Arctic Cat Prowler HDX Service Manual page 48

NOTE: The valve seals must be replaced.
3. Remove the valve springs; then invert the cylinder
head and remove the valves.
Measuring Valve Stem Runout
1. Support each valve stem end with the V Blocks; then
check the valve stem runout using a dial indicator.
2. Maximum runout must not exceed specifications.
Measuring Valve Stem Outside
Diameter
1. Using a micrometer, measure the valve stem outside
diameter.
2. Acceptable diameter ranges must be within specifi-
cations.
Measuring Valve Face/Seat Width
1. Using a calipers, measure the width of the valve face.
CC134D
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.
CC136D
3. Rotate the valve in the V blocks.
4. Maximum runout must not exceed specifications.
Measuring Valve Guide
(Inside Diameter)
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. Acceptable inside diameter range must be within
ATV-1082
specifications.
3. If a valve guide is out of tolerance, the cylinder head
must be replaced.
Servicing Valves/Valve Guides/Valve
Seats
If valves, valve guides, or valve seats require servicing
or replacement, Arctic Cat recommends that the compo-
nents be taken to a qualified machine shop for servicing.
FI367
ATV1082A
45