- 31 -
4
33
34
35
36
37
The high-pressure pipe union must be tightened to the injector
union to 20 ÷ 25 Nm using a torque wrench.
Disassembly / Reassembly
Valves
Components:
1
Intake valve
1a
Exhaust valve
2
Lower spring collar
3
Valve stem sealing ring
4
Spring
5
Upper spring collar
6
Three-groove half collets
Te remove half collets firmly press down the special tool 1460 - 113
as shown in the figure 36.
Cylinder Head
Caution – Warning
Do not demount or remount while hot as this could lead to defor-
mations.
If the head surface is distorted, grind it by removing up to 0.3 mm
thickness. When reassembling, before tightening, make sure that the
rocker arm lubrication hose is firmly lodged into holes. The cylinder
heads must be tightened with the exhaust or intake manifold mounted
to keep them lined up. Always replace the copper seal between the
cylinder head and the cylinder that determines clearance volume; see
page 34 for the choice of thickness. See page 32 for how to mount
the spring on the tappet rod protection pipe.
The cylinder head fastening nuts must be tightened gradually to 55
Nm and in the sequence
1
,
2
,
3
,
4
; see fig. 35.
Injector protrusion
It is only possible to check injector protrusion with the cylinder head
disassembled.
The end of the nozzle must be 3 ÷ 3,5 mm with respect to the head
surface
A
.
Protrusion is adjusted by adding or removing copper seals
B
which
are supplied at a thickness of 0,5 and 1 mm.
KD Workshop Manual_cod. ED0053029350_
1° ed
_ rev.
00
Summary of Contents for KD 626/3
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