Valve Rotator
Inspection / Evaluate
A5.05. 01.03.01.00
150
M20
en / 24.09.2010 IB000333 1/1
01
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
--------------------------------------------------------------------------------------------------------------------------------
Operating medium: Heavy fuel and distillate fuel
Inspection:
of the valve rotator every 150 h
Sequence of operations:
1. Check valve rotation.
2. The valve rotator works properly if a uniform and engine speed dependent rotation can be detec-
ted.
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.
CAUTION
Heavy fuel operation:=4 valve rotatorsinlet and exhaust valves
Distillate fuel operation:=2 valve rotatorsinlet valves only
NOTE
Check the rotational speed of the valves versus engine speed immediately after star-
ting a new engine or when a plant has been overhauled. Use this rotational speed for
reference later.
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.
CAUTION
Do not apply too much lubricating oil/gas oil mixture. There is danger of lubricating oil
dilution!
To Next Page
Loading...