Page 118 - Vauxhall 20-60 H.P. (R Type) Chassis Shop Manual

VAUXHALL 20-60 SHOP MANUAL

a special tool should be used as shewn in Fig. 32. Proceed as follows:—
Remove distributor cap and pull off rotor from end of cam spindle. Place
synchronising tool on the shaft with the ‘M’ side of the spring clip in the
slot, and turn the shaft in a clockwise direction, viewing it from the top,
until the graduations on the ‘M’ side of the tool are near the slot in the rim
of the distributor base. Continue to turn the shaft until the breaker arm
‘A’ just breaks contact and note graduation on tool that aligns with the
approaching edge of the slot. Again, turn shaft in same direction until the
same graduation on the ‘N’ side aligns with the same edge. Loosen screws
‘G’ and ‘H’ and turn screw ‘J’ until breaker arm ‘D’ just breaks contact.
Check this by rotating the shaft again. Tighten screws ‘G’ and ‘H’.

If, however, a synchronising tool is not available, turn the engine over by
hand until the T.D.C. mark on the flywheel corresponds with the mark on
the side of the flywheel inspection hole ( Fig. 27 ) with No. 1 piston on its
compression stroke, i.e., both valves will be closed. Fully retard the ignition
and slacken distributor clamping bolt ( Fig. 27 ). Turn distributor body until
the contacts ( ‘A’ Fig. 27 ), are on the point of opening, thoroughly tighten
distributor clamping bolt. Turn engine over again by hand through one
complete revolution bringing the T.D.C. mark on the flywheel again into
line with the mark on the side of the flywheel inspection hole. No. 6 piston
will now be at T.D.C. on its compression stroke. Slacken screws ( ‘G’ and
‘H’, Fig. 32 ) and turn screw ( ‘J’ Fig. 32 ) until breaker arm ( ‘D’, Fig. 32 )
just breaks contact. Tighten screws ‘G’ and ‘H’.

If the eye cannot detect the instant the points open, connect an ammeter
in the circuit at the distributor terminal with the ignition switched on.
Immediately the ammeter needle drops back to zero, the points are
open.

TO REMOVE

( See Figure 32 )

– Disconnect breaker arm springs.
SECTION
529 – Remove spring clip locating position of each breaker arm bearing on its
spindle, and the arms can then be lifted out.

– Remove screws ‘E’ and ‘B’ and the stationary points can be removed.

INSPECTION

– Examine breaker arm rubbing blocks and contact points. If excessive wear
SECTION is evident, the arms should be replaced by new ones. If it is necessary to
530 replace the*stationary point assembly, care must be taken, as these are

not interchangeable — the distance from the centre of the point to the
bottom face of the plate being greater on the front stationary point (
i.e., the one nearest the radiator ) than on the rear.

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