Distributor reassembly - driving dog

rcroane

Hello,

I took apart a 205M distributor and I'm a little confused about the Bentley instructions for reinstalling the driving dog. It says to "install the driving dog so that the lugs are offset towards the mark on the housing". I don't understand what it means by "offset towards the mark on the housing". I assume the "mark" is the notch on the rim of the housing.

Also, I see reference to axial play. What does this refer to?

Thanks for any help.

Glenn · Posted: Thu Mar 05, 2015 8:12 am Post subject:

The drive can be put on 2 ways, once is correct and the other is 180* off. Since you didn't not the way it was before, i say install it and if the engine doesn't start, rotate it 180*.
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Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
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spanky324 · Posted: Thu Mar 05, 2015 8:24 am Post subject:

50/50 Chance your right !Next time mark it before taking apart!

rcroane · Posted: Thu Mar 05, 2015 8:46 am Post subject:

What do I mark? This is a spare distributor. It has never been in my car.

Thanks.

Glenn · Posted: Thu Mar 05, 2015 8:47 am Post subject:

Put a mark on the drive and the shaft. before you take it apart.
_________________
Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"

Member #1009

#BlueSquare

rcroane · Posted: Thu Mar 05, 2015 9:08 am Post subject:

OK....dumb question. I see that the two "teeth" on the dog have an angled surface. Are you saying that if someone were to assemble a distributor from a pile of parts, there is no way to determine the orientation of the dog other than trial and error (i.e. 50/50 chance of getting it right the first time)? What if someone were to install a NOS distributor....would there be the same issue?

Thanks!

60ragtop · Posted: Thu Mar 05, 2015 9:29 am Post subject:

not a dumb question
look at the#1 notch in the cap and how the cogs are and they should be orientated that the fat side is away from the # 1 notch
They are this way on the 3 i quickly checked
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Rick
Certified Mechanic by the State of Michigan in 1977
ASA certified in 1987
Certified Hunter Wheel Alignment Master Technician 1986

Glenn · Posted: Thu Mar 05, 2015 9:34 am Post subject:

60ragtop · Posted: Thu Mar 05, 2015 9:35 am Post subject:

yeah but we are not talking of type 3 Wink

general observation since we are in the 58-67 bug forum
_________________
Rick
Certified Mechanic by the State of Michigan in 1977
ASA certified in 1987
Certified Hunter Wheel Alignment Master Technician 1986

rcroane · Posted: Thu Mar 05, 2015 9:42 am Post subject:

Ah ha.....I think I see now. I hadn't noticed before that the teeth on the dog are offset to one side. By "fat side", I assume you mean the larger part of the "circle" that the teeth sit on? And if I'm looking at the distributor from the bottom, the fat side should be to the right? This would seem to correspond to what Bentley says about the cogs being offset towards the mark.

Thanks.

KTPhil · Posted: Thu Mar 05, 2015 3:09 pm Post subject:

Check this picture, and then position your drive dog and distributor shaft so the rotor points to the slot on the body lip, making sure the advance can is located so it clears the fuel pump when installed.

Image may have been reduced in size. Click image to view fullscreen.

thomas. · Posted: Thu Mar 05, 2015 3:25 pm Post subject:

Photo I had in my gallery. I used a spring loaded punch to mark the dist. before disassembly

rcroane · Posted: Thu Mar 05, 2015 5:58 pm Post subject:

Sorry guys, but I'm still confused. Looking at the picture from Bentley above would put the dog in a position that the lugs are offset AWAY from the notch on the rim. But, the directions in Bentley for installing the dog say that the lugs should be offset TOWARDS the notch.

What am I missing here?

Sorry to be so dense.

60ragtop · Posted: Thu Mar 05, 2015 6:23 pm Post subject:

You can't tell where the # 1 notch is in the above pic.
If it is a spare dist just match it up to what dist is in the car now as it will be going in there ?
_________________
Rick
Certified Mechanic by the State of Michigan in 1977
ASA certified in 1987
Certified Hunter Wheel Alignment Master Technician 1986

tasb · Posted: Thu Mar 05, 2015 10:10 pm Post subject:

Here's the way I do it. I rest the distributor on my chest with the shaft that the rotor sits on against my shop apron. I line the open notch that the rotor lines up with towards my head. In this position the shims and the drive dog go on and the narrow or short side of the drive dog offset faces my head. I set the pin in finger tight then placing the distributor on my vice I drive the pin the rest of the way home. This would work for the "205 M" assuming its either a 111 905 205 M or a 113 905 205 M. If its one of the other 205 M's that Bosch produced the instructions for installing the drive dog would probably be reversed.
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Hokie87 · Posted: Sat Mar 14, 2015 5:07 pm Post subject:

rcroane · Posted: Sat Mar 14, 2015 7:53 pm Post subject:

Is your rotor pointing to the #1 mark on the case? If so, I'm pretty sure you are 180 degrees off. I found @tasb's technique above to be the easiest way to get it right.

Hokie87 · Posted: Sun Mar 15, 2015 4:50 am Post subject:

Thanks. Yes, the rotor is pointing to the mark. I tried tasb's technique too and thought it was 180* off but wanted to check.

rcroane · Posted: Sun Mar 15, 2015 8:30 am Post subject:

Also use the picture posted by KTPhil. Use this to visulize how your distributor will drop down in the hole. The cogs on the drive dog will be parallel to the crank pulley with the smaller side of the dog pointing towards the pulley. You'll see how it goes by looking down in the hole. Remember, turn your crank to #1 firing position before removing the old distributor!


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