Operation Manual

Job Card No.:
Engine:
Filing No.:
Valve Seat Ring and Valve Cone
0178-08-297 6506
01.07.01 Page 2 of 2
S/BVM 628
© 0484
- in the areas X and Y
- no interruption of the (shiny) chrome layer
- between the zones X and Y (Fig on Page 2)
- no corrosion pittings deeper than 0,2 mm,
- stem diameter at no point < 15,5 mm.
- Out-of truth (deviation) of the cleaned disc edge relative to stem not exceeding 0,2 mm. To measure place
stem on knife-edges at points A and B. On no account straighten valve cones!
Renew valve cones, if the out-of-truth is excessive.
The seats of the valve cones are to be reworked if:
- the cleaned seat is not free from carbon scars, blow-bys, pittings and other damage (check with
magnifying glass) or
- the out-of-truth (deviation) of the otherwise perfect seat relative to the stem is > 0,1 mm.
Checking valve-seat rings
The seat rings can be re-used if the following pre-
conditions are fulfilledi:
- Seats free from burnt spots, blow-bys, cracks or
pounding marks.
The seat surface of the seat rings is to be reworked in
installed condition - in the cylinder head - if:
- the cleaned surface is not free from carbon scars,
blow-bys, pittings, scorning, shoulders (see Fig.),
corrosion and other damage (check with mag-
nifying glass)
In the case of corrosion damage to the inlet valve
seat rings, check also the charge air pipe for salt
deposits and corrosion and the charge air cooler for
leaks (see Job Card 06.02.01).
Reconditioning
This reconditioning work may only be done by
DEUTZ Service workshops which are especially
equipped to carry out such work.
245 Exhaust valve
205 Inlet valve
285 Exhaust valve
215 Inlet valve
befor reworking
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