Bill's Dual Distributor

Dual Distributor With Drive Gear Removed

The drive gear is removed by carefully drilling out the solid rivet pin. The pin is soft and drills easily. The trick is to line up the dual distributor by mounting the lower shaft of the casting in a set of soft jaws in a vise and also wedging the drive gear so that it does not turn while also lining up the rivet on two axis. The pin for the drive gear cannot be punched out. Setting the pin causes it to expand in the hole making that impossible. It is best to unload the side force placed on the pin by the Belleville washer by using an Irwin clamp. This becomes apparent when the pin is nearly drilled to its outside diameter.

Dual Distributor

The exterior got a preliminary washing making it cleaner to handle.

Dual Distributor

The exterior got a preliminary washing making it cleaner to handle.

Primary Shaft End Cover

The end cover got drilled so that a pick could be inserted as shown in the next photograph. The end cover metal is soft and thin.

Primary Shaft End Cover

A pick is inserted to lift the end cover out. A piece of aluminum sheet is placed under the pic to prevent marking the dual distributor casting. Sometimes a stronger pick is required.

Primary Shaft Lower Bearing & Circlip

Unloading The Primary Shaft Circlip

A Belleville washer applies tension to the assembly to preload the angular contact bearing. It is far easier to expand the circlip when it does not have a side load on it making it easier to remove.

Primary Shaft Shims & Circlip

Primary Shaft Upper Bearing

Primary Shaft Toothed Gear, Washer & Belleville Washer

Primary Shaft Assembly

Secondary Shaft Circlip

Secondary Shaft Circlip

Secondary Shaft Locating Pin

Secondary Shaft Locating Pin

Dual Distributor Connector

Once the retaining clip is removed, the black connector housing can be pulled out of the dual distributor casting. BUT before doing do, use a small flat bladed screw driver to press against the center connector pin. This causes the 3-pin connector housing to slide out of the black connector housing as it is pulled off. The three connector wires are thin and fragile.

Dual Distributor Connector

Secondary Shaft Upper Bearing

Secondary Shaft Assembly

Secondary Shaft Toothed Gear, Washer & Belleville Washer

Secondary Shaft Connector

The connector is tucked away between the plate and plastic cover when removing the secondary shaft from the distributor housing.

Secondary Shaft Connector

The connector is tucked away between the plate and plastic cover when removing the secondary shaft from the distributor housing.

Dual Distributor Drive Belt

To remove the toothed belt, remove the 5 socket head cap screws that hold the upper and lower castings together. There are locating pins at the left and right sides of the castings. Use a plastic faced hammer to tap the castings apart tapping each side in sequence.

Lower Casting

Lower Casting

Primary Shaft Upper Bearing

Secondary Shaft Upper Bearing

Primary Shaft Lower Bearing

Secondary Shaft Lower Bearing

Primary Shaft End Cover Stakes

The three stakes protruding into the bore need to be filed flush with the bore before removing the lower primary shaft bearing. A jeweller's oval file was used. Not filing the stakes flush might/will cause the casting to crack when trying to remove the lower primary shaft bearing. This happened to a local owner when failed to do so. See the last photo in this series.

Upper Casting

Upper Casting

Upper Casting

Secondary Shaft Lower Bearing & Blind Hole Bearing Puller

Secondary Shaft & Electronic Plate Assembly

After the upper circlip is removed, the upside down "dish" can be removed by holding the assembly and tapping the top of the shaft with a plastic faced hammer. Do so with the opening of the dish located at the sensor as shown to prevent any damage to these parts It is best to spray the exposed end of the shaft with Liquid Wrench and let it sit overnight because corrosion could have formed between the parts. And even at that, it took a few dozen taps with the plastic faced hammer to get it to slide off. Do not lose the small locating pin. If you do, it is 2.15 mm in diameter and 4.75 mm long. The shank from a number 44 or 45 drill bit cut to length would work.

Secondary Shaft With Electronic Assembly Removed

Secondary Shaft With Electronic Assembly Removed

Secondary Shaft Parts Detail

After the screw (under the felt pad) is removed at the top of the secondary shaft, the parts shown should all be cleaned.

Secondary Shaft Parts Detail

Secondary (and primary) Shaft Weights

The plastic guides have been reinstalled.