7 4
18-10-2004
18-10-2004
00
REG. CODE
1-5302-662
MODEL N°
51092
DATE OF ISSUE
REVISION
DATE
ENDORSED
COMPILER TECO/ATI
XI
204
205
206
207
208
209
A
B
C
D
4,080÷4,090
4,091÷4,100
4,101÷4,110
4,111÷4,120
4,100÷4,109
4,110÷4,119
4,120÷4,129
4,130÷4,140
0,010÷0,029
0,010÷0,028
0,010÷0,028
0,010÷0,02
1
2
Ø 27,50÷27,52
0,01÷0,05
Ø 27,53÷27,55
Class
symbol
Color
Prechamber
cap thikness
Prechamber
seat depth
Recess in
cylinder head
Yellow
Red
Blue
White
DISASSEMBLY/REASSEMBLY
See table
Precombustion chamber – disassembly and reassembly
To extract the precombustion chamber, top the injector seat with a purch (Fig. 204) from the injector seat.This expulsion method
causes damages to the precombustion chamber, therefore it must be replaced every time it is extracted.Before assembling the
new precombustion chamber, the depth of the seat inside the head shall be measured (Fig. 205÷206); the resulting
measurement will determine the most appropriate precombustion chamber of the four of different height that are available.In
order to identify them, each precombustion chamber is marked with a paint brush-stroke in different colors according to its
height (as indicated in the table).The precombustion chamber shall be inserted into the seat so that the dowel 1 coincides
with the appropriate seat 2 (fig 207).
The interference between the precombustion chamber external diameter and the seat internal diameter shall be 0.01÷0.05.The
precombustion chamber housing shall conform to the specifications shown in the related table with respect to the head surface
(fig. 209).
Piece name
Nominal
dimension
Interference
Combustion prechamber housing inter. diam
Combustion prechamber exter. diameter
Содержание LDW 422 SERIES
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