LAND ROVER 24V FFR Lightweight 88"

S LATHERON (RIP) · #1 12-02-11, 19:26

Hello
I am in the process of aquiring one of the above. Having never owned an FFR vehicle I wondered about the charger Generator does it run all the time or is it/ can be disconnected. I am un likeley to ever fit radio equipment so I was wondering if this is/can be by passed as I assume the vehicle has an Alternator to charge vehicle batteries?
I have tried to contact the Light weight owners club with out success as My Email address is not accepted. Any one PM me with a land address so once I get vehicle bought I can register and pay any subs
Thanks in advance for the help I know is out there
Stephen

Richard Farrant · #2 12-02-11, 20:03

Quote:

Originally Posted by S LATHERON

Hello
I am in the process of aquiring one of the above. Having never owned an FFR vehicle I wondered about the charger Generator does it run all the time or is it/ can be disconnected. I am un likeley to ever fit radio equipment so I was wondering if this is/can be by passed as I assume the vehicle has an Alternator to charge vehicle batteries?

Hi Stephen,

The 90 amp 24 volt alternator is the only generator on the vehicle, it can charge vehicle batts and radio batts, or just vehicle.

regards, Richard

Lynn Eades · #3 12-02-11, 20:57

.......and without its scream, or whine, we might not hear it go past...

Richard Farrant · #4 12-02-11, 21:06

Quote:

Originally Posted by Lynn Eades

.......and without its scream, or whine, we might not hear it go past...

never noticed those generators making any unusual noises, no difference to a 12 volt Land Rover I would say...., and have had many years experience of them.

S LATHERON (RIP) · #5 12-02-11, 22:01

Thank you Richard
I have just spoken to the current owner of the vehicle and arranged to go and view it tomorrow. As its 40 years old I expect there will be some work required. I have spent most of today on line pricing major items so that when I actually view the vehicle I can work out what I am most likeley to need to do a rebuild. Once I own the truck I can get it home. Only then can I start in earnest making out a needs list, then a secondary Wish list
Regards Stephen

Lynn Eades · #6 12-02-11, 22:36

The fan on them is symetrical (like a siren fan) most alternators have an asymetrical fan ( for example Bosch alternators often have 3 larger blades on one side, balanced by four smaller ones on the other) because of this they "sing" Maybe you have spent too long at the range, using "Bilsom" in your ears. I'm sure other ex eme mechs know what i'm talking about.

Richard Farrant · #7 12-02-11, 22:49

Quote:

Originally Posted by Lynn Eades

The fan on them is symetrical (like a siren fan) most alternators have an asymetrical fan ( for example Bosch alternators often have 3 larger blades on one side, balanced by four smaller ones on the other) because of this they "sing" Maybe you have spent too long at the range, using "Bilsom" in your ears. I'm sure other ex eme mechs know what i'm talking about.

Lynn,

My hearing is not that bad, you originally described the generator as a "siren", would hardly say it is anything like that, the multiblade engine fan made more noise. Are you actually familiar with this particular CAV generator?

Did not spend time on the ranges either.

fv1620 · #8 13-02-11, 00:11

Nope I've never heard a Generator No.10 scream, siren or whine, nor even the 100A Generator No.9.

I think my hearing's ok as I can hear the whine from my Generator No.2, but that's a gearbox issue not the design of the fan.

FV1611A · #9 03-09-11, 23:46

I have had a few 90A 24v FFR Landrovers and I have to say they have always purred quieter than my current 2009 VW Scirocco company car.......

I suspect a belt or bearing issue if they squeal or whine ???

Robin Craig · #10 06-09-11, 09:36

why would you post on this forum about the land rover when you are in the UK.

While Richard and Clive hang out here a lot there are many other people who will help you and be interested if you posted on www.hmvf.co.uk which is crammed full of Brits.

R

fv1620 · #11 08-09-11, 11:50

I hope the revamp of this article may help those who are stuck trying to sort out problems in their 24v 90A system.

This is a major upgrade of the original article which now has 54 pages with 81 images. The entire project of research, writing, image manipulation and setting up the tests themselves is in the order of 400 hours work. So I hope it helps someone.

http://www.hmvf.co.uk/pdf/ALL%20CHAR...4%20ver3-2.pdf

malcolm erik bogaert · #12 08-09-11, 16:03

Clive I will download that as you never know when it will come in handy...next time I bump into HRH Im going to mention if there any chance of a knighthood for you on account of all the unpaid work you do on our behalf..you are a true gentleman best regards malcolm

fv1620 · #13 08-09-11, 17:30

Thank you Malcolm. I try to write things I wish that I could have read some years ago. Many of these articles have evolved after stints of trying to help people & trying to explain what's going on. Then realising there might be a better way of explaining it.

What I like about putting the articles on HMVF, it is like an EMER, bits can be added or removed in the light of experiences or uncovering fresh information. Unlike a magazine article that gets frozen in time once it is printed & indeed chucked out when someone realises they have too many mags piling up.

There are still mysteries & details I am pursuing, so maybe next year there will be a further version

Curiously I don't actually own a vehicle with the 90A system

malcolm erik bogaert · #14 08-09-11, 20:47

Lynn..all the ones I drove in service never made any noise although I did hear from my FOS that if they had been standing a long time you had to fill the item with oil...probably yours was empty of oil!cheers malcolm

ted angus · #15 08-09-11, 22:15

Quote:

Originally Posted by malcolm erik bogaert

Clive I will download that as you never know when it will come in handy...next time I bump into HRH Im going to mention if there any chance of a knighthood for you on account of all the unpaid work you do on our behalf..you are a true gentleman best regards malcolm

May I be allowed to second the proposal for SIR CLive !! another cracking piece of wordsmithing- thank you Clive,

Lynn WE had a 24v FFR in Germany thankfully without radios the only whine I recall was the tyres and from our Flt Lt when I was driving !!

TED

fv1620 · #16 08-09-11, 23:46

Thank you Ted you're making me blush. The really embarrassing thing is that there are about 20 errors in it mainly of a grammatical nature. So hopefully tomorrow the amended version will be posted to replace what is there which itself is a corrected version!

My problem is that I am quite dyslexic & when I read something I have written with errors, the brain software bypasses what my eyes see & superimposes what it thinks should be there.

The way to weed out the errors is to print out something & read it the next day or read out aloud what I see on the screen. That forces the brain to connect to the eyes rather than to my memory.

"This is the the sought of think I right & not everywon nose watt I meen to to saw"

It's not always quite as bad as that but you get the idea. It slows up any writing as even a simple post like this will have been corrected many times

fv1620 · #17 12-09-11, 21:50

In case people wonder what has changed yet again!

The version (V4.3.1) posted on 8/9/11 was a major upgrade in alternator construction and testing, there are 18 additional pages with 30 new images.

The version (V4.3.2) posted today 12/9/11 corrects about 20 dyslexic errors that defied my repeated checking until it was uploaded when they all became embarrassingly obvious. In the light of more data purchased a few days ago I have been able to expand the section the diodes types used in the generator. If you enjoy part numbers, CV codes, NSNs etc then this section is for you.

As this is a living document, rather like an EMER, sections can be amended & added to make it as comprehensive as possible. I am particularly keen to hear from anyone who can add any data or references to the generator diodes of their various kinds.

Richard Farrant · #18 20-09-11, 00:41

On behalf of Clive who currently has internet problems, here is the latest up date to his article;

"All Charged Up version 4.3.3

No dramatic changes. I don't expect people want to trawl through the whole thing again looking for changes. These are mainly:

Page 12 Use of Avo 12 described (cos I'm very excited as I bought another one at the weekend).

Page 9 Rectifier symbol added to help diode picture.

Pages 23 and on ... "Conundrum of diodes, etc". In the light of 3 more documents seen recently I have been able to augment some info and can clearly show that the Army on several occasions got confused between the various diode types used.

Page 26 Thanks to Phil B for pointing out some of the replacement diode types used.

Page 55 Photo of the elusive black generator"

fv1620 · #19 07-10-11, 12:22

Thank you for doing that Richard. I think I'm sorted now.

It has now been superseded by ver3.4 only changes are on pages 26/27 where there is some clarification about replacement diodes & further suggestions.