556 Datasheet, PDF (1/2 Pages) Cornell Dubilier Electronics – Computer Grade, Axial Leaded, Aluminum

INSTALLATION INSTRUCTIONS
FORM 1411 (REV. D) 8/08
UNILITE^® DISTRIBUTOR FOR
1936-69 HARLEY DAVIDSON^®
BIG TWIN MOTORCYCLES
Part No. 556
NOTE: THIS DISTRIBUTOR WILL NOT FIT FLAT HEAD OR SPORTSTER^® ENGINES.
IMPORTANT
A 1966-69 HARLEY DAVIDSON^® DISTRIBUTOR CLAMP (ORIGINAL OR AFTERMARKET)
IS REQUIRED TO INSTALL THIS DISTRIBUTOR. BECAUSE THE UNILITE^® MODULE USED
WITH THIS DISTRIBUTOR REQUIRES 7-16 VOLTS, A 12 VOLT ELECTRICAL SYSTEM IS
ALSO REQUIRED.
GENERAL INFORMATION
Any coil or combination of coils with a total primary resistance of at
least 2.0 ohms can be used with this distributor. We recommend a
2-3 ohm coil for racing and a 3-4 ohm coil for street use. A coil with
4-5 ohms resistance may be used. However, performance may be
reduced, even in street applications. NOTE: Check the charging
system and make sure that it is producing no more than 16 volts.
We recommend a spark plug gap of .040” when using a 2-3 ohm
coil. A gap of .030” is recommended when using a 3-4 ohm coil.
An optional spring kit (PN 29014) is available for this distributor.
The kit gives you a choice of 14 different advance curve settings.
INSTALLATION
Step 1
Turn the ignition switch to the off position. With the point distributor still
in place and correctly timed, rotate the engine until the points begin to
open on the front cylinder lobe. The front cylinder lobe is the narrower
of the two.
If the point distributor is not installed, rotate the engine to the begin-
ning of the compression stroke. Locate the timing hole. Continue
rotating the engine until the advance mark is visible through the
timing hole.
Step 2
Remove the ground cable from the battery. Remove the point wire at
the coil. Remove the point distributor.
FIGURE A
BUTTON HEAD SCREW, 3 PLACES
SHUTTER WHEEL
UNILITE^® MODULE
O-RING
THRUST WASHER
GEAR
ROLL PIN
TOP
GROMMET
HOUSING ASSEMBLY
ADVANCE ASSEMBLY
INCLUDES YH ADVANCE
AND DISTRIBUTOR SHAFT
.010" END PLAY
1