Inlet Valve Cones
Repair / Checking
A5.05. 01.08.01.01
M20
en / 31.05.2010 IB022652 1/5
01
See also: 01.07.01.nn, 01.08.02.nn
Spare parts list: B1.05.01.2.2107
Time requirement: 0 Pers./ 0,00 h
Personnel qualification: Chief engineer / skilled engine hand
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Operating medium: Heavy fuel and distillate fuel
Tools:
Valve refacer W1 2.9224-A
Auxiliary material:
Diamond paste Dp 30/10 - 15 µm *
Thinner F25 *
* or a product of equal standard
Sequence of operations:
1. Check of valve condition
1.1 Valves may be reused without refinishing when
•
the circumference of the valve cone face is metallic bright
•
the valve cone face does not indicate carbon pockets with blowholes,
•
by inspecting cracks, using magnifying glass with light (8 fold magnification) or powder spraying
procedure (Met L'Check) and/or in the flux procedure, no crack formation is discovered at the
valve cone face.
NOTE
Grind new or refinished and/or used undamaged inlet valve cones before the installa-
tion in accordance with sequence of operations 4.
Refinishing of the valve cones (in accordance with sequence of operations 3) may be
necessary in the following cases:
•
after extended operating periods,
•
in the case of negative result, e.g. damaged sealing faces, deep scars, uneven con-
tact reflections of the valve cone/seat.
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