2007 YAMAHA GRIZZLY 660 torque

8-2
8The service information included in this manual
and the tools provided in the owner’s tool kit are in-
tended to assist you in the performance of preven-
tive maintenance and minor repairs. However,
additional tools such as a torque wrench may be
necessary to perform certain maintenance work
correctly.
NOTE:If you do not have the tools or experience required
for a particular job, have a Yamaha dealer performit for you.
WARNING
EWB01850Never modify this ATV through improper in-
stallation or use of accessories, as it may
cause changes in handling, which in some sit-
uations could lead to an accident. All parts and
accessories added to this ATV should be gen-
uine Yamaha or equivalent components de-
signed for use on this ATV and should be
installed and used according to instructions. If
you have questions, consult an authorizedYamaha ATV dealer.U2C661E0.book Page 2 Thursday, March 16, 2006 10:45 AM

8-12
8To install the panel
1. Place the panel in the original position and in-
stall the quick fasteners.
2. Install the front carrier by installing the bolts
and tightening them to the specified torques.
3. Install the stay covers.Panel E
To remove the panel
Remove the bolts, and then take the panel off.
To install the panelPlace the panel in the original position and install
the bolts.
Panel F
To remove the panelPull outward on the areas shown.
1. Quick fastener
2. Panel CTightening torques:
Carrier bolt (top):
26 Nm (2.6 m·kgf, 19 ft·lbf)
Carrier bolt (under fenders):
7 Nm (0.7 m·kgf, 5.1 ft·lbf)
1. Panel E
2. Bolt
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8-14
83. Remove the seat under bracket and the panel
by pulling them off.
To install the panel
1. Place the panel and the seat under bracket in
the original position.
2. Install the rear carrier by installing the bolts
and tightening them to the specified torques.
3. Install the seat.
1. Carrier bolt (under the fenders)
1. Seat under bracket
2. Panel GTightening torques:
Carrier bolt (top):
26 Nm (2.6 m·kgf, 19 ft·lbf)
Carrier bolt (under fenders):
7 Nm (0.7 m·kgf, 5.1 ft·lbf)
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8-16
82. Check the spark plug for electrode erosion
and excessive carbon or other deposits, and
replace it if necessary.
To install the spark plug
1. Measure the spark plug gap with a wire thick-
ness gauge and, if necessary, adjust the gap
to specification.
2. Clean the surface of the spark plug gasket
and its mating surface, and then wipe off any
grime from the spark plug threads.
3. Install the spark plug with the spark plug
wrench, and then tighten it to the specified
torque. Specified spark plug:
NGK/DPR8EA-9
Spark plug gap:
0.8–0.9 mm (0.031–0.035 in)
1. Spark plug gapTightening torque:
Spark plug:
17.5 Nm (1.75 m·kgf, 12.7 ft·lbf)
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8-17
8
NOTE:If a torque wrench is not available when installing
a spark plug, a good estimate of the correct torque
is 1/4–1/2 turn past finger tight. However, the spark
plug should be tightened to the specified torque assoon as possible.
4. Install the spark plug cap.
5. Install the panel.EBU23321Engine oil and oil filter cartridge The engine oil level should be checked before
each ride. In addition, the oil must be changed and
the oil filter cartridge replaced at the intervals spec-
ified in the periodic maintenance and lubrication
chart.
To check the engine oil level
1. Remove panel F. (See page 8-8.)
2. Place the ATV on a level surface.
3. Start the engine, warm it up for several min-
utes, and then turn it off.
4. Wait a few minutes until the oil settles before
checking.
5. Remove the engine oil filler cap, and then
wipe the dipstick off with a clean rag.6. Insert the dipstick into the filler hole (without
screwing it in), and then remove it again to
check the oil level.
1. Engine oil filler cap
2. Dipstick
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8-19
8
NOTE:Skip steps 6–10 if the oil filter cartridge is not beingreplaced.
6. Remove panels D and E. (See page 8-8.)
7. Remove the oil filter cartridge with an oil filter
wrench.NOTE:An oil filter wrench is available at a nearby Yamahadealer.
8. Apply a thin coat of engine oil to the O-ring of
the new oil filter cartridge.
NOTE:Make sure that the O-ring is properly seated.
9. Install the new oil filter cartridge with an oil fil-
ter wrench, and then tighten it to the specified
torque with a torque wrench.
1. Oil filter cartridge
2. Oil filter wrench
1. O-ring
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8-20
8
10. Install panels D and E.
11. Install the engine oil drain bolt, and then tight-
en it to the specified torque.12. Add the specified amount of the recommend-
ed engine oil, and then install and tighten the
engine oil filler cap.
CAUTION:ECB00300
In order to prevent clutch slippage (since the
engine oil also lubricates the clutch), do not
mix any chemical additives. Do not use oils
with a diesel specification of “CD” or oils of
a higher quality than specified. In addition,
do not use oils labeled “ENERGY CONSERV-
ING II” or higher.
Make sure that no foreign material enters thecrankcase.
1. Torque wrenchTightening torque:
Oil filter cartridge:
17 Nm (1.7 m·kgf, 12 ft·lbf)
Tightening torque:
Engine oil drain bolt:
30 Nm (3.0 m·kgf, 22 ft·lbf)
Recommended oil:
See page 10-1.
Oil quantity:
Without oil filter cartridge replacement:
1.90 L (2.01 US qt) (1.67 Imp.qt)
With oil filter cartridge replacement:
2.00 L (2.11 US qt) (1.76 Imp.qt)
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8-21
8 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, and then check the oil lev-
el and correct it if necessary.
15. Install panel F.
EBU23410Changing the final 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 must be changed as follows
at the intervals specified in the periodic mainte-
nance and lubrication chart.
1. Place the ATV on a level surface.
2. Place an oil pan under the final gear case to
collect the used oil.
3. Remove the final gear oil filler bolt and the fi-
nal gear oil drain bolt to drain the oil from the
final gear case.
4. Install the drain bolt, and then tighten it to the
specified torque.
1. Final gear oil filler bolt
1. Final gear oil drain bolt
U2C661E0.book Page 21 Thursday, March 16, 2006 10:45 AM