2004 YAMAHA GRIZZLY 660 differential

4-33
NOTE:_

When the switch is set to “LOCK”, the differ-
ential gear lock indicator light will flash until
the differential gear is locked.


When the indicator light is flashing, turning
the handlebar back and forth will help the dif-
ferential gear lock to engage.


Riding before the differential gear lock is
properly engaged (e.g., when the indicator
light is flashing) will cause the engine speed
to be limited until engagement is complete.


When the ATV is in 4WD-LOCK, the maxi-
mum traveling speed is limited to 35 km/h.
However, if conditions require full engine
power to be available, push and hold the
override switch to disable the “4WD-LOCK”
speed limiter. (See page 4-21 for a detailed
explanation of this switch.)
_
EE.book Page 33 Tuesday, April 1, 2003 12:23 PM

5-1
EBU00113
PRE-OPERATION CHECKS
Before using this machine, check the following points:
ITEM ROUTINE PAGE
BrakesCheck operation, free play, fluid level and fluid leakage.
Fill with DOT 4 brake fluid if necessary.5-7–5-9,
8-91–8-105
FuelCheck fuel level.
Fill with fuel if necessary.5-11–5-13
Engine oilCheck oil level.
Fill with oil if necessary.5-15,
8-33–8-45
Coolant reservoirCheck coolant level.
Fill with coolant if necessary.8-57–8-67
Final gear oil/
Differential gear oilCheck for leakage.5-17–5-19,
8-47–8-55
ThrottleCheck for proper throttle cable operation. 5-21, 8-89
Wheels and tiresCheck tire pressure, wear and damage.5-25–5-31,
8-113–8-115
Fittings and fastenersCheck all fittings and fasteners. 5-21
Lights and switchesCheck for proper operation. 5-23, 8-127–8-131
Axle bootsCheck for damage. 8-69
EE.book Page 1 Tuesday, April 1, 2003 12:23 PM

5-19
EBU00678
Differential gear oil
Make sure the differential gear oil is at the speci-
fied level. Add oil as necessary. (See pages 8-53–
8-55 for details.)
EBU13160
Coolant
Check the coolant level in the coolant reservoir
when the engine is cold. (The coolant level will
vary with engine temperature.) The coolant level is
satisfactory if it is between the minimum and max-
imum level marks on the coolant reservoir. If the
coolant level is at or below the minimum level
mark, add distilled water to bring the level up to the
maximum level mark. Change the coolant every
two years. (See pages 8-57–8-67 for details.)CAUTION:_ Hard water or salt water is harmful to the en-
gine. You may use soft water if you cannot get
distilled water. _
Recommended oil:
SAE 80 API GL-4 Hypoid gear oil
EE.book Page 19 Tuesday, April 1, 2003 12:23 PM

8-7
EBU00262
PERIODIC MAINTENANCE/LUBRICATION
ITEM ROUTINEWhichever
comes firstINITIAL EVERY
km 320 1,200 2,400 2,400 4,800
hours 20 75 150 150 300
Valves*Check valve clearance.
Adjust if necessary.
Cooling systemCheck coolant leakage.
Repair if necessary.
Replace coolant every 24 months.Spark plugCheck condition.
Adjust gap and clean.
Replace if necessary.Air filter elementClean.
Replace if necessary.Every 20–40 hours
(More often in wet or dusty areas.)
Carburetor*Check starter (choke) operation.
Adjust engine idling speed.Crankcase breather
system*Check breather hose for cracks or damage.
Replace if necessary.Exhaust system*Check for leakage.
Tighten if necessary.
Replace gasket(s) if necessary.Fuel line*Check fuel hose for cracks or damage.
Replace if necessary.Engine oil
Replace (Warm engine before draining).Engine oil filter cartridge
Replace.Final gear oil
Check oil level/oil leakage.
Replace.Differential gear oil
Front brake*Check operation/fluid leakage/see NOTE page 8-8.
Correct if necessary.Rear brake*Check operation/fluid leakage/see NOTE page 8-8.
Correct if necessary.V-belt*Check operation.
Check for cracks or damage.Wheels*Check balance/damage/runout.
Repair if necessary.EE.book Page 7 Tuesday, April 1, 2003 12:23 PM

8-51 1. Differential gear oil
2. Differential gear case oil filler bolt
3. Specified level
1. Huile de différentiel
2. Boulon d’orifice de remplissage du carter de différentiel
3. Niveau d’huile spécifié
1. Aceite de engranajes del diferencial
2. Perno de relleno de aceite de la caja del diferencial
3. Nivel especificado
EBU00706
Differential gear oil
Differential gear oil measurement
1. Place the machine on a level place.
2. Remove the oil filler bolt and check the oil lev-
el. It should be up to the brim of the hole. If
the level is low, add sufficient oil to raise it to
the specified level.CAUTION:
Be sure no foreign material enters the differen-
tial gear case. 3. Install the oil filler bolt and tighten it to the
specified torque.
Tightening torque:
Oil filler bolt:
23 Nm (2.3 m·kgf)
EE.book Page 51 Tuesday, April 1, 2003 12:23 PM

8-53 1. Differential gear case oil drain bolt
1. Boulon de vidange de l’huile de différentiel
1. Perno de drenaje de aceite de engranajes del diferencial
Differential gear oil replacement
1. Place the machine on a level place.
2. Place a container under the differential gear
case to catch the oil.
3. Remove the filler bolt and drain bolt to drain
the oil.
4. Install the drain bolt and tighten it to the spec-
ified torque.
Tightening torque:
Drain bolt:
10 Nm (1.0 m·kgf)
EE.book Page 53 Tuesday, April 1, 2003 12:23 PM

8-55
5. Fill the differential gear case with oil.CAUTION:
Be sure no foreign material enters the differen-
tial gear case. 6. Install the filler bolt and tighten it to the speci-
fied torque.
7. Check for oil leakage. If oil leakage is found,
check for the cause. Recommended oil:
SAE 80 API “GL-4” Hypoid gear oil
Oil quantity:
Periodic oil change:
0.28 L
Total amount:
0.33 L
EE.book Page 55 Tuesday, April 1, 2003 12:23 PM

10-3
Engine oil:
Quantity:
Without oil filter cartridge replacement 1.9 L
With oil filter cartridge replacement 2.0 L
Final gear case oil:
Type SAE80 API “GL-4” Hypoid gear oil
Quantity:
Periodic oil change 0.25 L
Total amount 0.30 L
Differential gear case oil:
Type SAE80 API “GL-4” Hypoid gear oil
Quantity:
Periodic oil change 0.28 L
Total amount 0.33 L
Air filter: Wet element
Fuel:
Type For Europe
REGULAR UNLEADED GASOLINE ONLY
For Oceania
UNLEADED GASOLINE ONLY
Fuel tank capacity 20 L
Fuel reserve amount 3.5 LModel YFM660F
EE.book Page 3 Tuesday, April 1, 2003 12:23 PM