2008 YAMAHA WOLVERINE 450 Owners Manual

8-22
8

Make sure that no foreign material enters thecrankcase.
13. Start the engine, and then let it idle for several
minutes while checking it for oil leakage. If oil
is leaking, immediately turn the engine off and
check for the cause.
14. Turn the engine off, wait at least ten minutes,
and then check the oil level and correct it if
necessary.
15. Install panel D.EBU23381Final gear oil The final gear case must be checked for oil leak-
age before each ride. If any leakage is found, have
a Yamaha dealer check and repair the ATV. In ad-
dition, the final gear oil level must be checked and
the oil changed as follows at the intervals specified
in the periodic maintenance and lubrication chart.
To check the final gear oil level
1. Place the ATV on a level surface.NOTE:The final gear oil level must be checked on a coldengine.2. Remove the final gear oil filler bolt, and then
check the oil level in the final gear case.
NOTE:The oil level should be at the brim of the filler hole.
3. If the oil is below the brim of the filler hole, add
sufficient oil of the recommended type to raise
it to the correct level.
4. Install the oil filler bolt, and then tighten it to the
specified torque.1. Final gear oil
2. Final gear oil filler bolt
3. Correct oil level
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8-23
8To change the final gear oil
1. Remove the final gear case guard by remov-
ing the bolts.
2. Place the ATV on a level surface.
3. Place an oil pan under the final gear case to
collect the used oil.
4. Remove the final gear oil filler bolt and the fi-
nal gear oil drain bolt to drain the oil from the
final gear case.5. Install the drain bolt, and then tighten it to the
specified torque.
6. Add the recommended final gear oil to the
brim of the filler hole as shown. Tightening torque:
Final gear oil filler bolt:
23 Nm (2.3 m·kgf, 17 ft·lbf)
1. Final gear case guard
2. Bolt
1. Final gear oil drain boltTightening torque:
Final gear oil drain bolt:
23 Nm (2.3 m·kgf, 17 ft·lbf)
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8-24
8
CAUTION:ECB00420Be sure no foreign material enters the finalgear case.
7. Install the oil filler bolt, and then tighten it to the
specified torque.8. Check the final gear case for oil leakage. If oil
is leaking, check for the cause.
9. Install the final gear case guard by installing
the bolts and tightening them to the specified
torque.
EBU23431Changing the differential gear oil The differential gear case must be checked for oil
leakage before each ride. If any leakage is found,
have a Yamaha dealer check and repair the ATV.
In addition, the differential gear oil must be
changed as follows at the intervals specified in the
periodic maintenance and lubrication chart.
1. Place the ATV on a level surface.
2. Place an oil pan under the differential gear
case to collect the used oil.
1. Final gear oil
2. Final gear oil filler bolt
3. Correct oil levelRecommended final gear oil:
See page 10-1.
Tightening torque:
Final gear oil filler bolt:
23 Nm (2.3 m·kgf, 17 ft·lbf)
Tightening torque:
Final gear case guard bolt:
16 Nm (1.6 m·kgf, 11 ft·lbf)
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8-25
83. Remove the differential gear oil filler bolt and
the differential gear oil drain bolt to drain the
oil from the differential gear case.
4. Install the drain bolt, and then tighten it to the
specified torque.
5. Add the specified amount of the recommend-
ed differential gear oil.
NOTE:
Do not exceed the specified differential gear oil
quantity when filling. Overfilling will cause the oil
to seep out of the breather hose during and after
riding.
1. Differential gear oil filler bolt
1. Differential gear oil drain boltTightening torque:
Differential gear oil drain bolt:
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
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8-26
8

The differential gear case capacity is greater
than the recommended oil quantity, therefore
the oil level cannot be accurately checked fromthe oil filler hole.CAUTION:ECB00410Be sure no foreign material enters the differen-tial gear case.
6. Install the oil filler bolt, and then tighten it to the
specified torque.
7. Check the differential gear case for oil leak-
age. If oil is leaking, check for the cause.
EBU23470Coolant The coolant level should be checked before each
ride. In addition, the coolant must be changed at
the intervals specified in the periodic maintenance
and lubrication chart.EBU27940To check the coolant level
1. Place the ATV on a level surface.NOTE:The coolant level must be checked on a cold en-
gine since the level varies with engine tempera-ture.
2. Check the coolant level in the coolant reser-
voir.NOTE:The coolant should be between the minimum andmaximum level marks. Recommended differential gear oil:
See page 10-1.
Oil quantity:
0.35 L (0.37 US qt) (0.31 Imp.qt)
Tightening torque:
Differential gear oil filler bolt:
23 Nm (2.3 m·kgf, 17 ft·lbf)
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8-27
83. If the coolant is at or below the minimum level
mark, remove the reservoir cap, add coolant
or distilled water to the maximum level mark,
and then install the reservoir cap.
CAUTION:ECB00401
If coolant is not available, use distilled water
or soft tap water instead. Do not use hard wa-
ter or salt water since it is harmful to the en-
gine.
If water has been used instead of coolant, re-
place it with coolant as soon as possible,
otherwise the cooling system will not be pro-
tected against frost and corrosion.
1. Maximum level mark
2. Minimum level mark
1. Coolant reservoir capCoolant reservoir capacity (up to the maximum
level mark):
0.25 L (0.26 US qt) (0.22 Imp.qt)
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8

If water has been added to the coolant, have
a Yamaha dealer check the antifreeze con-
tent of the coolant as soon as possible, oth-
erwise the effectiveness of the coolant willbe reduced.
NOTE:
The radiator fan is automatically switched on or
off according to the coolant temperature in the
radiator.
If the engine overheats, see page 8-56 for fur-ther instructions.EBU26441To change the coolant
WARNING
EWB01890Wait for the engine and radiator to cool before
removing the radiator cap. You could be
burned by hot fluid and steam blown out under
pressure. Always place a thick rag over the cap
when opening. Allow any remaining pressureto escape before completely removing the cap.
1. Place the ATV on a level surface.
2. Remove panels C and D. (See page 8-9.)3. Place a container under the engine, and then
remove the coolant drain bolt. (Use a trough
or a similar object as shown to prevent coolant
from spilling on the footrest.)
1. Coolant drain bolt
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8-29
84. Remove cowling A. (See page 8-9.)
5. Remove the radiator cap.6. Remove the coolant reservoir cap.
7. Disconnect the hose on the coolant reservoir
side, and then drain the coolant from the cool-
ant reservoir.
8. After draining the coolant, thoroughly flush the
cooling system with clean tap water.
9. Replace the coolant drain bolt washer if it is
damaged, install the coolant drain bolt, and
then tighten it to the specified torque.
1. Trough
1. Radiator cap
1. Coolant reservoir hoseTightening torque:
Coolant drain bolt:
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
U3C262E0.book Page 29 Tuesday, June 26, 2007 3:36 PM