Speedo Bounce

An alchemy of sparks, copper wire and earth

Moderators: User administrators, Moderators

Re: Speedo Bounce

Postby dumbo » 09 Jul 2018, 21:28

my gemo cable was oil and a new wheel bearing cap cover fitted its always been like that but holding the cable sorts it? but after 30 onwards it stops and the speeds are good to :ok
1986 DG WBX AUTOHOMES kamper
User avatar
dumbo
 
Posts: 410
Joined: 24 Jan 2012, 20:21
Location: burwell cambridgeshire
80-90 Mem No: 10625

Re: Speedo Bounce

Postby Oldiebut goodie » 09 Jul 2018, 22:59

I used a Gemo replacement a couple of years ago and have had no issues with it whatsoever. Luck of the draw maybe?
1Y 1.9d 1987 Hi-top Caravelle
508d Merc ex-bus
User avatar
Oldiebut goodie
 
Posts: 5507
Joined: 18 Apr 2008, 01:19
Location: Eastern Angle
80-90 Mem No: 11135

Re: Speedo Bounce

Postby itchyfeet » 10 Jul 2018, 06:07

Oldiebut goodie wrote:I used a Gemo replacement a couple of years ago and have had no issues with it whatsoever. Luck of the draw maybe?

Interesting, did you oil it first?

937carrera wrote:The problem with oiling as a solution, apart from getting the stuff in is it depends what the liner is made of and will it swell in some way, defeating the object ?


just wondering if oil is the cause not the solution?
1988 DG WBX LPG Tin Top
1989 DJ digijet WBX Holdsworth Villa 3 Pop Top
itchylinks
User avatar
itchyfeet
 
Posts: 9823
Joined: 23 Jul 2007, 17:24
Location: South Hampshire
80-90 Mem No: 12733

Re: Speedo Bounce

Postby 300CE » 10 Jul 2018, 06:24

Paul, have you tried driving about with the binnacle off and making slight adjustments to the cable as it goes in the back of the speedo to see if this makes any difference? You can then see if there is a point where the bouncing stops and try to hold the connection there.
1986 VW Transporter Bitsa Conversion, 1.9 DG Watercooled, Weber Carb, 5 Speed Dogleg
User avatar
300CE
 
Posts: 1725
Joined: 16 Aug 2012, 13:05
Location: Sidcup, Kent
80-90 Mem No: 12017

Re: Speedo Bounce

Postby R0B » 10 Jul 2018, 06:41

My gemo was fine for a few months,but started bouncing below 30mph a few weeks ago. :-(
2.1 LPG/Petrol Auto Caravelle
User avatar
R0B
Moderator
 
Posts: 15539
Joined: 07 Oct 2005, 17:33
Location: Cheshire
80-90 Mem No: 864

Re: Speedo Bounce

Postby itchyfeet » 10 Jul 2018, 06:41

300CE wrote:Paul, have you tried driving about with the binnacle off and making slight adjustments to the cable as it goes in the back of the speedo to see if this makes any difference? You can then see if there is a point where the bouncing stops and try to hold the connection there.


yep spent 400 miles doing that on the trip to France, had the binicle of and kept turning and adjusting, also kept stopping and taking grill off and pushing it in an out a bit to see if it was the path behind dash and it did make a difference but never cured it.
Thats when I got the idea it could be the long supporting tube and I cut it down then removed it altogether, better at speed but still bounced heavily at lower speeds.

When the bounce is too high the speedo starts chirping and thats a concern that it will long term kill the speedo.

I feel holding the cable is not the solution becuse it's alsmost impossible to get in behind the speedo and find something thats solid to clamp it to, also pulling on the cable means that you are probabbly pulling on the speedo.

I did montion that how far the outer is pushed into the hub also made a difference in my drill test but I never road tested it
1988 DG WBX LPG Tin Top
1989 DJ digijet WBX Holdsworth Villa 3 Pop Top
itchylinks
User avatar
itchyfeet
 
Posts: 9823
Joined: 23 Jul 2007, 17:24
Location: South Hampshire
80-90 Mem No: 12733

Re: Speedo Bounce

Postby itchyfeet » 10 Jul 2018, 06:43

R0B wrote:My gemo was fine for a few months,but started bouncing below 30mph a few weeks ago. :-(


yes same for me they were OK when fitted but no longer are, did you oil yours before fitting?


Rob do you feel like trying a test?
Get under and pull the outer from the hub with the inner in place, good hard tug ( snigger) this makes the inner sit down into the connector at the top.
1988 DG WBX LPG Tin Top
1989 DJ digijet WBX Holdsworth Villa 3 Pop Top
itchylinks
User avatar
itchyfeet
 
Posts: 9823
Joined: 23 Jul 2007, 17:24
Location: South Hampshire
80-90 Mem No: 12733

Re: Speedo Bounce

Postby R0B » 10 Jul 2018, 06:52

No i didnt oil before fitting.Will try tugging it later.
2.1 LPG/Petrol Auto Caravelle
User avatar
R0B
Moderator
 
Posts: 15539
Joined: 07 Oct 2005, 17:33
Location: Cheshire
80-90 Mem No: 864

Re: Speedo Bounce

Postby Sir Brixalot » 10 Jul 2018, 06:57

:D
R0B wrote:No i didnt oil before fitting.Will try tugging it later.
1989 Autosleeper Auto 1-9 DG with LPG conversion
Sir Brixalot
 
Posts: 3505
Joined: 15 Oct 2010, 21:55
Location: Brixton Town
80-90 Mem No: 8927

Re: Speedo Bounce

Postby itchyfeet » 10 Jul 2018, 07:05

R0B wrote:No i didnt oil before fitting.Will try tugging it later.



Great so thats the oil damaging the inside theory out.

I'm thinking they should be oiled as they make tools for the job and by not oiling the inside gets abraided causing permanent damage, just a theory at the moment.
1988 DG WBX LPG Tin Top
1989 DJ digijet WBX Holdsworth Villa 3 Pop Top
itchylinks
User avatar
itchyfeet
 
Posts: 9823
Joined: 23 Jul 2007, 17:24
Location: South Hampshire
80-90 Mem No: 12733

Re: Speedo Bounce

Postby R0B » 10 Jul 2018, 07:13

For the record i fitted a new grease cap when i replaced the cable, thinking the cap might be the cause of the bounce with the old cable.
2.1 LPG/Petrol Auto Caravelle
User avatar
R0B
Moderator
 
Posts: 15539
Joined: 07 Oct 2005, 17:33
Location: Cheshire
80-90 Mem No: 864

Re: Speedo Bounce

Postby CJH » 10 Jul 2018, 07:16

I fitted a Gemo cable almost 5000 miles ago, and it's still working perfectly - no bounce at any speed. I *DID* oil it before fitting.
"I'm a man of means, by no means....King of the Road!"

1983 Viking Xplorer, 2.1DJ
User avatar
CJH
 
Posts: 2691
Joined: 15 Jul 2013, 06:51
Location: Nottingham
80-90 Mem No: 12576

Re: Speedo Bounce

Postby itchyfeet » 10 Jul 2018, 07:27

CJH wrote:I fitted a Gemo cable almost 5000 miles ago, and it's still working perfectly - no bounce at any speed. I *DID* oil it before fitting.


Thanks for the vote Chris, how did you oil it?
I dripped a bit in but it seems thats not enough.
1988 DG WBX LPG Tin Top
1989 DJ digijet WBX Holdsworth Villa 3 Pop Top
itchylinks
User avatar
itchyfeet
 
Posts: 9823
Joined: 23 Jul 2007, 17:24
Location: South Hampshire
80-90 Mem No: 12733

Re: Speedo Bounce

Postby CJH » 10 Jul 2018, 07:35

I gripped it in the jaws of my workbench, say 75cm above the ground, and I dribbled a bit of engine oil in several times over the course of an hour or so. Did both ends. I didn't use anything as a funnel, so I don't think it will have taken very much oil. Maybe I was lucky and have ended up with the inner pulled short.
"I'm a man of means, by no means....King of the Road!"

1983 Viking Xplorer, 2.1DJ
User avatar
CJH
 
Posts: 2691
Joined: 15 Jul 2013, 06:51
Location: Nottingham
80-90 Mem No: 12576

Re: Speedo Bounce

Postby itchyfeet » 10 Jul 2018, 07:49

I'm still leaning towards lack of oil as the cause because of the two I fitted at a similar time one was oiled better than the other and has been better and lasted longer before bouncing.
1988 DG WBX LPG Tin Top
1989 DJ digijet WBX Holdsworth Villa 3 Pop Top
itchylinks
User avatar
itchyfeet
 
Posts: 9823
Joined: 23 Jul 2007, 17:24
Location: South Hampshire
80-90 Mem No: 12733

PreviousNext

Return to Electrical & Instrumentation

Who is online

Users browsing this forum: bigherb, Cecil and 11 guests