Note: Before you begin disassembling the distributor, find out if replacement parts are available and how much they cost. It may be more cost effective to replace the entire distributor assembly.
Models 14 NV
Disassembly
1. Remove the distributor as described in Chapter 18, proceed as follows.
2. Remove the distributor runner and plastic shield.
3. The top support plate can be removed by unscrewing the two mounting screws, however, other than the vacuum block, no other parts for the distributor are accessible and no adjustment is required.
4. If required, the vacuum unit can be removed by unscrewing the two screws and disengaging the lever from the support plate. Note that the screws are different lengths, the longer screw also secures one of the brackets of the breaker-distributor cover.
Inspection
5. The vacuum chamber can be tested by creating a vacuum in the vacuum channel, the drive rod should move inside the block.
After the suction stops, the drive rod should return to its original position.
If the rod does not move as described, replace the vacuum chamber.
6. Check the condition of the breaker-distributor cover to ensure there are no signs of contact corrosion or burnt traces in the form of a thin black line between the contacts.
Check that the carbon brush in the center of the cover moves freely. Replace the cover if necessary.
7. If the metal part of the runner is badly burnt or weakened, replace it. If there is light carbon deposits or corrosion; this can be cleaned with a fine file.
8. Check the condition of the O-ring at the rear of the distributor housing, replace if necessary.
Assembly
9. Assembly is carried out in the reverse order. Make sure that the vacuum chamber control lever is correctly engaged with the protrusion on the support plate.
10. Install the distributor as described in Chapter 18, and then check and, if necessary, adjust the ignition timing as described in Chapter 21.
Models 16 SV
Disassembly
11. After removing the distributor as described in Chapter 18, remove the distributor rotor and, on a Bosch distributor, remove the plastic shield.
12. Using a punch, carefully knock out the cylindrical pin that secures the plastic drive bearing to the rear of the distributor shaft (see illustration).
13. Remove the drive bearing, remove the thrust washers from the end of the shaft (see illustration).
14. Remove the shaft (together with the trigger blade) from the distributor housing, remove the thrust washers from the shaft (see illustration).
15. On the Lucas distributor, remove the spring clip from inside the housing, then remove the terminal block.
Disconnect the small wiring connector from the inside of the terminal block (see illustrations).
16. Unscrew the screws, remove the sensor plate from the distributor housing (see illustrations).
Inspection
17. Inspect the distributor cap and distributor rotor as described in steps 6 and 7. Inspect the O-rings at the rear of the distributor housing and on the rear of the shaft, replace if necessary.
Assembly
18. Assembly is carried out in reverse order.
Make sure the thrust washers are positioned correctly.
Please note that the drive bearing must be installed so that the drive tab on the bearing fits into the groove in the top of the distributor shaft (it is possible to install the drive bearing 180° from this position).
19. Install the distributor as described in Chapter 18, and then check and, if necessary, adjust the ignition timing as described in Chapter 21.
Models with two overhead camshafts
20. The distributor cover and distributor rotor can be checked as described in points 6 and 7.
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