HYOSUNG RT 125 D, Руководство по обслуживанию

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35
ENGINE 3-12
Camshaft runout
(IN. & EX.)
Service limit
0.10 mm (0.004 in)
⊙ ⊙
CAMSHAFT RUNOUT
Support the camshaft using a V-blocks and measure
the camshaft runout using the dial gauge. If the
runout exceeds the service limit, replace the
camshaft with a new one.
Dial gauge : 09900-20606
Magnetic stand : 09900-20701
V-block : 09900-21304
⊙ ⊙
CAMSHAFT
The camshaft should be checked for runout and also
for wear of cams and journals if the engine has been
noted to produce abnormal noise or vibration or a
lack of out-put power. Any of these abnormality could
be caused by a worn camshaft.
VALVE TIMING DIAGRAM
Cam height
Intake cam
Exhaust cam
34.12 mm (1.343 in)
34.17 mm (1.345 in)
Service limit
⊙ ⊙
CAMSHAFT WEAR
Worn-down cams are often the cause of mistimed
valve operation resulting in reduced output power.
The limit of cam wear is specified for both intake and
exhaust cams in terms of cam height
, which is to
be measured with a micrometer. Replace camshafts
if found it worn down to the limit.
Micrometer(25~50 mm) : 09900-20202
Intake open
(B.T.D.C)
TDC (0
。 。
)
Exhaust close
(A.T.D.C)
Exhaust open
(B.B.D.C)
Intake close
(A.B.D.C)
17 。
14 。
45 。
48 。
90 。
270
。
BDC
(180
。 。
)