4-22. FLYWHEEL ASSEMBLY
(1) Flywheel face runout
Mount dial indicator (12) on
flywheel housing (9) with dial
indicator needle against clutch
Pry flywheel toward engine block
(at six oclock position) to insure
end play is in one direction,
Adjust dial indicator to read zero
at twelve oclock position.
When using hexagon head bolt at
front of crankshaft to turn crankshaft,
always turn bolt clockwise. Serious
engine damage may result if bolt
d. Rotate crankshaft and record readings at 60 degree intervals (6 readings). Pry flywheel
toward engine block before taking each reading.
Runout is the maximum negative reading plus the maximum positive reading. For
example, if maximum readings were 0.004 and -0.007 inch, then runout is 0.011
Maximum allowable runout is 0.001 inch per inch of radius. Measure radius from
center of flywheel to dial indicator needle (clutch contact face). For example if the
radius is 12 inches, then the runout should be less than 0.012 inch.
If flywheel face runout exceeds its maximum limit, remove flywheel and check for dirt or
foreign material between crankshaft and flywheel. Remount flywheel. If readings are still
out of limits, replace flywheel.