INSPECTION AND REPAIR OF BASIC ENGINE
6-15
3.12 Inspecting V-belt groove wear
Check the V-belt groove of the pulley for wear. Attach a
new V-belt around the pulley, apply high tension and
measure the sinkage of V-belt.
If the wear appears excessively, and the belt top surface
sinks 1.6 mm [0.06 in.] or more down from the top edge of
groove, replace the pulley with a new one.
If the pulley has two or more grooves for belt, and the
difference of the wear amount between grooves is
significant, replace the pulley with a new one.
Inspecting V-belt groove wear
3.13 Inspecting damper
(1)
Check the damper for cracks around the outer
periphery, swelling and/or cracks in the end plate,
silicone oil leakage and discoloration and separation of
coating due to thermal effect.
If any defect is found, replace the damper with a new
one.
(2) With the damper installed on the engine, measure the
face and radial runouts of the damper in the following
manner: Attach the dial gauge plunger on the outer
circumference of the damper to measure the radial
runout, or on the end face near the perimeter to measure
the face runout, and slowly turn the crankshaft. If the
limit is exceeded, replace the damper with a new one.
Measuring face and radial runout of damper
1.6 mm [0.06 in.]
or less
Item Nominal Standard Limit
Perpendicularity
runout
0.5 mm
[0.020 in.] or less
1.5 mm
[0.059 in.]
Replace with a
new one after
operating 8000
hours.
Periphery
runout
0.5 mm
[0.020 in.] or less
1.5 mm
[0.059 in.]
Face runout
Radial runout
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