Robin America EH72, Service Manual

Page: 36 / 74

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5-4-3 Re-assembly
1) CRANKSHAFT
Install crankshaft onto crankcase.
CRANKSHAFT
Fig. 5-32
2) PISTON and CONNECTING ROD
(1) Install piston and connecting rod assembly into
cylinder by using a piston ring compressor to
hold piston rings.
(2) Temporary fit key and flywheel and turn
crankshaft to BTDC (bottom dead center). Lightly
tap the top of piston until large end of the rod
meet the pin portion of crankshaft.
(3) Set connecting rod cap to connecting rod with
the alignment marks mated and the clinching
portion clinched. Tighten bolts to the specified
torque.
Tightening torque
22.1 - 27.0 N
・
m
(225 - 275 kgf
・
cm)
(16.3 - 19.9 ft
・
lb.)
(4) Check for free movement of piston and
connecting rod by turning crankshaft slowly.
CONNECTING ROD
PISTON RING COMPRESSOR
MARK "1"
1
SECOND RING
OIL RING
TOP RING
Fig. 5-33
ALIGNMENT MARKS
Fig. 5-34
NOTE ;
Apply enough oil to bearing portion of
crankcase. For easy installation, put
crankcase on box or wood blocks.
NOTE ;
* The "1" mark of the connecting rod for #1
cylinder and "2" mark for #2 cylinder
should be faced to the flywheel side when
assembled.
* Apply enough oil to piston rings,
connecting rod bearings (large end) and
cylinder bore before assembly.
* Set gaps of piston rings as shown in
the illustration.