Fitting Of Piston And Cylinder Assembly; 1) Fitting Of Hydraulic Valve Tappets; 2) Fitting Of Pistons - Rotax 914 F Maintenance Manual

14.9) Fitting of piston and cylinder assembly

14.9.1) Fitting of hydraulic valve tappets

14.9.2) Fitting of pistons

Zylinder 1 und 3 /
Cylinder 1 and 3
00305
Date
Page
1997 02 01
256
Lubricate bearing bore for valve tappets in crankcase. Apply LOCTITE Anti-
Seize to the contact surfaces of the valve tappets, lubricate their outside and
insert them according to the recorded position
into the crankcase. The valve tappet must
be able to turn in the crankcase with-
out resistance.
See Pic. 268, 269, 270, 271, 272
and 273.
The piston pin centre is offset from
piston centre. At installation of the
pistons the arrow Q on the piston
crown has to point toward prop
shaft. Therefore on the pistons for
cylinder no. 1 and 3 the offsetting
(narrower side W) of piston faces
downwards, on cylinders 2 and 4
the offsetting (narrower side E)
faces upwards.
Install the piston as shown on Pic.
beside. The offsetting of piston pin
bore is 1 mm (.039 in.).
If the arrow Q on piston crown is
no more visible, the piston must be
measured.
auf den Propellerflansch gesehen /
looking at propeller flange
2
Main
914 F
Bolzenachse
pin axis
1 mm
00303
Bolzenmitte
pin centre
00304
Pic. 270
Reference
Kolbenachse
piston axis
0,0394 in
1
Pic. 268
Nullhakenring /
circlip
Kolbenmitte /
piston centre
1mm / 0,394 in
Pic. 269
Zylinder 2 und 4 /
Cylinder 2 and 4
3
Modification no.
- 0 -