Rotunda Re-881 Test Connedions - Lincoln Continental 1964 Shop Manual

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PART 9-1-GENERAL IGNITION SYSTEM SERVICE
9-9
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81993-A
FIG.
18-Rotunda RE-881 Test Connedions
lines up with the pointer. Now
tighten the hold down bolt and check
the timing.
RE-651 Tester
1. Turn the rpm selector to the
1 000 position.
2.
Depress the advance timing
pushbutton.
3. Start the engine and allow
it to
warm up.
4. Operate the engine at the speci-
fied idle speed.
5. Turn the advance knob until
the ignition advance meter reads 0°.
6. Point the timing light toward
the timing pointer. The desired
tim~
ing mark should line up with the
pointer. If it doesn't, loosen the dis-
tributor hold down bolt and rotate
the distributor until the desired tim-
ing mark and pointer line up. Tighten
the distributor hold down bolt and
check the timing.
RE-881 Tester. The method of
testing is the same as the RE-651
tester with the exception of Step
1
which should (for the RE-881) read
''turn the rpm selector to the 800
position."
SUPERIMPOSED PRIMARY
PATTERN
Procedure
RE-235 TESTER
1. With the engine running at
15
KV
10
5
A
8
c
I
K.,o
I
fr
I
-j
1
~
I""J5 io
.}5
2
1
0
PLUG
LINE
D
.,,...,
1
DWELL .....
1~
8CVL.
81994
FIG.
19-Normal
Superimposed Primary Pattern
30
KV
25
20
15
10
5
0
-A
1000 rpm, turn the test selector
switch to the primary (PRI.) posi-
tion.
2. ·Adjust the parade control to
position the left end of the pattern
at the left vertical line on the screen.
3. Adjust the expand control so
that the right end of the pattern is
at the right vertical line on the
screen.
RE-651 TESTER
1. Turn the rpm selector to the
5000 position. Start the engine and
adjust it to 1000 rpm.
2. Depress the PRI pushbutton on
the console panel.
3. Adjust the parade and expand
controls to position the left end of
the pattern at the left vertical line
on the screen and the right end of
the pattern at the right vertical line
on the screen.
RE-881 TESTER. The test pro-
cedure for the RE-8 81 is the same
as the test procedure for the RE-651
except for the setting of the rpm
selector. For the RE-881 tester, the
rpm selector is turned to the 1600
position.
Results. A normal test pattern is
shown in Fig. 19.
Point A indicates the spark plug
line which is the time when the
points open. At
B,
the coil energy is
used up sufficiently so that the plug
no longer fires and only the energy
stored in the breaker point condenser
remains. This coil/ condenser oscilla-
tion which is indicated in the pattern
between B and C is completely used
up at C which is the points close
mark. The portion of the pattern
between C and D is the points close
time, which is cam angle or dwell
time. At D, the points again open
and the firing cycle repeats.
If points A and C are below the