Braking - Yamaha SXV4NP Operator's Manual

Braking

The following items are items that the
operator must be familiar with when
operating this snowmobile and its
hydraulic brake system. Important addi-
tional information on the proper mainte-
nance of the brake system is found in the
Maintenance section.
1. Use the brakes wisely. Each time the
brakes are applied in all hydraulic
brake systems (including automotive
applications), heat is transferred to the
brake fluid. The amount of heat trans-
ferred during high speed stops and/or
repetitive use may be high enough to
boil the brake fluid and cause the
brakes to either fade or may cause an
unexpected loss of brakes.
If this occurs, the brake fluid
requires a cool-down period before
the brakes will again function prop-
erly. This cool-down period will
vary depending upon the ambient air
temperature and the temperature of
the brake fluid. If loss of brakes has
occurred because of high fluid tem-
peratures, do not operate the snow-
mobile until the cool-down period
has expired and brake lever firmness
has returned.
! WARNING
Excessive, repetitive use of the
hydraulic brake for high speed stops
will cause overheating of the brake
fluid and premature brake pad wear
which will result in an unexpected
loss of brakes.
2. Be sure to maintain the brake fluid at
the proper level and take care not to
get any moisture in the system as
moisture in the brake fluid lowers the
boiling point. If the brake fluid is ever
boiled (by high speed stops or repeti-
tive use) or if moisture is allowed to
enter the system, it must be changed.
Never substitute or mix different types
or grades of brake fluid.
! WARNING
Use only Yamaha-approved DOT 4
brake fluid. Never substitute or mix
different types or grades of brake
fluid. Brake loss can result. Check
brake fluid level and pad wear before
each use. Brake loss can result in
severe injury or even death.
3. Never ride the brake. Even main-
taining minimal pressure on the
brake lever will cause the brake pads
to drag on the disc and may overheat
the brake fluid.
4. The brake lever lock is not a parking
brake and should not be applied for
periods exceeding
NEVER OPERATE THE SNOW-
MOBILE WITH THE BRAKE
LEVER LOCK ENGAGED.
! WARNING
The brake lever lock is not a parking
brake and should not be applied for
periods exceeding 5 minutes. The
brake lever lock maintains the brake
lever in the compressed position and
maintains pressure against the brake
disc; however, after a period of time,
the pressure applied to the brake disc
may relax below the amount required
to hold the snowmobile stationary.
5. Pumping the brake lever is permissible;
however, if pumping the brake lever
more than twice is necessary to obtain
the necessary stopping power, immedi-
ately take the snowmobile to an autho-
rized Yamaha Snowmobile dealer for
service. If not under warranty, this ser-
vice is at the discretion and expense of
the snowmobile owner.
6. When new brake pads are installed,
a "burnishing" process is required.
5 minutes.
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