Mallory A557 Billet aluminum distributor Datasheet

FORM 1627 07/08
INSTALLATION INSTRUCTIONS
BY ACCEL MOTORCYCLE PRODUCTS
BILLET ALUMINUM DISTRIBUTOR WITH ELECTRONIC
ADVANCE AND ADJUSTABLE REV LIMITER FOR 1936-69
HARLEY BIG TWIN MOTORCYCLES
PART NO. A557
ELECTRICAL SYSTEM
A 12 volt electrical system is required. Check
that the charging system is working properly and
not producing over 16 volts.
DISTRIBUTOR CLAMP
A 1966-69 style distributor clamp (original or
aftermarket) is required.
MODULE
This distributor uses an Accel Single/Dual Fire
Ignition module part number 35496. See the
enclosed form “Instruction Sheet Single/Dual
Fire” for instructions on wiring, adjusting the rev
limiter and selecting an advance curve.
Step 4
Install the distributor base assembly in the
engine with the screw holes and shutter wheel
positioned as shown in Figures 1 and 2. It may
be necessary to pull the distributor out, turn the
shaft and reinstall to get the shutter wheel at the
approximate angle shown. The slots should be
at about the11 o’clock and 7 o’clock positions.
The screw holes should be at the 9 o’clock and
3 o’clock positions.
FIGURE 1
FIGURE 2
COIL(S)
A coil(s) with a total primary resistance of 2 to 4
ohms is recommended.
INSTALLATION
Step 1
Turn the ignition switch to the off position.
Rotate the engine until it is on the compression
stroke for the front cylinder. Continue to rotate
the engine until the TDC mark is visible through
the timing hole. (see repair manual if necessary).
Step 2
Remove the existing distributor if still in the
engine.
Step 3
Remove the two button head screws from the
top of the Mallory distributor. Pull the top cover
off the distributor. Remove the two hex standoffs
and pull the module and upper housing off the
distributor base assembly. Adjust the switches
on the module for the desired advance curve
and rev limit.
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Step 5
Install the distributor clamp and tighten the
clamp bolt lightly so the distributor can still be
rotated.
Step 6
Set the upper housing on the base assembly as
shown in figure 3. (The upper housing will only
install one way because of the locating screw)
Rotate the base assembly slightly if necessary
so that the slot in the shutter wheel lines up with
the slot in the upper housing. Tighten the
distributor clamp.
1
FIGURE 3
FIGURE 5
Step 7
Install the module in the upper housing using the
two hex standoffs. Install the module so the
standoffs are in the middle of the adjustment
slots. A drop of removable Loctite on the threads
is recommended to prevent the standoffs from
vibrating loose. See Figure 4.
FIGURE 4
Step 9
Run the wire harness between the pushrod
tubes and the cylinders and up to the coil. Try to
keep the harness away from the hot cylinder
fins. Connect the wires to the proper places as
indicated in the “Single Fire/Dual Fire Ignition”
instruction sheet.
Step 10
The timing should now be close enough to start
the engine. If not, loosen the distributor clamp
slightly and turn the distributor slightly either
direction until the engine starts.
Step 8
Install the top cover using the two button head
screws so that the wire harness will exit the top
cover between the pushrod tubes and the
cylinders. A drop of removable Loctite on the
threads is recommended to prevent the screws
from vibrating loose. See Figure 5.
Step 11
Once the engine has warmed up a few minutes
the timing can be set with a timing light (see
repair manual if necessary). Adjustments to
timing can be made by removing the top cover
and rotating the module or by rotating the entire
distributor. Using a combination of both methods
will usually allow the distributor to be timed
correctly AND be positioned so the distributor
is at an angle that allows the wire harness to run
smoothly between the pushrod tubes and the
cylinders. If not, remove the distributor and
rotate the shaft one gear tooth and reinstall.
MALLORY IS A DIVISION OF PRESTOLITE PERFORMANCE
10601 MEMPHIS AVE. #12, CLEVELAND, OH 44144
216.688.8300
FAX 216.688.8306
www.accel-motorcycle.com
FORM 1627
07/08
Made in U.S.A.
Printed in U.S.A.
2
FORM 97140090 (REV A) 6/08
INSTRUCTION SHEET
SINGLE/DUAL FIRE IGNITION
Part #35496
RED = POWER
BLACK = GROUND
ORANGE = VACUUM OPERATED ELECTRONIC SWITCH
GREEN = TACHOMETER
YELLOW = FRONT CYLINDER COIL
BLUE = REAR CYLINDER COIL
Switch Functions:
Position 1 controls the single fire/dual fire mode:
Switch position 1
off-dual fire
on-single fire
Switch position 2-4 controls the Rev Limit:
Switches in the On Position
Rev. Limit Produced
6272
4
6528
3
6784
3, 4
7040
2
7296
2, 4
7552
2, 3, 4
Stock Applications
4, 8
On all others off. If using single fire mode add 1 on.
Switch positions 5-8 control the advance curve.
Switches in the ON position - 8
45
ADVANCE (DEG)
36
27
18
9
0
0
1375
2750
4125
5500
6875
8250
ENGINE SPEED (RPM)
ACCEL
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1
Switches in the ON position - 7
45
ADVANCE (DEG)
36
27
18
9
0
0
1375
2750
4125
5500
6875
8250
5500
6875
8250
ENGINE SPEED (RPM)
Switches in the ON position - 7, 8
45
ADVANCE (DEG)
36
27
18
9
0
0
1375
2750
4125
ENGINE SPEED (RPM)
2
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ACCEL
Switches in the ON position - 6
45
ADVANCE (DEG)
36
27
18
9
0
0
1375
2750
4125
5500
6875
8250
5500
6875
8250
ENGINE SPEED (RPM)
Switches in the ON position - 6, 8
45
ADVANCE (DEG)
36
27
18
9
0
0
1375
2750
4125
ENGINE SPEED (RPM)
ACCEL
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3
Switches in the ON position - 6, 7
45
ADVANCE (DEG)
36
27
18
9
0
0
1375
2750
4125
5500
6875
8250
5500
6875
8250
ENGINE SPEED (RPM)
Switches in the ON position - 6, 7, 8
45
ADVANCE (DEG)
36
27
18
9
0
0
1375
2750
4125
ENGINE SPEED (RPM)
4
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ACCEL
Switches in the ON position - 5
45
ADVANCE (DEG)
36
27
18
9
0
0
1375
2750
4125
5500
6875
8250
5500
6875
8250
ENGINE SPEED (RPM)
Switches in the ON position - 5, 7
45
ADVANCE (DEG)
36
27
18
9
0
0
1375
2750
4125
ENGINE SPEED (RPM)
ACCEL
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5
Switches in the ON position - 5, 7, 8
45
ADVANCE (DEG)
36
27
18
9
0
0
1375
2750
4125
5500
6875
8250
5500
6875
8250
ENGINE SPEED (RPM)
Switches in the ON position - 5, 6
45
ADVANCE (DEG)
36
27
18
9
0
0
1375
2750
4125
ENGINE SPEED (RPM)
6
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ACCEL
Switches in the ON position - 5, 6, 8
45
ADVANCE (DEG)
36
27
18
9
0
0
1375
2750
4125
5500
6875
8250
5500
6875
8250
ENGINE SPEED (RPM)
Switches in the ON position - 5, 6, 7
45
ADVANCE (DEG)
36
27
18
9
0
0
1375
2750
4125
ENGINE SPEED (RPM)
ACCEL
www.accel-motorcycle.com
7
FRONT CYLINDER
SINGLE FIRE WIRING
IGNITION SWITCH
12 VOLTS
COIL
YELLOW
RED
REAR CYLINDER
BLUE
IGN. MODULE
GREEN
TACH
TAPE OFF IF
NOT USED
ORANGE
BLACK
GROUND
V.O.E.S.
FRONT CYLINDER
DUAL FIRE WIRING
IGNITION SWITCH
12 VOLTS
COIL
RED
REAR CYLINDER
YELLOW
BLUE
IGN. MODULE
GREEN
TACH
TAPE OFF IF
NOT USED
ORANGE
BLACK
GROUND
V.O.E.S.
ACCEL MOTORCYCLE IS A DIVISION OF PRESTOLITE PERFORMANCE
10601 MEMPHIS AVE #12, CLEVELAND, OH 44144
216.688.8300
FAX 216.688.8306
8
www.accel-motorcycle.com
FORM 97140090
(REV A) 6/08
Made in U.S.A.
Printed in U.S.A.
ACCEL
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