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Main Fuse #558843
09/02/19 04:41 PM
09/02/19 04:41 PM
Joined: Jul 2011
Posts: 458
I
IcePack Offline OP
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Joined: Jul 2011
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Interesting article in MOG magazine this month re main fuse corrosion & failure.
I did not know there was one as have never seen it, despite changing the battery fairly recently. In terms of servicing & preventative measures, what would my learned friends recommend to prevent/arrest any corrosion. My first thought is WD40, but I know long term it can actually attract moisture. Not sure of using ACF50 on an electrical component either.
Thanks


4/4 Ivory 4.1:1 axle, Jaguar XE R-Sport.
Re: Main Fuse [Re: IcePack] #558856
09/02/19 05:21 PM
09/02/19 05:21 PM
Joined: Dec 2009
Posts: 20,733
Devonshire
+8Rich Online content
Member of the Inner Circle
+8Rich  Online Content
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Joined: Dec 2009
Posts: 20,733
Devonshire
I use Dow Corning MS4 grease as I have some left over from a previous occupation but this stuff is half the price with the same electrical properties. It also has the side effect of making the fuses easier to pull and replace.

silicon grease

In a similar preventative vein if you have the new type electronic pcb behind your dash it's well worth giving it a good coating of this conformal coating to prevent an expensive happening when the water finds it's way in there. conformal coating

This prevented a disaster when the licquorice tubing washer pipes fell off soaking it all on my 4/4 Sport.


Regards Richard

1999 Indigo Blue +8
2009 4/4 Sport Green
1994 Connaught Green +8





Re: Main Fuse [Re: IcePack] #558861
09/02/19 05:38 PM
09/02/19 05:38 PM
Joined: Sep 2014
Posts: 817
East Sussex, ENGLAND
andymot Offline
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andymot  Offline
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Joined: Sep 2014
Posts: 817
East Sussex, ENGLAND
ACF50 is fine for electrics and is just what I'm going to use on the said fuse - after reading the Mog article.

I have used it on fuseboxes ( cars - not domestic!) and even PCBs on old Rover sat-nav units where water ingress is possible/likely.


2015 Morgan 4/4 (Wolf tuned engine, steering and suspension)
Mazda MX5+some preserved BL relics.

Re: Main Fuse [Re: IcePack] #558871
09/02/19 06:22 PM
09/02/19 06:22 PM
Joined: May 2014
Posts: 3,544
Essex
Burgundymog Offline
Talk Morgan Addict
Burgundymog  Offline
Talk Morgan Addict

Joined: May 2014
Posts: 3,544
Essex
Originally Posted By IcePack
Interesting article in MOG magazine this month re main fuse corrosion & failure.
I did not know there was one as have never seen it, despite changing the battery fairly recently. In terms of servicing & preventative measures, what would my learned friends recommend to prevent/arrest any corrosion. My first thought is WD40, but I know long term it can actually attract moisture. Not sure of using ACF50 on an electrical component either.
Thanks


You should speak to Cain who had a catastrophic failure of this nature on the Wolf Cafe Racer on an unlit stretch of the A14 at night.


Keith
2013 narrow bodied + 4 Ruby. Wolf performance Re-map suspension mods and K&N cone filter.
Re: Main Fuse [Re: IcePack] #558905
09/02/19 08:59 PM
09/02/19 08:59 PM
Joined: Sep 2011
Posts: 11,597
Mandello del Lario, Lake Como,...
Gambalunga Offline
Member of the Inner Circle
Gambalunga  Offline
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Joined: Sep 2011
Posts: 11,597
Mandello del Lario, Lake Como,...
Which fuse is this and where is it located?

Photo?


Peter

[Linked Image]
Re: Main Fuse [Re: Gambalunga] #558917
09/02/19 10:30 PM
09/02/19 10:30 PM
Joined: Feb 2016
Posts: 1,842
East Harling, Norfolk UK
Richard Wood Offline
Talk Morgan Enthusiast
Richard Wood  Offline
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Joined: Feb 2016
Posts: 1,842
East Harling, Norfolk UK
Originally Posted By Gambalunga
Which fuse is this and where is it located?

Photo?

On the latest +4 and Roadster (maybe 4/4) there are two approx 35mm2 red cables from battery positive terminal. One feeds stater motor directly and the other the common positive battery stud at front of car via an 80 amp maxi fuse in holder located close to battery. These two cables follow a similar path to the front, secured internally to wood frame underneath right hand door.

On mine the fuse is clearly visible when the battery access plate is removed.

Last edited by Richard Wood; 09/02/19 10:48 PM.

Richard

2018 Roadster - Red/Magnolia - "Morton"
1967 Land Rover series 2a SWB
1960 Velocette Venom
Re: Main Fuse [Re: IcePack] #558926
09/02/19 11:15 PM
09/02/19 11:15 PM
Joined: Jul 2011
Posts: 458
I
IcePack Offline OP
Learner Plates Off!
IcePack  Offline OP
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Joined: Jul 2011
Posts: 458
+8Rich thanks for those links. Andy thanks for info on acf50.
I still have to find my fuse it seems well hidden. I will be lifting the tool tray next week & will have a look then.


4/4 Ivory 4.1:1 axle, Jaguar XE R-Sport.
Re: Main Fuse [Re: IcePack] #558930
10/02/19 12:03 AM
10/02/19 12:03 AM
Joined: Sep 2011
Posts: 11,597
Mandello del Lario, Lake Como,...
Gambalunga Offline
Member of the Inner Circle
Gambalunga  Offline
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Joined: Sep 2011
Posts: 11,597
Mandello del Lario, Lake Como,...
Thanks. I too will check it out in due course.


Peter

[Linked Image]
Re: Main Fuse [Re: +8Rich] #558940
10/02/19 08:24 AM
10/02/19 08:24 AM
Joined: Sep 2014
Posts: 1,422
London
MOG 615 Offline
Has a lot to Say!
MOG 615  Offline
Has a lot to Say!

Joined: Sep 2014
Posts: 1,422
London
Originally Posted By +8Rich
I use Dow Corning MS4 grease as I have some left over from a previous occupation but this stuff is half the price with the same electrical properties. It also has the side effect of making the fuses easier to pull and replace.

silicon grease

In a similar preventative vein if you have the new type electronic pcb behind your dash it's well worth giving it a good coating of this conformal coating to prevent an expensive happening when the water finds it's way in there. conformal coating


Rich

Conformal coatings are a great idea providing that you are sure that the substrate is 100% clean. I used to work in the chemical cleaning industry and we sold far more chemicals to help people try to remove conformal coatings because they had trapped water or dirt behind them than we did cleaning fluid to clean the PCB in the first place. Because the coating is designed to stick , it is the very devil to remove entirely and most of the components ended up being used for spares only.

The other issue is that once applied any maintenance of the electronics is impossible, so dry joints etc became an issue.


Andy G
1999 +8 , Indigo Blue.
Ex-John McKecknie/Mike Duncan 1955 +4 racer.
Re: Main Fuse [Re: IcePack] #558969
10/02/19 10:11 AM
10/02/19 10:11 AM
Joined: May 2009
Posts: 176
Durham, UK
S
smudger1 Offline
L - Learner Plates On
smudger1  Offline
L - Learner Plates On
S

Joined: May 2009
Posts: 176
Durham, UK
Just a word of caution. WD40 has excellent insulating properties ( which is why people spray HT leads to stop electrical tracking in wet weather). If you get this on an electrical contact i.e. Fuse and Fuse Holder there is every chance you will eventually end up with a high resistance.

There is a copper rich grease available ( not coppaslip) which is specifically designs to preserve / prevent water ingress which is used in the marine environment but my old brain has ran out out of memory but I'm sure one of you can find it online.


1999 Morgan Plus 8. 3.9 ....
1961 Alvis TD21 Series1 3 Litre Auto....
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