3) Dimensions Of Pistons And Piston Rings; 4) Piston Pin; 5) Cylinder Checking - Rotax 914 F Maintenance Manual

14.6.3) Dimensions of pistons and piston rings

dimensions
See Wear Limits, Chapter 15).

14.6.4) Piston pin

dimensions
See Wear Limits, Chapter 15).

14.6.5) Cylinder checking

3
00297
3
Date
Page
1997 02 01
254
See Pic. 256, 259, 260 and 261.
Measure piston pin and check for traces of seizure in area of con-rod seat. In
case of distinct traces of seizure, renew piston pin even if dimensions are
correct.
The circlips for axial piston pin securing must be used only once and therefore
must be renewed.
See Pic. 262 and 263.
Nickel-silicon coated cylinder wall. All 4 cylinders are identical. Clean
cooling fins Q of cylinder. Remove carbon deposits from top end W of
cylinder bore. Clean sealing faces E on top and bottom side and inspect
cylinder.
Measure cylinders as per illustration and record dimensions in the Dimen-
sion Sheet, Chapter 16). Determine piston to wall clearance, see Chapter
14.6.1). If the wear limit of the cylinder is reached, renew cylinder and piston.
Dimensions
See Wear Limits, Chapter 15).
NOTE: Slight oil carbon residues on the cylinder sealing face
indicate leakage. True up cylinder along with cylinder head.
2
Pic. 262
Main
914 F
new
new
new
1
00298
Reference
wear limit
wear limit
wear limit
D3
D1
D2
Pic. 263
Modification no.
0
5
40
76
- 0 -