Overview: Sportsman Forest 500 (Intl A12Mh50Ff); Brake Noise Troubleshooting - Polaris A12MH46AX Service Manual

BRAKES
Overview: Sportsman Forest 500 (INTL
A12MH50FF)
The Sportsman brake system consists of a complete
hydraulic brake system. All-wheel braking is integrated
into the foot brake and hand brake systems and allows 4
wheel braking from either control separately, or at the
same time.
When the foot brake is applied, all brake calipers are
active, as braking pressure is routed from the foot brake
master cylinder through the proportioning valve and
distribution block, exiting one line to the front calipers,
while the other line exits the proportioning valve and feeds
the outer line of the rear calipers.
When the hand brake is applied, all brake calipers are
active, as braking pressure is routed from the hand brake
master cylinder through the distribution block, exiting one
line to the front calipers, while the other line feeds the inner
line of the rear calipers.
When servicing Polaris ATV brake systems, use only
Polaris DOT-approved brake fluid.
WARNING
Once a bottle is opened, use what is necessary and
discard the rest in accordance with local laws. Do
not store or use a partial bottle of brake fluid. Brake
fluid is hygroscopic, meaning it rapidly absorbs
moisture. This causes the boiling temperature of
the brake fluid to drop, which can lead to brake fade
and the possible loss of control.

Brake Noise Troubleshooting

Dirt or dust buildup on the brake pads and disc is the most
common cause of brake noise (squeal caused by
vibration). If cleaning does not reduce the occurrence of
brake noise, a product such as Permatex Disc Brake Quiet
can be applied to the back of the pads. Follow directions
on the package. This will keep pads in contact with caliper
piston(s) to reduce the chance of squeaks caused by dirt
or dust.
9.4
9923412 - 2012 Sportsman 400/500 and EFI Tractor Service Manual
© Copyright 2011 Polaris Sales Inc.
BRAKE NOISE TROUBLESHOOTING
P C
OSSIBLE AUSE
Dirt, dust, or imbedded
material on pads or disc
Pad(s) dragging on disc
(noise or premature pad
wear)
Insufficient lever or pedal
clearance
Master cylinder reservoir
overfilled
Master cylinder
compensating port
restricted, Master cylinder
piston not returning
completely, Caliper
piston(s) not returning
Operator error (riding the
brake / park brake
applied)
Loose wheel hub or
bearings
Brake disc warped or
excessively worn
Brake disc misaligned or
loose
Noise is from other source
(chain, axle, hub, disc or
wheel)
Wrong pad for
conditions
R
EMEDY
Spray disc and pads with
ä
CRC Brake Kleen or
equivalent non-flammable
aerosol brake cleaner.
Remove pads and/or disc
hub to clean imbedded
material from disc or pads.
Adjust pad stop
Set to proper level
Check brake fluid level,
adjust as needed
Clean piston(s) seal
Educate operator
Tighten wheel, hub nuts or
replace bearings if worn
Replace disc
Inspect and repair as
necessary
If noise does not change
when brake is applied
check other sources.
Inspect and repair as
necessary
Change to a softer or
harder pad (if available)