Komatsu Galeo PC138US-8 Shop Manual page 799

50 Disassembly and assembly
[*3]
Measuring radial runout of flywheel
q
1) Install dial gauge [2] to the flywheel hous-
ing.
2) Set the probe of the dial gauge at right
angles to the spigot joint (a) or the outer
periphery of the flywheel.
3) Rotate the crank shaft one full turn and
measure the difference of the maximum
values of runout of the needle.
a Check that the position of needle
remains in its original position after
the flywheel is rotated one full turn.
Radial runout: Max. 0.15 mm
Measuring face runout of flywheel
q
1) As with the measurement of radial runout,
set the probe of the dial gauge at right
angles to end face (b) close to the outer
periphery of the flywheel.
a For measurement, move the crank
shaft forward or backward to prevent
error caused by an end play.
2) Rotate the crank shaft one full turn and
measure the difference of the maximum
values of runout of the needle.
Face runout: Max. 0.25 mm
PC138US, USLC-8
SEN02710-00
11