2005 YAMAHA RHINO 660 engine

7-21
If you start to lose traction or momentum when
climbing, and you decide you will be unable to con-
tinue, use the brakes to come to a stop. Do not at-
tempt to turn the vehicle around. With your foot on
the brake, look behind you and plan your descent.
Shift the drive select lever in reverse so you can
use the engine brake if necessary to slow your de-
scent. Release the brake and begin to coast down
the hill. Use engine braking as much as possible,
gently applying the brakes when necessary.
GOING DOWNHILL
Check the terrain carefully before going down a
hill. When possible, choose a path that lets you
drive your vehicle straight downhill. Avoid sharp
angles that could allow the vehicle to pitch or roll
over. Carefully choose your path and drive no fast-
er than you will be able to react to obstacles that
may appear.
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7-23
WARNING
Going down a hill improperly could cause loss
of control or cause the vehicle to overturn.

Always check the terrain carefully before
you start down any hill.


Never go down a hill at high speed.


Avoid going down a hill at an angle that
would cause the vehicle to lean sharply to
one side. Go straight down the hill where
possible.
Before starting down hill, make sure the vehicle is
in low-range 4WD. On most slopes, this will let you
use engine braking to help you go downhill slowly.
Go as slowly as possible. If you are starting to go
too fast, apply the brakes gently. Avoid sudden ap-
plication of the brakes, which could cause the ve-
hicle to start sliding.
If you are sliding or skidding, try to steer in the di-
rection the vehicle is sliding to help you regain con-
trol.
U5UG61.book Page 23 Monday, September 6, 2004 9:00 AM

8-1
EVU01450
1-PERIODIC MAINTENANCE AND
ADJUSTMENTPeriodic inspection, adjustment and lubrication will
keep your vehicle in the safest and most efficient
condition possible. Safety is an obligation of the
vehicle owner. The most important points of vehi-
cle inspection, adjustment and lubrication are ex-
plained on the following pages.
WARNING
Never service an engine while it is running.
Moving parts can catch clothing or parts of the
body, causing injury. Electrical components
can cause shocks or can start fires. Turn off
the engine when performing maintenance un-
less otherwise specified. Have a Yamaha deal-
er perform service if you are not familiar with
vehicle service.
U5UG61.book Page 1 Monday, September 6, 2004 9:00 AM

8-7
EVU00670
PERIODIC MAINTENANCE/LUBRICATION
NOTE:

For vehicles not equipped with an odometer or hour meter, follow the month maintenance intervals.


For vehicles equipped with an odometer or an hour meter, follow the km (mi) or hours maintenance in-
tervals. However, keep in mind that if the vehicle isn’t used for a long period of time, the month main-
tenance intervals should be followed.
ITEM ROUTINEWhichever
comes firstINITIAL EVERY
month136612
km
(mi)320
(200)1,200
(750)2,400
(1,500)2,400
(1,500)4,800
(3,000)
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 elements
(Engine and air intake duct)Clean.
Replace if necessary.Every 20–40 hours
(More often in wet or dusty areas.)
Carburetor*Check idle speed/starter operation.
Adjust if necessary.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).U5UG61.book Page 7 Monday, September 6, 2004 9:00 AM

8-8
Engine oil filter cartridge
Replace.Final gear oil
Check oil level/oil leakage.
Replace.Differential gear oil
Front brake*Check operation/brake pad wear/fluid leakage/see NOTE page
8-9.
Correct if necessary. Replace pads if worn to the limit.Rear brake*Check operation/brake pad wear/fluid leakage/see NOTE page
8-9.
Correct if necessary. Replace pads if worn to the limit.Accelerator pedal*
Check operation and free play.V-belt*Check operation.
Check for wear, cracks, or damage.Wheels*Check balance/damage/runout.
Repair if necessary.Wheel bearings*Check bearing assemblies for looseness/damage.
Replace if damaged.Front and rear
suspension*Check operation and for leakage.
Correct if necessary.Steering system*Check operation and for looseness/Replace if damaged.
Check toe-in/Adjust if necessary.Rear upper and lower
knuckle pivots*Lubricate with lithium-soap-based grease.Drive shaft universal joint*
Lubricate with lithium-soap-based grease.Engine mount*Check for cracks or damage.
Check bolt tightness.Front and rear axle boots*Check operation.
Replace if damaged.Stabilizer bushings*
Check for cracks or damage.
ITEM ROUTINEWhichever
comes firstINITIAL EVERY
month136612
km
(mi)320
(200)1,200
(750)2,400
(1,500)2,400
(1,500)4,800
(3,000)
hours 20 75 150 150 300
U5UG61.book Page 8 Monday, September 6, 2004 9:00 AM

8-23
EVU00700
Engine oil and oil filter cartridge
The engine oil level should be checked before
each operation. In addition, the oil must be
changed and the oil filter cartridge replaced at the
intervals specified in the periodic maintenance and
lubrication chart.
To check the engine oil level
1. Place the vehicle on a level surface.
2. Remove the console. (See page 8-21 for
console removal and installation proce-
dures.)
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.
U5UG61.book Page 23 Monday, September 6, 2004 9:00 AM

8-25 1. Maximum level mark 2. Minimum level mark
3. Dipstick 4. Engine oil filler cap
1. Repère de niveau maximum 2. Repère de niveau minimum
3. Jauge
4. Bouchon de remplissage de l’huile moteur
1. Marca de nivel máximo 2. Marca de nivel mínimo
3. Varilla de medición
4. Tapón de llenado de aceite del motor
5. Remove the engine oil filler cap and wipe off
the dipstick with a clean rag.
6. Insert the dipstick in the oil filler hole (without
screwing it in), and then remove it again to
check the oil level.NOTE:_ The engine oil should be between the minimum
and maximum level marks. _7. If the engine oil is at or below the minimum
level mark, add sufficient oil of the recom-
mended type to raise it to the correct level.
8. Insert the dipstick into the oil filler hole, and
then tighten the oil filler cap.
9. Install the console.
U5UG61.book Page 25 Monday, September 6, 2004 9:00 AM

8-27 1. Engine oil drain bolt
1. Vis de vidange d’huile moteur
1. Perno de vaciado del aceite del motor
1. Oil filter cartridge 2. Oil filter wrench
1. Cartouche de filtre à huile 2. Clé pour filtre à huile
1. Cartucho del filtro de aceite 2. Llave para filtros de aceite
To change the engine oil (with or without oil fil-
ter cartridge replacement)
1. Remove the console. (See page 8-21 for
console removal and installation proce-
dures.)
2. Start the engine, warm it up for several min-
utes, and then turn it off.
3. Place an oil pan under the engine to collect
the used oil, and then remove the engine oil
filler cap.
4. Remove the engine oil drain bolt to drain the
oil from the crankcase.NOTE:_ Skip steps 5–7 if the oil filter cartridge is not being
replaced. _5. Remove the oil filter cartridge with an oil filter
wrench.NOTE:_ An oil filter wrench is available at a nearby
Yamaha dealer. _
U5UG61.book Page 27 Monday, September 6, 2004 9:00 AM