Yanmar engines LV series (L48V, L70V, L100V). Manual - part 6

SAFETY

LV Operation Manual

9

CAUTION

If any problem is noted during the visual 
check, the necessary corrective action 
should be taken before you operate the 
engine.

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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

The illustrations and descriptions of 
optional equipment in this manual, such 
as the operator’s console, are for a 
typical engine installation. Refer to the 
documentation supplied by the optional 
equipment manufacturer for specific 
operation and maintenance instructions.

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CAUTION

If any indicator illuminates during 
engine operation stop the engine 
immediately. Determine the cause and 
repair the problem before you continue 
to operate the engine.

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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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CAUTION

NEVER allow the recoil handle to snap 
back against the engine. Return the 
handle to the starting position gently to 
prevent damage to the starter.

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SAFETY

10

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

• 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 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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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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SAFETY

LV Operation Manual

11

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

New Engine Break In:

• On the initial engine start-up, allow the 

engine to idle for approximately 15 
minutes while you check for proper 
engine oil pressure, diesel fuel leaks, 
engine oil leaks, coolant leaks, and for 
proper operation of the indicators 
and / or gauges.

• During the first hour of operation, vary 

the engine speed and the load on the 
engine. Short periods of maximum 
engine speed and load are desirable. 
Avoid prolonged operation at 
minimum or maximum engine speeds 
and loads for the next 4 to 5 hours.

• During the break-in period, carefully 

observe the engine oil pressure and 
engine temperature.

• During the break-in period, check the 

engine oil and coolant levels 
frequently.

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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

• 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

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

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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SAFETY

12

LV Operation Manual

CAUTION

The tightening torque in the Standard 
Torque Chart (page 64) should be 
carefully observed.

• Apply 60% torque to bolts that are not 

listed. 

• Apply 80% torque when tightened to 

aluminum alloy.

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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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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

• When the engine is operated in dusty 

conditions, clean the air cleaner 
element more frequently.

• NEVER operate the engine with the air 

cleaner or element(s) removed.  This 
may cause foreign material to enter the 
engine and damage it.

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CAUTION

The maximum air intake restriction shall 
be:

• L48V: 0.10 psi (0.69 kPa; 70 mm Aq) or 

less

• L70V: 0.20 psi (1.37 kPa; 140 mm Aq) 

or less

• L100V: 0.21 psi (1.47 kPa; 150 mm Aq) 

or less. 

Clean or replace the air cleaner element 
if the air intake restriction exceeds the 
above mentioned value.

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CAUTION

Tips while starting engine with recoil 
starter (See Start The Engine on 
page 46.):

• Pulling out the recoil starter handle 

too hard or fast will damage the 
equipment.

• ALWAYS pull recoil starter handle all 

the way out or the engine will not start.

• NEVER allow the recoil starter handle 

to snap back against the engine. 
Return the handle to the starting 
position gently to prevent damage to 
the recoil starter.

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