21
ATV-1082
2. Maximum runout must not exceed specifications.
Measuring Valve Face/Seat Width
1. Using a micrometer, measure the width of the valve
face.
ATV-1004
2. Acceptable width must be at or above specifications.
Measuring Valve Face Radial
Runout
1. Mount a dial indicator on the surface plate; then
place the valve stem on a set of V blocks.
2. Position the dial indicator contact point on the out-
side edge of the valve face; then zero the indicator.
ATV1082A
3. Rotate the valve in the V blocks.
4. Maximum runout must not exceed specifications.
Measuring Valve Stem to Guide
Clearance
1. Insert a snap gauge 1/2 way down into each valve
guide bore; then remove the gauge and measure it
with a micrometer.
2. Using a micrometer, measure the valve stem outside
diameter. Valve stem to guide clearance must not
exceed specifications.
3. If valve stem to guide clearance exceeds specifica-
tions, the cylinder head assembly must be replaced.
Servicing Valves/Valve Guides/
Valve Seats
If valves, valve guides, or valve seats require servicing or
replacement, Arctic Cat recommends the components be
taken to a qualified machine shop for servicing.
Measuring Rocker Arm to Shaft
Clearance
1. Using a dial calipers, measure the inside diameter of
the rocker arm.
2. Using a micrometer, measure the outside diameter of
the rocker arm shaft.
3. Subtract the shaft diameter from the rocker arm
diameter.
4. Acceptable clearance must be within specifications.
Installing Valves
1. Apply grease to the inside surface of the valve seals;
then place a valve guide seal over each valve guide.
CC144D
2. Insert each valve into its original valve location.
3. Install the valve springs and seats with the closest
wound end of the spring directed toward the cylinder
head.
CAUTION
If valves are discolored or pitted or if the seating sur-
face is worn, the valve must be replaced. Do not attempt
to grind the valves or severe engine damage may occur.
Manual
Table of Contents
FOR ARCTIC CAT ATV DISCOUNT PARTS CALL 606-678-9623 OR 606-561-4983
www.mymowerparts.com