2003 YAMAHA GRIZZLY 660 coolant reservoir

3-1
EBU00032
DESCRIPTION AND MACHINE
IDENTIFICATION1. Rear shock absorber spring
preload adjusting ring
2. Storage compartment and tool
kit
3. Air filter case
4. Front brake fluid reservoir
5. Front shock absorber spring
preload adjusting ring
6. Rear brake fluid reservoir
7. Rear brake pedal
8. V-belt case drain plug
9. Radiator cap
10. Drive select lever
11. Fuel tank cap
12. Fuel cock
13. Fuses14. Battery
15. Engine oil dipstick
16. Recoil starter
17. Coolant reservoir
18. Drive select lever box check
hose
19. V-belt cooling duct check hose
20. Rear brake lever
21. Left handlebar switches
22. Horn
23. Speedometer unit
24. Main switch
25. Right handlebar switches
26. Throttle lever
27. Front brake lever
28. Auxiliary DC jack
29. Starter (choke)NOTE:The machine you have purchased may differ
slightly from those shown in the figures of this
manual.
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5-1
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PRE-OPERATION CHECKS
Before using this machine, check the following points:
ITEM ROUTINE PAGE
Brakes• Check operation, free play, fluid level and fluid leakage.
 Fill with DOT 4 brake fluid if necessary.5-7–5-9,
8-93–8-107
Fuel Check fuel level.
 Fill with fuel if necessary.5-11–5-13
Engine oil Check oil level.
 Fill with oil if necessary.5-15–5-17,
8-33–8-45
Coolant reservoir Check coolant level.
 Fill with coolant if necessary.8-57–8-67
Final gear oil/
Differential gear oil Check for leakage.5-19–5-21,
8-45–8-55
Throttle Check for proper throttle cable operation. 5-23, 8-91
Wheels and tires Check tire pressure, wear and damage.5-27–5-33,
8-115–8-117
Fittings and Fasteners Check all fittings and fasteners. 5-23
Lights Check for proper operation. 5-25, 8-129–8-135
Axle boots Check for damage. 8-69
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5-21
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Differential gear oil
Make sure the differential gear oil is at the speci-
fied level. Add oil as necessary. (See pages 8-51–
8-55 for details.)
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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 upper and lower
level marks on the coolant reservoir. If the coolant
level is at or below the lower level mark, add tap
water (soft water) to bring the level up to the upper
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 distilled water if you cannot
get soft water. _
Recommended oil:
SAE 80 API GL-4 Hypoid gear oil
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5-23
WARNING
_ Wait 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 put a thick rag over the cap
when opening. Allow any remaining pressure
to escape before completely removing the cap. _
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Throttle lever
Check to see that the throttle lever operates cor-
rectly. It must open smoothly and spring back to
the idle position when released. Have a Yamaha
dealer repair as necessary for proper operation.
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Fittings and fasteners
Always check the tightness of chassis fittings and
fasteners before a ride. Take the machine to a
Yamaha dealer or refer to the Service Manual for
correct tightening torque.Coolant reservoir capacity:
0.3 L
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8-57 1. Coolant reservoir tank cap
2. Maximum level mark
3. Minimum level mark
1. Bouchon du vase d’expansion
2. Repère de niveau maximum
3. Repère de niveau minimum
1. Tapa del depósito de refrigerante
2. Marca de nivel máximo
3. Marca de nivel mínimo
EBU01000
Cooling system
1. Check the coolant level in the reservoir when
the engine is cold as the coolant level will
vary with engine temperature. The coolant
level should be between the maximum and
minimum marks.
2. If the level is low, remove panel D. (See page
8-17 for panel removal and installation proce-
dures.)
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8-59
3. Remove the reservoir cap, and then add
coolant or distilled water to raise it to the
specified level.
4. Install the panel.CAUTION:_ Hard water or salt water is harmful to the en-
gine. You may use soft water if you can’t get
distilled water. _NOTE:_

If water is added, have a Yamaha dealer
check the antifreeze content of the coolant as
soon as possible.


The radiator fan operation is completely auto-
matic. It is switched on or off according to the
coolant temperature in the radiator.
_If your ATV overheats, see page 8-140 for details.Coolant reservoir capacity:
0.30 L
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8-63 1. Radiator cap
1. Bouchon du radiateur
1. Tapa del radiador
1. Coolant reservoir drain hose
1. Boulon de vidange du liquide de refroidissement
1. Manguera de drenaje del depósito de refrigerante
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
coolant 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, and then tighten the coolant drain
bolt to the specified torque.
Tightening torque:
Coolant drain bolt:
10 Nm (1.0 m·kgf)
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8-65
10. Install the coolant reservoir hose.
11. Pour the recommended coolant into the radi-
ator until it is full.CAUTION:_ Hard water or salt water is harmful to the en-
gine. You may use soft water if you can’t get
distilled water. _
Recommended antifreeze:
High quality ethylene glycol antifreeze
containing corrosion inhibitors for
aluminum engines.
Antifreeze and water mixing ratio:
1:1
Total amount:
1.8 L
Coolant reservoir capacity
(up to the maximum level mark):
0.3 L
U5KM61.book Page 65 Friday, July 26, 2002 11:13 AM