Section 01 ENGINES (1503 4-TEC)
Subsection 07 (CYLINDER BLOCK)
Bearings
When bearings need to be removed from the
cylinder block, mark them to identify the correct
position at installation. See the following illustra-
tion for an example:
1
R1503motr37A
2
1. Mark on balancer shaft bearings
2. Mark on crankshaft bearings
Starter Drive Bearing
Check bearing
no. 21
of starter drive assembly
no. 22
in cylinder block and replace it if damaged.
R1503motr40A
1
TYPICAL
1. Bearing of starter drive assembly
Starter drive bearing can be easily removed from
crankcase lower half using the following suggest-
ed tool or equivalent:
– Snap-on hammer puller including:
– handle CJ93-1
– hammer CJ125-6
– claws CJ93-4.
F01J0ZA
Close puller claws so that they can be inserted
in end bearing. Holding claws, turn puller shaft
clockwise so that claws open and become firmly
tight against bearing.
Slide puller hammer outwards and tap puller end.
Retighten claws as necessary to always maintain
them tight against bearing. Continue this way un-
til bearing completely comes out.
Inspection
Cylinder
Check cylinder for cracks, scoring and wear ridges
on the top and bottom of the cylinder. If so, re-
place cylinder.
Cylinder Taper
Measure cylinder bore and if it is out of specifi-
cations, rehone cylinder sleeve and replace piston
ass'y with first oversize.
NOTE:
It is not necessary to have all cylinders
rehoned if they are not all out of specification.
Mixed standard size and oversize cylinders are al-
lowed.
Measure cylinder bore at 3 recommended posi-
tions. See the following illustration.
108
SMR2005-037
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Содержание Rotax 1503 4-Tec 2005
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