41
CC390D
4. If any measurement exceeds the limit, the cylinder
must be replaced.
Measuring Camshaft Runout
NOTE: If the camshaft is out of tolerance, it must be
replaced.
1. Place the camshaft on a set of V blocks; then position
the dial indicator contact point against the shaft and
zero the indicator.
CC283D
2. Rotate the camshaft and note runout; maximum tol-
erance must not exceed specifications.
Measuring Camshaft Lobe Height
1. Using a calipers, measure each cam lobe height.
ATV1013A
2. The lobe heights must be greater than minimum
specifications.
Inspecting Camshaft Bearing Journal
1. Inspect the bearing journal for scoring, seizure
marks, or pitting.
2. If excessive scoring, seizure marks, or pitting is
found, the cylinder head assembly must be replaced.
NOTE: If the journals are worn, replace the cam-
shaft.
Inspecting Camshaft Spring/Drive Pin
1. Inspect the spring and unloader pin for damage.
CF061A
NOTE: With the weight extended, the unloader pin
should be flat-side out; with the weight retracted, the
unloader pin should be round-side out.
CF060A
2. If damaged, the camshaft must be replaced.
Installing Top-Side
Components
A. Piston
B. Cylinder
1. Lubricate the piston pin, connecting rod, and piston
pin bore with motor oil; then install the piston on the
connecting rod making sure there is a circlip on each
side.
Содержание 2016 Alterra 500
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