways.

0000013en