WÄRTSILÄ RT-flex50-D, Maintenance Manual

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Maintenance
4103−1/A1
RT-flex50-D
Wärtsilä Switzerland Ltd
1/ 2
Tools: Key to Illustrations:
1 Feeler gauge 94122 0−6 Tooth profile
1 Micrometer a, b, c Lead wires
1 Dial gauge TF Driving flanks
1 Lead wire Ø 1.5 mm
1. General
Gear wheels of new engines have to be checked visually during the running-in pe-
riod after about 1−2 operating hours. The same applies to old engines which have
been equipped with new gear wheels.
2. Check
⇒
Rotate crankshaft with the turning gear until all the teeth have been inspected.
⇒
Check with running lubricating oil pump, whether all the spray nozzles are de-
livering oil freely.
⇒
Check whether all the screws are correctly locked, and whether any irregulari-
ties can be detected.
⇒
After the running-in period check the gear wheels periodically every three
months in the manner described above. Should in this time faults appear, then
these can in certain cases be remedied by an experienced engineer.
D
Should noises be heard in the region of the gear train, search for its cause.
Replace defective gear wheels as soon as ever possible, to prevent damage
to the mating gear wheels.
D
When the gear wheels have run well for an initial running period of 6000−8000
hours the above-mentioned inspection may be carried out annually.
D
For the checking of clearances and tooth impressions the tie rods and the
waisted studs of the main bearings must be tightened.
3. Checking the gear tooth backlash
Information concerning the gear tooth backlash values can be found in the table of
clearances (see
0330−1 ). The backlash can be determined in several ways. De-
pending on the possibilities, the following methods of measurement can be used:
3.1 With feeler gauge 94122
Measure the gap between the teeth flanks by using different thicknesses of feel-
ers. Repeat the measurement at a minimum of four points on the circumference of
the gear wheel.
3.2 With dial gauge
Mount the dial gauge in such a way that the turning movement can be read off in
mm. The gear wheel is turned in such a way that the tooth profile of one tooth
moves from one side to the other. When using this method of measuring care must
be taken since the drive wheel must not be allowed to turn.
Driving Wheels
Checking the Running and Backlash Clearances and Condition of Teeth
2010