[ROVERNET - UK] Windscreen Wiper Delay - How Long?

Brian Humphreys brian_humphreys at btconnect.com
Sat Aug 18 23:20:52 BST 2007


OK bit more info.

I taped up the sponge end of the delay unit and proved that it wasn't the
one way rubber valve as the plunger still moved back out with my thumb on
the vacuum pipe connection.

The diaphragm looked fine held up to the light looking for small tears.

So I squeezed the unit together really hard and tried again with my thumb on
the vacuum connection. This time it held. It seems that the spring clips
holding the unit together just weren't strong enough or had weakened over
time. This was letting air through from one side of the diaphragm to the
other. I put some packing under the clips, put it together and now it seems
good. Attaching it to the car and I now have a delay of 5 seconds (well it
is getting better and I know the rest is not due to the delay unit itself).

Now to track down the steering column end for perhaps a split in the vacuum
pipe.

Hope this might help others.

Brian. 

-----Original Message-----
From: rovernet-bounces at lyris.ccdata.com
[mailto:rovernet-bounces at lyris.ccdata.com] On Behalf Of Brian Humphreys
Sent: 18 August 2007 17:28
To: rovernet at lyris.ccdata.com
Subject: RE: [ROVERNET - UK] Windscreen Wiper Delay - How Long?

Thanks, I knew it should be a reasonable value, now I know what I'm aiming
for.

I've experimented with different amounts of sponge and optimally (when the
air is being fully expelled rather than compressed because there is too much
sponge to allow the air to leave) I can eek an extra 1/2 second (big deal).
I also found that if I put insulation tape all the way round the unit before
putting on the spring clips I can get another second (wow). So now I'm up to
2.5 seconds on max.

Pressing in the plunger and covering the vacuum pipe inlet with my thumb
does not hold the plunger in - which I believe it should do.

I guess that the only thing left is the one way valve disc underneath the
sponge.

Does anyone have any good ideas on a diy repair disc?

Brian.

-----Original Message-----
From: rovernet-bounces at lyris.ccdata.com
[mailto:rovernet-bounces at lyris.ccdata.com] On Behalf Of Netspace
Sent: 17 August 2007 23:13
To: brian.jane at eggconnect.net; rovernet at lyris.ccdata.com
Subject: Re: [ROVERNET - UK] Windscreen Wiper Delay - How Long?

More like 20 sec on max.

PVS

----- Original Message -----
From: "Brian Humphreys" <brian_humphreys at btconnect.com>
To: <rovernet at lyris.ccdata.com>
Sent: Saturday, August 18, 2007 7:40 AM
Subject: [ROVERNET - UK] Windscreen Wiper Delay - How Long?


> All,
>
> I recently refurbished my wiper delay by replacing the piece of sponge 
> as it had been all but useless for several years. I currently have a 
> delay of about 1 second between wipes with the steering column white 
> dial set to maximum delay.
>
> I would like to know if this is the normal delay (it's been so long 
> since it worked properly I've forgotten) or if perhaps:
> 1. I didn't use enough sponge
> 2. There is a leak somewhere in the vacuum pipe.
>
> What sort of delay are others getting?
>
> Many thanks,
> Brian.
>
>
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> 1:46 PM
> 

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