2010 YAMAHA GRIZZLY 550 coolant temperature

4-2
4
EBU26693Indicator lights and warning lights
EBU17830Reverse indicator light“”
This indicator light comes on when the transmis-
sion is in the reverse position.EBU17860Neutral indicator light“”
This indicator light comes on when the transmis-
sion is in the neutral position.EBU28664Coolant temperature warning light“”
This warning light comes on when the engine over-
heats. When this occurs during operation, stop the
engine as soon as it is safe to do so and allow it to
cool down for about 10 minutes.
The electrical circuit of the warning light can be
checked by turning the key to “ON”. The warning
light should come on for a few seconds, and then
go off.
If the warning light does not come on initially when
the key is turned to “ON”, or if the warning light re-
mains on, have a Yamaha dealer check the electri-
cal circuit.
1. On-Command differential gear lock indicator light “DIFF.
LOCK”
2. Low-range indicator light “L”
3. High-range indicator light “H”
4. Neutral indicator light “N”
5. Reverse indicator light “R”
6. Park indicator light “P”
7. On-Command four-wheel-drive/differential gear lock
indicator“”/“”
8. Engine trouble warning light“”
9. Coolant temperature warning light“”
10.Electric Power Steering warning light “EPS” (for EPS
model)U28P61E0.book Page 2 Wednesday, March 18, 2009 9:25 AM

6-1
6
EBU19880
OPERATION
EBU19901Read the Owner’s Manual carefully before riding
the ATV. If there is a control or function you do not
understand, ask your Yamaha dealer.
WARNING
EWB00631Read the Owner’s Manual carefully to become
familiar with all controls in order to help pre-
vent any loss of control, which could cause an
accident or injury.EBU29051Starting the engine NOTICEECB00150See the “Engine break-in” section on page 6-4
prior to operating the engine for the first time.1. Turn the key to “ON” and the engine stop
switch to“”.
The following warning lights should come on
for a few seconds, then go off.

Coolant temperature warning light

Engine trouble warning light
The EPS warning light should come on, then
go off when the engine is started. (for EPS
model)
NOTICEECB00824If a warning light does not go off, see page 4-2
for the corresponding warning light circuit
check. To avoid possible damage, do not oper-
ate the ATV if a warning light stays on.2. Apply the brake pedal, and then shift the drive
select lever into the neutral or park position.
The corresponding indicator light should
come on. If the indicator light does not come
on, have a Yamaha dealer check the electrical
circuit.TIPThis model is equipped with an ignition circuit cut-
off system. The engine can be started under the
following conditions:
The drive select lever is in the neutral or park po-
sition.
U28P61E0.book Page 1 Wednesday, March 18, 2009 9:25 AM

8-32
8
TIP
The radiator fan is automatically switched on or
off according to the coolant temperature in the
radiator.
If the engine overheats, see page 8-63 for fur-
ther instructions.EBU27762To 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 pressure
to escape before completely removing the cap.1. Place the ATV on a level surface.
2. Remove panels D and F. (See page 8-8.)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 engine guard.) Coolant reservoir capacity (up to the maximum
level mark):
0.24 L (0.25 US qt, 0.21 Imp.qt)
1. Coolant drain bolt
U28P61E0.book Page 32 Wednesday, March 18, 2009 9:25 AM

10-5
10
Tail/brake light:
12 V, 5.0/21.0 W × 1
Meter lighting:
EL
Neutral indicator light:
LED
Reverse indicator light:
LED
Coolant temperature warning light:
LED
Engine trouble warning light:
LED
EPS warning light:
YFM550FAPZ LED
YFM5FGPHZ LED
YFM5FGPZ LED
Park indicator light:
LED
On-Command four-wheel-drive/differential gear lock
indicator:
LCD
High-range indicator light:
LED
Low-range indicator light:
LED
Differential gear lock indicator light:
LEDFuses:Main fuse:
40.0 A
Fuel injection system fuse:
15.0 AEPS fuse:
YFM550FAPZ 40.0 A
YFM5FGPHZ 40.0 A
YFM5FGPZ 40.0 A
Headlight fuse:
15.0 A
Signaling system fuse:
5.0 A
Ignition fuse:
15.0 A
Auxiliary DC jack fuse:
15.0 A
Four-wheel-drive motor fuse:
15.0 A
Radiator fan fuse:
20.0 A
U28P61E0.book Page 5 Wednesday, March 18, 2009 9:25 AM

INDEX
AAccessories and loading ................................................ 6-6
Accessories, auxiliary jack ........................................... 4-23
Air filter element, cleaning ............................................ 8-36
Axle boots .................................................................... 8-49BBattery .......................................................................... 8-53
Brake fluid, changing .................................................... 8-46
Brake fluid level, checking ............................................ 8-45
Brake hose protectors, checking the rear .................... 8-44
Brake lever, front .......................................................... 4-14
Brake levers, checking and lubricating ......................... 8-50
Brake pads, checking the front and rear ...................... 8-43
Brake pedal and rear brake lever ................................. 4-14
Brake pedal, checking and lubricating ......................... 8-51
Brake pedal free play, adjusting ................................... 8-47
Brakes .......................................................................... 8-43
Brakes, front and rear .................................................... 5-3CCables, checking and lubricating ................................. 8-50
Carrier, front ................................................................. 4-21
Carrier, rear .................................................................. 4-21
Chassis fasteners ........................................................... 5-7
Cleaning ......................................................................... 9-1
Coolant .................................................................. 5-3, 8-30
Coolant temperature warning light ................................. 4-2DDifferential gear oil ................................................ 5-3, 8-28Drive select lever .......................................................... 4-15
Drive select lever and driving in reverse ........................ 6-2
Drive select lever safety system cable, adjusting ......... 8-43
EEngine break-in .............................................................. 6-4
Engine oil ....................................................................... 5-3
Engine oil and oil filter cartridge ................................... 8-22
Engine stop switch ......................................................... 4-7
Engine trouble warning light ........................................... 4-3
EPS warning light (for EPS model) ................................ 4-3FFinal gear oil .......................................................... 5-3, 8-26
Four-wheel-drive/differential gear lock indicator ............ 4-4
Front and rear brake lever free play, checking ............. 8-46
Fuel ....................................................................... 4-16, 5-3
Fuel tank cap ................................................................ 4-15
Fuses, replacing ........................................................... 8-56HHandlebar switches ........................................................ 4-7
Headlight beam, adjusting ............................................ 8-59
Headlight bulb, replacing .............................................. 8-58
High-range indicator light ............................................... 4-4
Horn switch .................................................................... 4-8IIdentification numbers .................................................. 11-1
Indicator lights and warning lights .................................. 4-2
Instruments, lights and switches .................................... 5-7
U28P61E0.book Page 1 Wednesday, March 18, 2009 9:25 AM