Polaris 1999 Sportsman 400 Service Manual page 409

BRAK ES
®
403
@
wear and increase brak e fluid temperature. Replace
the piston seals if the following conditions exist:
a. Brakc fluid Icads around either brake pad.
b. Stuck pis ton seal(s).
c. There is a large diffe rence in the inner and
outer brak e pad thickness.
NO TE
Never reuse
lln
old piston seal.
V el)'
minor damage or age deterioration
can make the seals useless.
I I. Inspect the brake pads (Fig ure 39 ) for uneven
wear, damage or gre ase contam ination. If the pad
thick ness is with specification. c1can off the pad
surface with an aero sol brake cleaner
10
remo ve any
surface contamination.
NOTE
When the brake system is operating
correctly. the inboard and outboard
brake pads should show the same ap-
pro ximately amo unt of wear.
If
there
is a large difference in pad wem; the
pisto n
seals
lire fa ulty and not allo w-
ing the piston
10
return
properly .
This
causes one pad
10
drag against the
disc.
Assembly
NO TE
Use only lie u.:
DOT 3 brakefluid
when
brake f luid is cal/ed fo r in the fol/ow-
ing procedure.
I. Soak thc piston sea ls in brak e fluid for approxi-
mately five minutes.
2. Lightly coat the pistons and cy linder bores with
brake fluid.