Volvo 164, 1970 Service Manual page 103

Fig . 3-57. Drivin g co ll a r fo r centrifuga l re g ul a to r
VOLVO
10331 9
2. Run the d istributor and set the protractor on the
test bench so that a marking comes opposite 0°
at such a low speed {be low 400 distributor ,r.p.m. )
that the , c entrifugal governor does not fundion.
Increase the speed slowly and read off the values
at the prescribed grad ua, t ions. A newly lubricated
distributor should first be run up to maximum
speed s' e veml times. Permissible tolerance for the
centrifugal regulator is
±
1°.
l,f the cenlfrifugal regulator curve is too high or
too low, this can be remedied by altering the
spring tension in the centrifugal regulator. To do
this, the distribul t or must be dismantled and the
distributor shaft I,ift, e d up (the breaker camshaft
does not need to be removed from the distributor
shaft). The screws holding the driving ,colIar are
then released, see Fig. 3-57. If the driving collar
is turned in the direction of rotation, the curve
rises, turning the driving collar opposite the di-
rection of rotation will lower Ifhe curve.
N.B. The regulator curve must not be adjusted
by bending the spring clamps of the driving coli ar.
Fig. 3-58. Eccentric for adjusting max. ignition drop
3 : 24
3. Run the distributor at low speed and adjust th e
protrador so t hat a mar ki ng lis obtained alf 0°.
Co n ned th e vac uu m hose to , t h e ba ke lite co nn ec-
tion on th e vacuum regulato r (th e primary d ia-
phragm). Increase th e vacuum gradually and rea d
off the values on the prescribed graduations. The
difference between the risingj.falling vacuum must
not exceed 1
%0.
A certain adjustment of the max.
reading can be obtained by slackening the screws
for the vacuum regulator and moving th e re-
gulator.
4. Mov, e over the vacuum hose to the metal pipe on
the vacuum regulator (the secondary diaphragm)
and check that the ignition drop mechanism is
fundioning satisfactorily. If the max. drop is too
great or too small, it can be adjusted by slacken -
ing the counternut and by turning the eccentric,
see Fig. 3-58.
FITTIN G
1. P,la ce the d istributor in position.
2. Press the distribu,tor downwards while turning the
distributor arm at the sa me time. When the distri-
butor goes down about 5 mm (3/16") and it is no
longer possible to turn the distributor arm, the
driving , c olIar of the distributor is then in the
slot on the distributor drive.
3. Turn the distributor housing so that it takes up
the same position it had before removal.
4. Connect the primmy lead. Fit on the ' distributor
cap.
5. Start the engine and set the ignition. (If the engine
does not start, turn the distributor housing until
it does so.)
~2L4W
Fig. 3-59. Flywheel damper with graduation for ignition setting