Rocker Arm Shaft Assembly; Rocker Arm Shaft Run-Out; Visual Check - Daewoo DE12T Manual

3.2.4.

Rocker arm shaft assembly

1) Rocker arm shaft
•

Rocker arm shaft run-out

Place the rocker arm shaft on two V
blocks and inspect the shaft for bend
using a dial gauge.
•
If the amount of this run-out is small,
press the shaft with a bench press to
correct the run-out. Replace the shaft if
the measured value exceeds the limit.
Limit
•
Rocker arm shaft diameter
With an outside micrometer, measure
the rocker arm shaft diameter at the
point where the rocker arms have
been installed. l
Replace the rocker arm if the amount
of wear is beyond the specified limit.
Standard
N
23.978 ~
2) Rocker arm
•

Visual check

Visually check the face of the rocker arm in contact with the valve stem end for scores and
step wear. If the wear is small, correct it with an oil stone or grinding paper of fine grain size.
Rocker arm with a considerable amount of step wear should be replaced.
•
Diameter of the rocker arm bushing
Measure the inside diameter of the
rocker arm bushing with an inside
micrometer or vernier calipers, and
compare the measured values with
the rocker arm shaft diameter. If the
clearance exceeds the limit, replace
either bushing or shaft, whichever
worn more.
<Clearance>
Standard
0.020 ~ 0.093 mm
0.2 mm
Limit
N N
23.959 mm 23.75 mm
Limit
0.2 mm
INSPECTION AND MEASUREMENT
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EDM2037I
EA8M3002
EA0M4059