Yanmar engines LV series (L48V, L70V, L100V). Manual - part 18

PERIODIC MAINTENANCE

58

LV Operation Manual

A

 WARNING

SHOCK HAZARD!

• Turn off the battery switch (if 

equipped) or disconnect the negative 
battery cable before servicing the 
electrical system.

• Check the electrical harnesses for 

cracks, abrasions, and damaged or 
corroded connectors. ALWAYS keep 
the connectors and terminals clean. 

• Failure to comply could result in death 

or serious injury.

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A

 WARNING

SEVER HAZARD!

• Stop the engine before you begin to 

service it. 

• NEVER leave the key in the key switch 

when you are servicing the engine. 
Someone may accidentally start the 
engine and not realize you are 
servicing it. This could result in a 
serious injury.

• If you must service the engine while it 

is operating, remove all jewelry, tie 
long hair back, and keep your hands, 
other body parts and clothing away 
from moving / rotating parts.

• Failure to comply could result in death 

or serious injury.

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A

 WARNING

BURN HAZARD!

• If you must drain the engine oil while it 

is still hot, stay clear of the hot engine 
oil to avoid being scalded. Make sure 
you wear eye protection. 

• Failure to comply could result in death 

or serious injury.

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A

 CAUTION

FLYING OBJECT HAZARD!

• ALWAYS wear eye protection when 

servicing the engine and when using 
compressed air or high-pressure 
water. Dust, flying debris, compressed 
air, pressurized water or steam may 
injure your eyes. 

• Failure to comply may result in minor 

or moderate injury.

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PERIODIC MAINTENANCE

LV Operation Manual

59

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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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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CAUTION

• NEVER attempt to modify the engine’s 

design or safety features such as 
defeating the engine speed limit 
control or the fuel injection quantity 
control.

• Failure to comply may impair the 

engine’s safety and performance 
characteristics and shorten the 
engine’s life. Any alterations to this 
engine may affect the warranty 
coverage of your engine. See Yanmar 
Limited Warranty on page vii.

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CAUTION

Observe the following environmental 
operating conditions to maintain engine 
performance and avoid premature 
engine wear:

• Avoid operating in extremely dusty 

conditions.

• Avoid operating in the presence of 

chemical gases or fumes.

• Avoid operating in a corrosive 

atmosphere such as salt water spray.

• NEVER install the engine in a 

floodplain unless proper precautions 
are taken to avoid being subject to a 
flood.

• NEVER expose the engine to the rain.

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PERIODIC MAINTENANCE

60

LV Operation Manual

CAUTION

Observe the following environmental 
operating conditions to maintain engine 
performance and avoid premature 
engine wear:

• NEVER run the engine if the ambient 

temperature is above +104°F (+40°C) 
or below +14°F (-10°C)

◆

If the ambient temperature exceeds 
+104°F (+40°C) the engine may 
overheat and cause the engine oil to 
break down.

◆

If the ambient temperature falls 
below +14°F (-10°C) rubber 
components such as gaskets and 
seals will harden causing premature 
engine wear and damage.

◆

Contact your authorized Yanmar 
industrial engine dealer or 
distributor if the engine will be 
operated in either temperature 
extreme.

• Contact your authorized Yanmar 

industrial engine dealer or distributor 
if you need to operate the engine at 
high altitudes. At high altitudes the 
engine will lose power, run rough, and 
produce exhaust gases that exceed 
the design specifications.

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CAUTION

NEVER hold the key in the START 
position for longer than 15 seconds or 
the starter motor will overheat.

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CAUTION

For maximum engine life, Yanmar

 

recommends that when shutting the 
engine down, you allow the engine to 
idle, without load, for 5 minutes. This 
will allow the engine components that 
operate at high temperatures, such as 
the turbocharger (if equipped) and 
exhaust system, to cool slightly before 
the engine itself is shut down.

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CAUTION

NEVER use an engine starting aid such 
as ether. Engine damage will result.

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CAUTION

Make sure the engine is installed on a 
level surface. If a continuously running 
engine is installed at an angle greater 
than 20° (in any direction) or if an engine 
runs for short periods of time (less than 
3 minutes) at an angle greater than 25° 
in any direction, engine oil may enter the 
combustion chamber causing exessive 
engine speed and generate white 
smoke. This may cause serious engine 
damage.

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CAUTION

• NEVER overfill the engine with engine 

oil.

• ALWAYS keep the oil level between the 

upper and lower lines on the oil 
cap / dipstick.

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PERIODIC MAINTENANCE

LV Operation Manual

61

CAUTION

It is important to perform daily checks. 
See Daily Checks on page 34.

Periodic maintenance prevents 
unexpected downtime, reduces the 
number of accidents due to poor 
machine performance and helps extend 
the life of the engine.

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CAUTION

NEVER engage the starter motor while 
the engine is running. This may damage 
the starter motor pinion and / or ring 
gear.

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CAUTION

Protect the air cleaner, turbocharger (if 
equipped) and electric components 
from damage when you use steam or 
use high-pressure water to clean the 
engine.

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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.

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CAUTION

Establish a periodic maintenance plan 
according to the engine application and 
make sure you perform the required 
periodic maintenance at intervals 
indicated. Failure to follow these 
guidelines will impair the engine’s safety 
and performance characteristics, 
shorten the engine’s life and may affect 
the warranty coverage on your engine. 
See Yanmar Limited Warranty on 
page vii.

Consult your authorized Yanmar 
industrial engine dealer or distributor for 
assistance when checking items marked 
with a  .

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