Valve Rotator
Inspection / Evaluate
A5.05. 01.03.01.00
150
M20
en / 16.09.1997 IB000333 1/1
01
Ĺ
See also: 01.07.01.nn, 01.10.00.nn
Spare parts list: B1.05.01.2.2107
Time requirement: 1 Pers./ 0,10 h
Personnel qualification: skilled engine hand
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Operating medium: Heavy fuel and distillate fuel
Inspection:
of the valve rotator every 150 h
Attention:
Heavy fuel operation: = 4 valve rotators inlet and exhaust valves
Distillate fuel operation: = 2 valve rotators inlet valves only
Note:
Check the rotational speed of the valves versus engine speed immediately after starting a
new engine or when a plant has been overhauled. Use this rotational speed for reference
later.
Sequence of operations:
1. Check valve rotation.
2. The valve rotator works properly if a uniform and engine speed dependent rotation can be
detected.
3. Lubricate the valve rotator with some drops of lubricating oil/gas oil mixture
(mixture ratio 1:1) if a considerable deceleration of rotation, is detected in comparison to
the new condition.
3.1 If, at nominal engine speed, the rotational speed goes down to approx 1 rpm, the valve
rotator has to be changed.
Note:
Deceleration of the valve rotation can also be caused by hard motion of the valve stem in
the valve guide. Remedy: Inject the gas oil/lubricating oil mixture drop by drop onto the
valve stem.
Attention:
Do not apply too much lubricating oil/gas oil mixture. There is danger of lubricating oil
dilution!
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