Yanmar engines LV series (L48V, L70V, L100V). Manual - part 20

PERIODIC MAINTENANCE

66

LV Operation Manual

: Check

 

: Replace

 

: Contact your authorized Yanmar industrial engine dealer or distributor for these maintenance services.

System

Check Item

Daily

Periodic Maintenance Interval

Every 50

hours

Every 200

hours

Every 400

hours

Every 

1000

hours

Every 

1500 

hours

Every 

2000

hours

Air Intake

Clean or Replace Air 
Cleaner Element - May 
Need More Frequent 
Service in Dusty Conditions

Cylinder Head

Adjust Intake / Exhaust 
Valve Clearance

Check Compression

Electrical 
Equipment

Check Battery & Add Water 
as Necessary

before 

operation

Check Battery Indicator (If 
Equipped) and Other Driven 
Machine Indicators (If 
Equipped)

when 

engine is 

started

Emission Control 
Warranty

Inspect, Clean & Test Fuel 
Injection Nozzle

Engine Oil

Check Engine Oil Level & 
Add Engine Oil As 
Necessary

before 

operation

Drain and Refill Engine Oil

1st time

2nd & after

Clean Engine Oil Filter - 
Replace If Damaged

2nd & after

Check for Engine Oil 
Leakage

before & 

after 

operation

Engine Speed 
Control

Check for Proper Operation
Verify Adjustment

1st time

2nd & after

Exhaust System

Check Spark Arrestor for 
Clogging

before 

operation

Fuel

Check Fuel Tank Level & 
Add Fuel As Necessary

before 

operation

Drain & Clean Fuel Tank

 

Clean Inlet Fuel Screen

 

Replace Outlet Fuel Filter

 

Check for Fuel Leakage

before & 

after 

operation

Hoses

Replace Fuel System 
Hose(s)

 

or every 2 

yrs. 

whichever 

comes first

PERIODIC MAINTENANCE

LV Operation Manual

67

PERIODIC MAINTENANCE 
PROCEDURES

Perform the following maintenance daily before 
operation.

• Check Battery (If Equipped)

• Check Battery Indicator (If Equipped)

• Check Engine Oil Level

• Check For Engine Oil Leakage

• Check Engine Speed Control (First Time 

Only)

• Check Spark Arrestor (If Equipped)

• Check Fuel Level

• Check For Fuel Leakage

Check Battery (If Equipped)

Daily, Before Operation

A

 DANGER

EXPLOSION HAZARD!

• NEVER check the remaining battery 

charge by shorting out the terminals. 
This will result in a spark and may 
cause an explosion or fire. Use a 
hydrometer to check the remaining 
battery charge.

• If the electrolyte is frozen, slowly warm 

the battery before you recharge it.

• Failure to comply will result in death or 

serious injury.

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A

 WARNING

BURN HAZARD!

• Batteries contain sulfuric acid. NEVER 

allow battery fluid to come in contact 
with clothing, skin or eyes. Severe 
burns could result. ALWAYS wear 
safety goggles and protective clothing 
when servicing the battery. If contact 
with the skin and / or eyes should 
occur, flush with a large amount of 
water and obtain prompt medical 
treatment. 

• Failure to comply could result in death 

or serious injury.

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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.

0000013en

PERIODIC MAINTENANCE

68

LV Operation Manual

Figure 1

• When the amount of fluid nears the lower limit 

(Figure 1, (1)), fill with distilled water 
(Figure 1, (2)) so it is at the upper limit 
(Figure 1, (3)). If operation continues with 
insufficient battery fluid, the battery life is 
shortened, and the battery may overheat and 
explode. During the summer, check the fluid 
level more often than specified.

• If the engine cranking speed is so slow that 

the engine does not start, recharge the 
battery.

• If the engine still will not start after charging, 

have your authorized Yanmar industrial 
engine dealer or distributor check the battery 
and the engine’s starting system.

If operating the machine where the ambient 
temperature could drop to 14°F (-10°C) or less, 
remove the battery from the machine at the end 
of the day. Store the battery in a warm place until 
the next use. This will help start the engine easily 
at low ambient temperatures.

Check Battery Indicator (If 
Equipped)

Visually check the battery indicator (if equipped) 
and any other indicator provided by the driven 
machine manufacturer. See Indicators and 
Controls – Electric Starter on page 21.

Check Engine Oil Level

Before you operate the engine check the engine 
oil level. See Checking Engine Oil on page 33.

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(1)

(2)

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.

0000005en

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

PERIODIC MAINTENANCE

LV Operation Manual

69

Check For Engine Oil Leakage

Before you operate 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.

Check Engine Speed Control (First 
Time Only)

Before you operate the driven machine for the first 
time check the engine speed control. See the 
instructions for your driven machine for proper 
adjustments.

1. Check the engine speed control for smooth 

operation and lubricate or clean as necessary.

2. Check engine speed control for proper 

adjustments.

Check Spark Arrestor (If Equipped)

A clogged spark arrestor hinders exhaust gas flow 
which reduces engine output, increases fuel 
consumption, and makes starting difficult. Clean 
the spark arrestor regularly.

Clean the spark arrestor (Figure 2, (1)) as follows:

1. Remove the locknut (Figure 2, (2)), end cap 

(Figure 2, (3)) and diffuser discs (Figure 2, (4)) 
from the spark arrestor.

Figure 2

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

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

(1)

(4)

(3)

(2)

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