2013 YAMAHA GRIZZLY 550 Owners Manual

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8
18. Loosen the cylinder head air bleed bolt, with-
out removing it, to allow all of the air to escape
from the air bleed bolt hole. 19. When coolant begins to flow out of the bolt
hole, tighten the cylinder head air bleed bolt to
the specified torque.
20. Start the engine and let it idle for ten minutes.
21. Rev the engine five times.
22. Pour the recommended coolant into the radia- tor until it is full.
1. V-belt cooling duct
2. Clamp screw
1. Cylinder head air bleed boltTightening torque:Cylinder head air bleed bolt:10 Nm (1.0 m·kgf, 7.2 ft·lbf)
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823. Stop the engine and allow it to cool. If the cool-
ant level has dropped after the engine has
cooled, add sufficient coolant until it reaches
the top of the radiator, and then install the ra-
diator cap.
24. Start the engine, and then check for coolant leakage.
TIPIf any leakage is found, have a Yamaha dealer
check the cooling system.25. Install the V-belt cooling duct, and then tightenthe clamp screw.
26. Install the footboard by installing the bolts and nuts, and then tighten them to the specified
torques.
TIPTighten footboard bolts B in the order shown.1. Footboard nut
2. Footboard bolt A
3. Footboard bolt B
3
1
2
1
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8
27. Install the panels.
EBU27806Cleaning the air filter element The air filter element should be cleaned at the in-
tervals specified in the periodic maintenance and
lubrication chart. Clean or, if necessary, replace
the air filter element more frequently if you are
riding in unusually wet or dusty areas.TIPThere are two check hoses at the bottom of the air
filter case, which are located behind panels D and
E. (See page 8-10 for an explanation on removing
the panels.) Check the hoses periodically and, if
dust or water collects in them, empty them and
clean the air filter element and air filter case.
Tightening torques: Footboard nut:4.0 Nm (0.40 m·kgf, 2.9 ft·lbf)
Footboard bolt A: 4.0 Nm (0.40 m·kgf, 2.9 ft·lbf)
Footboard bolt B: 7 Nm (0.7 m·kgf, 5.1 ft·lbf)
4
1
2
3
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81. Place the ATV on a level surface.
2. Remove panel C. (See page 8-10.) 3. Remove the air filter case cover by unhooking
the holders.
4. Remove the sponge material and the air filter mesh from the air filter case.
1. Air filter case check hose
1. Air filter case check hose
1. Air filter case cover holder
2. Air filter case cover
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8
5. Clean the mesh with solvent, and then wipe the solvent off. 6. Wash the sponge material gently, but thor-
oughly, in solvent. WARNING! Always use
parts cleaning solvent to clean the sponge
material. Never use low-flash-point sol-
vents or gasoline to clean the sponge ma-
terial because the engine could catch fire
or explode.
[EWB01941]
7. Squeeze the excess solvent out of the sponge material and let it dry. NOTICE: Do not twist
the sponge material when squeezing it.
[ECB00441]
8. Check the sponge material and replace it if damaged.
9. Apply Yamaha foam air filter oil or other qual- ity foam air filter oil to the sponge material.
1. Sponge material
2. Air filter meshU1HS61E0.book Page 41 Wednesday, May 23, 2012 5:24 PM

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8
TIPThe sponge material should be wet but not drip-
ping.10. Install the mesh and the sponge material intothe air filter case. NOTICE: Make sure that
the air filter element is properly seated in
the air filter case. Never operate the engine
with the air filter element removed. This
will allow unfiltered air to enter the engine,
causing rapid engine wear and possible
engine damage. Additionally, operation
without the air filter element will affect the
fuel injection system with subsequent
poor performance and possible engine
overheating.
[ECB00761]
11. Insert the projections on the air filter case cov- er into the holders on the air filter case, and
then install the air filter case cover by hooking
the holders onto the cover. 12. Place the hoses in their original position as
shown.
1. Air filter case cover
1. Hose
1
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8
13. Install the panel.
TIPThe air filter element should be cleaned every 20–
40 hours. It should be cleaned and lubricated more
often if the ATV is operated in extremely dusty ar-
eas. Each time the air filter element maintenance
is performed, check the air inlet of the air filter case
for obstructions. Check the air filter case rubber
joint to the throttle body and the rubber joint mani-
fold fittings for an air-tight seal. Tighten all fittings
securely to avoid the possibility of unfiltered air en-
tering the engine.EBU27813Cleaning the spark arrester Select a well-ventilated area free of combustible
materials and make sure the exhaust and muffler
are cool.
1. Remove the tailpipe bolts. 2. Remove the tailpipe by pulling it out of the
muffler, and then remove the gasket.
3. Tap the tailpipe lightly, and then use a wire brush to remove any carbon deposits from the
spark arrester portion of the tailpipe and inside
of the tailpipe housing.
1. Tailpipe bolt
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84. Check the gasket for damage, and replace it if
necessary.
5. Install the gasket, and then insert the tailpipe into the muffler and align the bolt holes.
6. Install the bolts and tighten them to the speci- fied torque.
7. Remove the purging bolt and its gasket. 8. Start the engine and rev it up approximately
twenty times while momentarily creating ex-
haust system back pressure by blocking the
end of the muffler with a shop towel.
9. Stop the engine and allow the exhaust pipe to cool.
10. Check the gasket for damage, and replace it if necessary.
11. Install the purging bolt and its gasket, and then tighten the bolt to the specified torque.
1. Tailpipe
2. Spark arrester
3. GasketTightening torque:Tailpipe bolt:10 Nm (1.0 m·kgf, 7.2 ft·lbf)
1. Purging bolt
2. Gasket
2
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