1968 Triumph HeraldFACTORY OEM SERVICE PROCEDURE

Ducellier Distributor Advance Specifications

NOTE: FOR ENGINE RPM & DEGREES, MULTIPLY SPECIFICATIONS BELOW BY 2.
DUCELLIER DISTRIBUTOR ADVANCE SPECIFICATIONS

Distributor (1) Identification Centrifugal Advance (Dist. Degrees & RPM) Vacuum Advance (Dist. Degrees & In. of Hg.)
Deg. RPM Deg. RPM Deg. RPM Deg. RPM Deg. In. Hg. Deg. In. Hg. Deg. In. Hg. Deg. In. Hg.
3994-A (2) 0-3 550 7 1/2-9 3/4 1500 9 1/2-11 3/4 2000 10 1/4-12 1/2 2100 ..... ..... ..... ..... ..... ..... ..... .....
4081-B (2) 1/2-2 1/2 800 6 1/4-8 1/4 1500 10 1/2-12 1/2 2000 14-16 2400 1/2-2 6.30 ..... ..... 4-6 7.87 6-8 8.66
4081-C (2) 1/2-2 1/2 800 6 1/2-8 1/4 1500 10 1/2-12 1/2 2000 12-14 2200 1/2-2 3.94 3-4 3/4 5.91 8 3/4-10 1/2 9.84 10-12 11.81
4155-B (2) 0-2 700 4-5 3/4 1500 5 1/4-7 2000 8 3/4-10 1/4 2500 ...... ...... ...... ...... ...... ...... ...... ......
4169-A (2) 0-2 1100 2 1/2-3 1/4 1500 5 1/2-6 1/4 2000 8 3/4-10 1/4 2500 ...... ...... ........ ...... ...... ...... ...... ......
4173-A (2) 0-2 900 5-6 3/4 1500 8 3/4-10 1/4 2000 10 1/2-12 2250 ...... ...... ...... ...... ...... ...... ...... ......
(3) 0 100 1 1/4-3 500 9 1/2-11 1/4 1500 13 1/2-15 1/2 2000 0 4.00 3-5 3/4 7.87 8 1/4-10 1/2 11.81 10-12 15.75
M-12 (4) Begin 1000 5 1500 12 2000 14 2100 Begin 5.91 2 3/4 7.87 6 9.84 8 11.81
M-43 (4) Begin 500 5-7 1000 9 1/4-11 1/4 2000 12 2650 Begin 4.33 ...... ...... ...... ...... 5 8.66
M-48 (4) 0-2 700 8 1/2-10 1/2 1500 11 1/4-13 1/4 2000 13 1/2-15 1/2 2500 0-2 5.91 1/2-3 1/2 7.87 ..... ...... 4 1/2-6 1/2 11.81
M-53 (4) 0-2 700 8 1/2-10 1/2 1500 11-13 2000 13 1/2-15 1/2 2500 0-2 5.91 3-5 9.84 ...... ...... 4 1/2-6 1/2 11.81
M-69 (4) 1 3/4 700 6 1000 12 1500 17 2500 ...... ...... ...... ...... ...... ..... ...... ......
M-70 (4)(6) 0-2 1/2 500 10-12 1200 12-14 2000 14-15 2650 ...... ...... ...... ...... ...... ...... ...... ......
(5) Begin Begin 500 4 1000 8 1500 17 2100 Begin 4.50 2 6.50 5 1/4 12.00 8 1/2 16.50
A65/C33 (7) Begin 700 5 900 13 1/2 1275 17 1/2 2250 Begin 2.87 7 7.87 9 1/2 11.81 10 12.60
A67/C34 (7) Begin Begin 525 11 1150 13 1/2 2000 14 2250 Begin 3.00 1/2 5.00 4 1/4 10.00 5 1/2 13.00
A94/C34 (7) Begin 500 8 800 15 1/2 2000 18 2400 Begin 3, 00 1 1/2 5.00 4 1/4 10.00 5/2 13.00
A96/C33 (7) Begin 650 11 1375 15 2000 16 1/4 2300 Begin 2.87 7 7.87 9 1/2 1 1.81 10 12.60
RK/RO (7) Begin Begin 450 4 1/2 1000 8 1500 12 1/2 2000 Begin 5.91 5 1/4 9.84 7 1/2 1 1.81 11 14.17
WW/RO (7) Begin 500 4 1/2 1500 6 3/4 2000 9 2500 Begin 5.91 5 1/4 9.84 7 1/2 11.81 11 14.17
XC/XD (7) Begin 750 3 1000 8 1/2 1500 13 1950 2 1/2 7.87 5 1/4 9.84 7 1/2 11.81 13 15.75
R234/D59 (7) Begin 450 1 1/2 880 14 1500 18 2600 Begin 4.29 ...... ...... 5 11.81 7 19.69
R235/D59(7) Begin 500 8 1000 12 1500 15 2000 Begin 4.29 ...... ...... 5 1 1.81 7 19.69
R236/C34 (7) Begin 500 11 1000 14 1/2 2000 17 2750 Begin 3.00 1 1/2 5.00 4 1/4 10.00 5 1/2 13.00
R239/D59 (7) Begin 0 7 850 12 1/2 1500 20 2000 Begin 4.29 ...... ...... 5 1 1.81 7 19.69
R241/D60 (7) Begin 500 6 1000 14 2000 16 2250 Begin 3.31 7 8.66 ...... ...... 9 1/4 14.17
R242/C34 (7) Begin 500 7 800 13 1500 21 2500 Begin 3.00 1 1/2 5.00 4 1/4 10.00 5 1/2 13.00
R259/C33 (7) Begin 750 13 1400 16 2000 19 2500 Begin 2.87 7 7.87 9 1/2 11.81 10 12.60
S11915 (8)(9) 0-2 300-550 4 3/4-7 1000 10-12 1500 14-16 2000 1/2-2 5.91 3 1/2-5 7.87 6 1/2-8 9.84 9-10 1/2 11.81
S11915 (8)(10) 0-1 150 4 1/2-5 3/4 500 7 3/4-9 750 10 1/2-11 1/2 1000 0-1 3.91 ...... ...... 3-4 1/2 7.90 7-9 11.81
S34353 Begin 500 ...... ...... 5-6 1000 16-17 2050 Begin 3.15 ........ ...... 1 3/4-3 3/4 7-87 5-7 11.81
(1) Distributors within this table are identified by various numbers or code letters, therefore, be certain to check tariff number explanations before proceeding with tests on a particular distributor.
(2) Ducellier Part Number.
(3) Part No. or I.D. No. not available. This distributor used on Citroen Model ID19 after Sept. 1962.
(4) This number, stamped on distributor, denotes advance curve to be used.
(5) Part No. or I.D. No. not available. This distributor used on some Peugeot 404 Models.
(6) Vacuum Retard, 0-5° at 9.84" to 13.77" of Hg.
(7) Curve Identification (Stamped on Distributor) - Letters and/or numbers left of the slanted line identify centrifugal curve and letters and/or numbers right of the slanted line identify vacuum curve.
(8) Simca Part Number.
(9) Early Models.
(10) Late Models.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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