12) Gearbox Components - Checking - Rotax 914 F Maintenance Manual

14.4.12) Gearbox components — checking
See Pic. 232, 233, 234, 235, 236 and 237.
Clean disassembled gearbox with kerosine or gaso-
line and check the following components:
Modification no.
- 0 -
Check crankshaft bearing bush Q fitted in gear
cover for tight fit, check dimension {, see Chapter
15).
Check both bearing seats W and E on propeller
shaft. See dimensions } and q in Chapter 15).
Check oil seal contact surfaces R and T. Check
propeller flange for out of true, see dimension w in
Chapter 15).
Propeller shaft must be without corrosion on bearing seats
W and E. The ball bearing Y 6207 E (35-72-17) must be a
press fit on its outer
race in gear
cover and its
inner race on
propeller shaft.
Check groove U for ring
halves and teeth I for
wear or damage.
On version F3 check the
inner diameter O in the
area of the oil inlet flange
P, see dimension e in
Chapter 15).
Inspect propeller shaft for cracks by mag-
netic particles inspection method
(Magnaflux), see Chapter 11.4). Check
tangential intensity of magnetic field with
test instrument DEUTROMETER 3870.
Nominal value is 10 ÷ 50 A/cm. At indication of cracks renew
the respective part. Clean and demagnetize the part. The
maximum remaining magnetism must not exceed 1,2 A/cm.
Register the results of the magnetic particle inspection in the
respective Form Sheet, see Chapter 16.4).
Visually check dog gear { and dog hub } for pitting on gear teeth and
sliding ramps q of dogs. Ensure that ramp tops of the dog gear are
clearing ramp valleys of dog hub. Check clearance, dimension r in
Chapter 15). Slight wear and
pitting on the dogs is permissi-
ble.
Reference
Maß/dim.
3
4
Pic. 233
00266
00267
Main
914 F
Pic. 232
1
Maß/
00265
6
2
7
8
9
Pic. 234
10
13
Maß/dim.
00268
}
Pic. 235
Date
Page
1997 02 01
243
5
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