Page 564 - Manual Oficina Polaris Sportsman 570 2014 a 2016

BRAKE SYSTEM

BRAKE CONTROLS OVERVIEW BRAKE NOISE TROUBLESHOOTING
All Models (Excluding Forest and Intl.) Dirt or dust buildup on the brake pads and disc is the
most common cause of brake noise (squeal caused by
The Sportsman brake system consists of a complete
hydraulic brake system. All-wheel braking is integrated vibration). If cleaning does not reduce the occurrence of
into the hand brake systems and rear-wheel braking may brake noise, a product such as Permatex Disc Brake
be applied by pressing the auxiliary pedal. Either control Quiet can be applied to the back of the pads. Follow
may be applied separately, or at the same time. directions on the package. This will keep pads in contact
with caliper piston (s) to reduce the chance of squeaks
When the foot brake is applied, the rear brake caliper is caused by dirt or dust.
active, as braking pressure is routed from the foot brake
master cylinder through the line to the rear caliper. POSSIBLE CAUSE REMEDY
When the hand brake is applied, all brake calipers are Spray disc and pads with
active, as braking pressure is routed from the hand brake CRC Brakleen™ or
master cylinder through the distribution block, exiting two equivalent non-flammable
lines to the front calipers, while the other line feeds the Dirt, dust, or imbedded aerosol brake cleaner.
line to the rear caliper. material on pads or disc Remove pads and/or disc
hub to clean imbedded
Forest / Intl. material from disc or pads.
The Sportsman brake system consists of a complete Pad(s) dragging on disc
hydraulic brake system. All-wheel braking is integrated (noise or premature pad Adjust pad stop
into the foot brake and hand brake systems and allows 4 wear)
wheel braking from either control separately, or at the Insufficient lever or pedal
same time. clearance Set to proper level
When the foot brake is applied, all brake calipers are Master cylinder reservoir Check brake fluid level,
active, as braking pressure is routed from the foot brake overfilled adjust as needed
master cylinder through the proportioning valve and
distribution block, exiting one line to the front calipers, Master cylinder
while the other line exits the proportioning valve and compensating port
feeds the outer line of the rear calipers. restricted, Master cylinder Clean piston(s) seal
piston not returning
When the hand brake is applied, all brake calipers are completely, Caliper piston
active, as braking pressure is routed from the hand brake (s) not returning
master cylinder through the distribution block, exiting one
line to the front calipers, while the other line feeds the Operator error (riding the Educate operator
inner line of the rear calipers. brake / park brake applied)
When servicing Polaris ATV brake systems, use only Loose wheel hub or Tighten wheel, hub nuts or
Polaris DOT-approved brake fluid. bearings replace bearings if worn
Brake disc warped or
WARNING excessively worn Replace disc
Once a bottle is opened, use what is necessary and Brake disc misaligned or Inspect and repair as
discard the rest in accordance with local laws. Do not loose necessary
store or use a partial bottle of brake fluid. Brake fluid is If noise does not change
hygroscopic, meaning it rapidly absorbs moisture. This Noise is from other source when brake is applied
causes the boiling temperature of the brake fluid to (chain, axle, hub, disc or check other sources.
drop, which can lead to brake fade and the possible wheel) Inspect and repair as
loss of control.
necessary
Change to a softer or
Wrong pad for conditions
harder pad (if available)

9.6 9926803 R06 - 2014-2016 Sportsman 325 / ETX / 450 HO / 570 Service Manual
© Copyright Polaris Industries Inc.