73T clock stopped. Solution?

For classic Porsche 911 content

Moderators: hot66, impmad2000, Barry, Viv_Surby, Derek, Mike Usiskin

Post Reply
911hillclimber
Nurse, I think I need some assistance
Posts: 17402
Joined: Mon Mar 10, 2008 6:26 pm
Location: West Midlands

73T clock stopped. Solution?

Post by 911hillclimber »

Irritation #4 on my 73T.
The original clock, 2/73 911 641 701 00 VDO 0004 has never been good, starts, slows down and recently stopped.

It did advance 4 mins the last drive though after being dormant for ages.

Being bored, thought i would have a look at things. There is 12 volts to the clock, and the ground wire is to earth.
Clock out of the car on the bench, 12 volts on, grounded to test battery, nothing, no whirring, no hands movement.

Presume it is done for.
Tried half-hearted to remove the bezel and failed, really tight and dust proof.

Removed the 2 small nuts on the back and the white cover will not come free, but looks like it should?

So:
Any tips to get it into life?
Any tips to send it away to the UK for fixing? (Reep??) If so about how much?
Leave it in the dash as a piece of hole filling decoration.

Favoring the last option.
73T 911 Coupe, road/hillclimber 3.2L
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9
Lightweight_911
Nurse, I think I need some assistance
Posts: 16053
Joined: Wed Nov 12, 2003 10:48 pm
Location: Worcs/WMids border

Re: 73T clock stopped. Solution?

Post by Lightweight_911 »

911hillclimber wrote: Tue Aug 02, 2022 12:58 pm
Leave it in the dash as a piece of hole filling decoration.

Favoring the last option.
That's what I'd do.

I can't really remember looking at the clock in any early 911 I've owned (or any other 'old' car I've owned come to that) - can't understand why Porsche still bothered fitting them in the '70's ...

.
Andy

“Adding power makes you faster on the straights;
- subtracting weight makes you faster everywhere”
Gary71
Nurse, I think I need some assistance
Posts: 9788
Joined: Wed Mar 31, 2004 1:27 pm
Location: Cheshire
Contact:

Re: 73T clock stopped. Solution?

Post by Gary71 »

Fit a vent.
Absolute life saver :)
User avatar
jb
DDK 1st, 2nd and 3rd for me!
Posts: 2202
Joined: Thu Jul 13, 2006 10:34 pm
Location: London

Re: 73T clock stopped. Solution?

Post by jb »

Your solution is admirable in the hot weather but should you wish to fix it then john's thread is probably a good start if only to decide that it is too difficult.
viewtopic.php?p=237839&hilit=clock#p237839
#1370
911hillclimber
Nurse, I think I need some assistance
Posts: 17402
Joined: Mon Mar 10, 2008 6:26 pm
Location: West Midlands

Re: 73T clock stopped. Solution?

Post by 911hillclimber »

Thanks JB, saw a similar video today but on a classic BMW, same clock (in general).
TBH can't be too bothered to fix it unless it was something easy, but some capacitors leak and loose their spec and the clock fails.

Will leave it alone as decoration and to remind me this is an old car with a grumpy old man trying to drive it.

It's just that it is there, right in my face, and not working, but after 34 years guess I can live with it.

Suffering from having nothing significant or hands-on to do!
Finished with old motorcycles now and even covered my new nuts-n-bolts over due to dust gathering on them, first time I've needed to do that in my life.

Gary, always drive with the window down a bit/lot so ventilation all good!
73T 911 Coupe, road/hillclimber 3.2L
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9
impmad2000
I need to get out more!
Posts: 3248
Joined: Fri Nov 14, 2003 8:31 am
Location: Leicester, a convenient mid point !
Contact:

Re: 73T clock stopped. Solution?

Post by impmad2000 »

I removed the guts from my clock and fitted a quartz replacement movement like a kitchen clock. I wired the 12v feed via a high value resistor ( 10M ohms perhaps) and made no attempt to drop the voltage to 1.5V. I made the 911 hands fit and it just works and has done for years.
Tim Bennett
RHD Targa 2.2T EFI, Triumph ITB's, EDIS and Megasquirt.
Audi Q3 for carrying big kite stuff
"Old enough to know what's right and young enough not to choose it"
#1153
911hillclimber
Nurse, I think I need some assistance
Posts: 17402
Joined: Mon Mar 10, 2008 6:26 pm
Location: West Midlands

Re: 73T clock stopped. Solution?

Post by 911hillclimber »

Good idea Tim, thank you, but I'll just leave it in there.
It is of little use as i isolate the car when not in use.
73T 911 Coupe, road/hillclimber 3.2L
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9
Nine One One
DDK rules my life!
Posts: 1268
Joined: Fri Mar 01, 2013 11:45 am
Location: Kernow - good old Cornwall

Re: 73T clock stopped. Solution?

Post by Nine One One »

Or failing that, lift your wrist up, and look at your watch?
911hillclimber
Nurse, I think I need some assistance
Posts: 17402
Joined: Mon Mar 10, 2008 6:26 pm
Location: West Midlands

Re: 73T clock stopped. Solution?

Post by 911hillclimber »

Very rarely wear one, never have.
Had some hard core safety stuff preached into me when an apprentice, lots of rotating machinery etc.
Don't have a wedding ring either...
73T 911 Coupe, road/hillclimber 3.2L
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9
User avatar
MikeB
Put a fork in me, I'm done!
Posts: 1814
Joined: Thu Aug 07, 2008 11:13 pm
Location: N. Ireland

Re: 73T clock stopped. Solution?

Post by MikeB »

I have had two clocks that had stopped working, in both occasions I got the back off, pretty sure that involves getting the bezel off, and I went to the little set of points that resets the spring, and gave the contact faces a clean with some emery paper and Hey Presto they worked ;)
Cheers

Mike

RS Rep 3.0 on Webers
Fiesta ST Lanes Rally car
'71 Lotus Elan Sprint (finally finished !!!)
Dougieboy1
I luv DDK!
Posts: 846
Joined: Mon Jan 04, 2016 7:27 pm
Location: Definitely round here somewhere

Re: 73T clock stopped. Solution?

Post by Dougieboy1 »

is it a quartz or pre-quartz.

My 72 is the pre quartz type and didnt work. After a bit of research, i discovered that the pre-quartz clocks, inside the workings in the back of the clock, have an electrical connection that behaves like a fuse and requires low temperature soldering to be repaired. Mine had broken so no power getting to the clock although power to the wire as with yours. I resoldered the connection and it worked for about 2 mins.

Am neither a clock person or patient, so i gave up and it is permanently 5.30. But as they say, at least it is correct twice a day.....
1972 911S
1944 VW Schwimmwagen (originally a Porsche typ128, eventually VW166)
A bunch of other crap (according to my wife)
911hillclimber
Nurse, I think I need some assistance
Posts: 17402
Joined: Mon Mar 10, 2008 6:26 pm
Location: West Midlands

Re: 73T clock stopped. Solution?

Post by 911hillclimber »

I got fancy, and have set the hands to 9-11, eleven past nine.
It will stay this way, the rest of the car is leaning to the state of the clock!
73T 911 Coupe, road/hillclimber 3.2L
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9
Post Reply