2002 YAMAHA WR 250F oil filter

3 - 14
INSP
ADJ
10. Install:
Air filter element 1
Washer
Fitting bolt
NOTE:
Align the projection a on filter guide with the
hole b in air filter case.
T R..2 Nm (0.2 m · kg, 1.4 ft · lb)
ENGINE OIL LEVEL INSPECTION
1. Start the engine, warm it up for several
minutes, and then turn off the engine and
wait for five minutes.
2. Place the machine on a level place and
hold it up on upright position by placing
the suitable stand under the engine.
3. Remove:
Oil tank cap 1
4. Inspect:
Oil level
Oil level should be between maximum
a and minimum b marks.
Oil level is low → Add oil to proper
level.
NOTE:
When inspecting the oil level, do not screw the
oil tank cap into the oil tank. Insert the gauge
lightly.
ENGINE OIL LEVEL INSPECTION

3 - 16
INSP
ADJ
ENGINE OIL REPLACEMENT
ENGINE OIL REPLACEMENT
1. Start the engine and warm it up for sev-
eral minutes, and then turn off the engine
and wait for five minute.
2. Place the machine on a level place and
hold it on upright position by placing the
suitable stand under the engine.
3. Place a suitable container under the
engine.
4. Remove:
Oil tank cap 1
Frame oil drain bolt 2
Crankcase oil drain bolt 3
Oil filter element drain bolt 4
Drain the crankcase and oil tank
(frame) of its oil.
5. Remove:
Lower engine bracket
Oil hose clamp 1
Bolt (oil hose) 2
Oil hose 3
Oil strainer (frame) 4
6. Inspect:
Oil strainer (frame)
Clogged → Blow.

3 - 17
INSP
ADJ
ENGINE OIL REPLACEMENT
7. If the oil filter is to be replaced during this
oil change, remove the following parts
and reinstall them.
8. Install:
Copper washer 1
Oil strainer (frame) 2
Oil hose 3
Bolt (oil hose) 4
Oil hose clamp 5
Lower engine bracket
9. Install:
Copper washer
Oil filter element drain bolt
Crankcase oil drain bolt
Frame oil drain bolt
10. Fill:
Engine oil
11. Check:
Oil leakage
12. Install:
Oil tank cap
13. Check:
Engine oil level Replacement steps:
Remove the oil filter element cover 1 and
oil filter element 2.
Check the O-rings 3, if cracked or dam-
aged, replace them with a new one.
Install the oil filter element and oil filter ele-
ment cover.
T R..
Oil filter element cover:
10 Nm (1.0 m • kg, 7.2 ft • lb)
Oil quantity:
Total amount:
1.7 L (1.50 Imp qt, 1.80 US qt)
Periodic oil change:
1.5 L (1.32 Imp qt, 1.59 US qt)
With oil filter replacement:
1.6 L (1.41 Imp qt, 1.69 US qt)
T R..90 Nm (9.0 m · kg, 65 ft · lb)
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
T R..2 Nm (0.2 m · kg, 1.4 ft · lb)
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
T R..20 Nm (2.0 m · kg, 14 ft · lb)
T R..23 Nm (2.3 m · kg, 17 ft · lb)

4 - 57
ENG

OIL FILTER ELEMENT, WATER PUMP AND RIGHT
CRANKCASE COVER
OIL FILTER ELEMENT, WATER PUMP AND RIGHT
CRANKCASE COVER
Extent of removal:
1
Oil filter element removal
2
Water pump removal
3
Right crankcase cover removal
Extent of removal Order Part name Q’ty Remarks
OIL FILTER ELEMENT, WATER
PUMP AND RIGHT CRANK-
CASE COVER REMOVAL
Preparation for removal Drain the engine oil. Refer to “ENGINE OIL REPLACEMENT”
section in the CHAPTER 3.
Drain the coolant. Refer to “COOLANT REPLACEMENT”
section in the CHAPTER 3.
Radiator hose 3 Disconnect at water pump side.
Exhaust pipe Refer to “EXHAUST PIPE AND
SILENCER” section.
Brake pedal Refer to “ENGINE REMOVAL” section.
Right engine guard
1 Oil filter element cover 1
2 Oil filter element 1
13

4 - 58
ENG

OIL FILTER ELEMENT, WATER PUMP AND RIGHT
CRANKCASE COVER
Extent of removal Order Part name Q’ty Remarks
3 Water pump housing 1
4 Oil delivery pipe 1
5 Bolt (oil hose) 1
6 Kickstarter crank 1
7 Right crankcase cover 1
8 Impeller 1
Refer to “REMOVAL POINTS”. 9 Washer 1
10 Impeller shaft 1
11 Oil seal 2
12Bearing
1
3
2

4 - 59
ENG

OIL FILTER ELEMENT, WATER PUMP AND RIGHT
CRANKCASE COVER
REMOVAL POINTS
Impeller shaft
1. Remove:

Impeller
1


Washer
2


Impeller shaft
3

NOTE:

Hold the impeller shaft on its width across the
flats
a
with spanners, etc. and remove the
impeller.
EC4G3210
Oil seal
NOTE:

It is not necessary to disassemble the water
pump, unless there is an abnormality such as
excessive change in coolant level, discolora-
tion of coolant, or milky transmission oil.
1. Remove:

Bearing
1

2. Remove:

Oil seal
1

INSPECTION
Oil delivery pipe
1. Inspect:

Oil delivery pipe
1

Bend/damage
→
Replace.
Clogged
→
Blow.

4 - 60
ENG

OIL FILTER ELEMENT, WATER PUMP AND RIGHT
CRANKCASE COVER
EC444200
Impeller shaft
1. Inspect:

Impeller shaft
1

Bend/wear/damage
→
Replace.
Fur deposits
→
Clean.
EC444300
Impeller shaft gear
1. Inspect:

Gear teeth
a

Wear/damage
→
Replace.
EC4H4600
Bearing
1. Inspect:

Bearing
Rotate inner race with a finger.
Rough spot/seizure → Replace.
EC444400
Oil seal
1. Inspect:
Oil seal 1
Wear/damage → Replace.
ASSEMBLY AND INSTALLATION
Oil seal
1. Install:
Oil seal 1
NOTE:
Apply the lithium soap base grease on the oil
seal lip.
Install the oil seal with its manufacture’s
marks or numbers facing the right crankcase
cover 2.

4 - 61
ENG

OIL FILTER ELEMENT, WATER PUMP AND RIGHT
CRANKCASE COVER
2. Install:

Bearing
1

NOTE:

Install the bearing by pressing its outer race
parallel.
Impeller shaft
1. Install:

Impeller shaft
1


Washer
2


Impeller
3

NOTE:


Take care so that the oil seal lip is not dam-
aged or the spring does not slip off its posi-
tion.

When installing the impeller shaft, apply the
lithium soap base grease on the oil seal lip
and impeller shaft. And install the shaft while
turning it.

Hold the impeller shaft on its width across
the flats
a
with spanners, etc. and install the
impeller.
T R..14 Nm (1.4 m · kg, 10 ft · lb)

Right crankcase cover
1. Install:

Dowel pin
1


O-ring
2


Collar
3


Gasket
4

NOTE:

Apply the lithium soap base grease on the O-
ring.