Rotax 914 F - 3) Fitting of Cylinder; 4) Fitting of Cylinder Head

Reference
Modification no.
- 0 -
Page
258
Date
1997 02 01
Main
914 F
01480
14.9.3) Fitting of cylinder
See Pic. 274.
Place O-ring 87x2 on cylinder spigot
and lubricate cylinder. Pay attention to
position of piston ring gaps Q. The gap
of the 1
st
and 3
rd
piston ring should be in
the middle of piston skirt, and the 2
nd
ring be turned by 180°. The ring gap
should never be in the area of the piston
pin bore.
Check whether piston pin circlips are
installed. Lubricate piston, compress
rings with piston ring spanner and fit the
coordinated cylinder with care. Same procedure with the other cylinders.
■ ATTENTION: To avoid ring breakage, use piston ring spanner, part no.
876 978.
14.9.4) Fitting of cylinder head
See Pic. 275, 276 and 277.
Apply a thin film of LOCTITE 221 to sealing face of cylinder. Install respective
pushrod Q in both oil return tubes on pre-assembled cylinder head and place
pre-oiled O-ring W 16x5 on oil return tube E.
Fit cylinder head until O-rings W on both oil return tubes rest in crankcase R.
Now lift cylinder T until the centering Y of cylinder engages in the cylinder
head recess U.
◆ NOTE: This is a safety measure to prevent
jamming of cylinder head resulting in leakage.
Fit cylinder head and cylinder together on
crankcase. Tighten cylinder head crosswise
with 2 cap nuts M8 and 2 hex. nuts M8 along
with washers, tightening slightly only! En-
sure to squeeze O-rings W evenly into crank-
case.
Repeat this procedure on the other cylinder
heads.
5
7
1
4
6
2
toptop
Ringstoß
ring gap
1
2
3
Pic. 274
Pic. 275
3
1
00309
00278