Yanmar engines LV series (L48V, L70V, L100V). Manual - part 22

PERIODIC MAINTENANCE

74

LV Operation Manual

Perform the following maintenance after the initial 
50 hours of operation.

• Replace Engine Oil 

• Clean / Inspect Engine Oil Filter

Replace Engine Oil

After Initial 50 Hours of Operation

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

 WARNING

SUDDEN MOVEMENT HAZARD!

• Allow the engine to warm up for at 

least 5 minutes to allow the engine idle 
speed to return to normal before 
engaging the transmission or any PTO 
attachments. Engaging the 
transmission or PTO at an elevated 
engine speed could result in an 
unexpected movement of the 
equipment. 

• 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.

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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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PERIODIC MAINTENANCE

LV Operation Manual

75

The engine oil on a new engine becomes 
contaminated from the initial break-in of internal 
parts. The initial 50 hour oil change and filter 
cleaning is very important.

Drain the engine oil as follows:

1. Make sure the engine is level.

2. Start the engine and bring it up to operating 

temperature.

3. Stop the engine.

4. Remove the oil cap / dipstick (Figure 3, (1)) to 

allow the engine oil to drain more easily.

Figure 3

5. Position a container under the engine to 

collect waste oil.

6. Remove the drain plug located on the bottom 

of the cylinder block (Figure 3, (2)). Allow oil 
to drain.

7. After all oil has been drained from the engine, 

install the drain plug (Figure 3, (2)) and 
tighten to 14-17 ft lbs (19.6-23.5 N•m, 2.0-2.4 
kgf•m).

8. Dispose of used oil properly.

Clean / Inspect Engine Oil Filter 

Figure 4

Clean / inspect the engine oil filter as follows:

1. Remove the oil filter retaining bolt 

(Figure 4, (1)).

2. Pull the oil filter cap (Figure 4, (2)) out and 

remove the oil filter (Figure 4, (3)).

3. Clean the oil filter or replace if damaged.

4. Install the oil filter (Figure 4, (3)). 

5. Make sure the oil filter cap is fully seated 

(Figure 4, (2)).

6. Install and tighten the oil filter retaining bolt 

(Figure 4, (1)).

7. Add new engine oil to the engine as specified 

in Adding Engine Oil on page 33.

8. Warm up the engine by running it for 5 

minutes and check for any engine oil leaks.

9. After engine is warm, shut it off and let it sit for 

10 minutes.

(1)

(2)

0001119B

(1)

(2)

0001566B

Applicable Engine Oil Filter Part No.

L48V, L70V and L100V

114250-35070

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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(3)

(2) (1)

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PERIODIC MAINTENANCE

76

LV Operation Manual

Figure 5

10. Recheck the engine oil level by fully inserting, 

but not screwing in, the dipstick.

11. Add engine oil (Figure 5, (4)) as needed until 

the level is between the upper (Figure 5, (2)) 
and lower lines (Figure 5, (3)) on the oil cap / 
dipstick (Figure 5, (1)). 

12. Replace the oil cap / dipstick (Figure 5, (1)) 

and tighten by hand. Over-tightening may 
damage the cap. If any engine oil is spilled, 
wipe it away with a clean cloth.

Perform the following maintenance every 50 
hours of operation.

• Clean Inlet Fuel Screen

Clean Inlet Fuel Screen

1. Clean the area around the fuel cap 

(Figure 6, (1)).

2. Remove the fuel cap (Figure 6, (1)) from the 

fuel tank (Figure 6, (2)). 

(1)

(2)

(3)

(4)

0001119A

(1)

0001566A

Every 50 Hours of Operation

A

 DANGER

FIRE AND EXPLOSION HAZARD!

• Diesel fuel is extremely flammable and 

explosive under certain conditions.

• When you remove any fuel system 

component to perform maintenance 
(such as changing the fuel filter) place 
an approved container under the 
opening to catch the fuel.

• NEVER use a shop rag to catch the 

fuel. Vapors from the rag are extremely 
flammable and explosive.

• Wipe up any spills immediately.

• Wear eye protection. The fuel system 

is under pressure and fuel could spray 
out when you remove any fuel system 
component.

• Failure to comply will result in death or 

serious injury.

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PERIODIC MAINTENANCE

LV Operation Manual

77

Figure 6

3. Lift out the inlet fuel screen (Figure 6, (3)).

4. Clean the inlet fuel screen or replace if 

damaged.

5. Install the inlet fuel screen (Figure 6, (3)).

6. Replace the fuel cap (Figure 6, (1)) and hand 

tighten. Overtightening the fuel cap will 
damage it.

Perform the following maintenance every 200 
hours of operation.

• Clean Air Cleaner Element

• Replace Engine Oil and Clean / Inspect 

Engine Oil Filter

• Check Engine Speed Control

• Drain the Fuel Tank and Replace Outlet Fuel 

Filter

Clean Air Cleaner Element

Applicable Inlet Fuel Screen Part No.

L48V, L70V and L100V

114250-55100

0001552A

(1)

(3)

(2)

Every 200 Hours of Operation

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 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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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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