Page 149 - Manual Oficina Polaris RZR XP 1000 17-18

P. 149

ENGINE / COOLING SYSTEM

4. Inspect the cut area of the seat: 7. Remove valve and check where the Prussian Blue™
* If the contact area is less than 75% of the indicates seat contact on the valve face. The valve
circumference of the seat, rotate the pilot 180° and seat should contact the middle of the valve face or
make another light cut. slightly above, and must be the proper width.
* If the indicated seat contact is at the top edge of the
* If the cutter now contacts the uncut portion of the valve face and contacts the margin area w it is too
seat, check the pilot. Look for burrs, nicks, or runout. high on the valve face. Use the 30° cutter to lower
If the pilot is bent it must be replaced.
the valve seat.
* If the contact area of the cutter is in the same place, * If too low, use the 60° cutter to raise the seat. When
the valve guide is distorted from improper contact area is centered on the valve face, measure
installation.
seat width. 3
* If the contact area of the initial cut is greater than * If the seat is too wide or uneven, use both top and
75%, continue to cut the seat until all pits are bottom cutters to narrow the seat.
removed and a new seat surface is evident.
* If the seat is too narrow, widen using the 45° cutter
NOTICE and re-check contact point on the valve face and
seat width after each cut.
Remove only the amount of material necessary to
repair the seat surface.
NOTICE
5. To check contact area of the seat on the valve face, When using an interference angle, the seat contact
apply a thin coating of Prussian Blue™ paste to the point on the valve will be very narrow, and is a normal
valve seat. If using an interference angle (46°) apply condition. Look for an even and continuous contact
black permanent marker to the entire valve face q. point all the way around the valve face e.

6. Insert valve into guide and tap valve lightly into place
a few times.

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