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en / 12.10.2000
IB022666
3/5
01
2.
Cleaning
Clean the valve cone, e.g. blasting with
glass beads. Cleaning with sharp-edged
tools as well as pickling with inorganic
acids (hydrochloric acid, sulphuric acid,
hydrofluoric acid etc.) is not allowed.
3.
Repair (refinishing of the valve cone
face)
Note:
Refinishing should always be carried
out professionally on precision spindle
grinding machines. If no such machine
is available, the valves should be given
to a MaK workshop for regrinding.
3.1
Regrind valve cone faces in accordance
with prescribed angle (
Fig. 3
). Do not
refinish existing concave fillet.
3.2
The appropriate information of the
grinding machine manufacturers is to
be observed during grinding.
3.3
Determine the dimension between
visible edge of the base metal plating
“
X
” and the outer edge of the seat after
completing the grinding process.
Replace the valve cone if the actual
dimension falls below the minimum
dimension.
3.4
Outer edge rounded with stone.
Attention:
When the valve cone is refinished, the
valve seat ring must also be refinished
(01.08.02.nn).
Fig. 3
X
2
9
°
5
2
' +
2
'
min. 1 mm
Summary of Contents for M20
Page 5: ...Technical engine data A1 M20 M601C en 31 10 2001 AA000103 1 1 Technical engine data...
Page 6: ...Governor data A1 04 en 18 02 2000 AA000097 1 1 Governor data not installed on CD Rom...
Page 11: ...Operating instructions A3 M20 M601C en 31 10 2001 AA000108 1 1 Operating instructions...
Page 30: ...Initial operation Engine A3 05 00 en 14 02 2001 BA000022 1 1 Initial operation...
Page 44: ...Operational supervision Engine A3 06 00 en 15 02 2001 BA000058 1 1 Operational supervision...
Page 64: ...Removal from operation Engine A3 07 00 en 16 02 2001 BA000094 1 1 Removal from operation...
Page 71: ...Danger of frost Engine A3 08 00 en 16 02 2001 BA000106 1 1 Danger of frost...
Page 83: ...Running in Engine A3 10 00 en 16 02 2001 BA000242 1 1 Running in...
Page 85: ...Fault tracing Engine A3 11 00 en 19 02 2001 BA000130 1 1 Fault tracing...
Page 91: ...Emergency operation Engine A3 12 00 en 19 02 2001 BA000142 1 1 Emergency operation...
Page 102: ...Operating media A4 en 31 10 2001 AA020105 1 1 Operating media...
Page 106: ...Regulations and care Engine A4 05 00 en 21 02 2001 BA000158 1 1 Regulations and care...
Page 137: ...Maintenance A5 en 31 10 2001 AA000026 1 1 Maintenance...
Page 166: ...Periodical schedule Heavy fuel A5 04 02 M20 en 31 10 2001 AA021679 8 8...
Page 242: ...Bearing Shells Inspection Evaluate A5 05 02 03 07 01 M20 en 13 06 1997 IB001449 3 4 02 1 2 3...
Page 243: ...Bearing Shells Inspection Evaluate A5 05 02 03 07 01 M20 en 13 06 1997 IB001449 4 4 02 4 5 6...
Page 435: ...Table of contents A6 01 en 31 10 2001 AA020050 1 1 Tools A6 Table of contents A6 01...