Specifications
El
MAINTENANCE
ADJUST
DUCELLIER DISTRIBUTOR
-
4-cylinder
Petrol engine
Service
tool:
1861308
Check and Adjust Dwell Angle
NOTE:
The following six instructions can only be
carried out using engine diagnostic equipment and
special
tool
18G1308.
1.
Start the engine, disconnect the vacuum pipe from
the vacuum unit and with the engine idling check
the dwell angle
-
see data. If adjustment is
required stop the engine, remove the distributor
cap, rotor arm and dust cover, slacken the fixed
contact retaining screw and using the eccentric
-
post
end of the special tool, as illustrated, make an
appropriate adjustment. Tighten the retaining
screw, reassemble the distributor and recheck the
dwell angle.
Check and adjust dwell variation
NOTE:
A
dwell variation outside the accepted tolerance
-
see data
-
can be caused by a mechanical fault
or
wear within the distributor.
This
may be checked as
follows:
2.
Disconnect the vacuum advance, start the engine
and increase the speed to
2000
r.p.m.
A
variation
outside the tolerance given in data indicates that
the distributor has a mechanical fault which cannot
be
rectified by adjustment.
-I
7.
!f
the
k’aiiatioi;
is
acceptabk, reconnect
the
vacuum pipe, start the engine and increase the
engine speed to
2,000
r.p.m. and release the
throttle.
Check the dwell variation and
if
necessary
adjust by tuming the eccentric
‘D’
post with the
special tool (female
‘D’
end). Setting the dwell for
minimvin variation may alter the basic setting and
this
must
be rechecked at idle speed.
16
Check vacuum advance
NOTE:
If
the vacuum unit has been removed
or
the
distributor dismantled, the vacuum advance must be
checked and
if
necessary adjusted.
4.
Disconnect the vacuum pipe and connect a vacuum
pump
to
the unit.
5.
Start and run the engine at idle speed and using a
timing light, slowly increase the vacuum and note
the point at which vacuum advance starts and
compare the figure with that given in data.
6.
Adjustment
of
the serrated cam, with the special
tool, one tooth at a time, will alter the point at
which vacuum advance starts.
Ft
6