electric brakes on caravan

Submitted: Friday, Jun 20, 2008 at 16:16
ThreadID: 59027 Views:3814 Replies:8 FollowUps:11
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Hi. I'm new to caravanning and have been away in my van a couple of times but noticed my wheels in the van are hot when I stop. The electric brakes appear to be working fine and pulling up without problems. I repacked my bearings before the last trip and they seemed to be fine as well.
Could I be doing something wrong or would this be the norm.
The van is 18ft, weighs 1400kgs, single axle, towed by 3.2 ltr turbo Pajero diesel, tows wonderfully.
I've tested the brake settings prior to leaving and the van is just starting to pull up prior to the car pulling up, could I possibly have the sensitivity or adjustments set too high.
Any help would be appreciated.
regards

Mel
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Reply By: Saharaman (aka Geepeem) - Friday, Jun 20, 2008 at 17:29

Friday, Jun 20, 2008 at 17:29
HI Melvin,
Are you sure you released the handbrake before taking off?
I accidently left mine on once and wondered why the turbo diesel could hardly pull it up the first hill.
When I realised what it was the wheel hubs were quite hot by then,
Just a possibility,
Cheers,
GPM
AnswerID: 311256

Follow Up By: melvin - Monday, Jun 30, 2008 at 19:28

Monday, Jun 30, 2008 at 19:28
Hi GPM

Thanks for the follow up, yes i checked that first of all.
regards
mel
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FollowupID: 579111

Reply By: Gazal Champion - Friday, Jun 20, 2008 at 17:42

Friday, Jun 20, 2008 at 17:42
Hi Melvin,
Provided you have not left your hand brake on as the previous post has suggested then from your description it sounds as though you may have the setting a little high. What sort of brake controller is it and do you have the instructions for it.
I gather from your enquirie that you may have the instructions but I was just curious to find out for sure.

The reason I ask about the instructions is that I have a Tekonsha Prodijy fitted to my Cruiser and the instruction are kept in the car. I can email you a copy if you need them.
Regards,
Bruce.
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restless and lost on a track that I know. HL.

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AnswerID: 311263

Follow Up By: Gazal Champion - Friday, Jun 20, 2008 at 17:44

Friday, Jun 20, 2008 at 17:44
Should have added that if the van is pulling up first that more or less indicates the power setting may be a little high
Bruce.
At home and at ease on a track that I know not and
restless and lost on a track that I know. HL.

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Follow Up By: melvin - Monday, Jun 30, 2008 at 19:29

Monday, Jun 30, 2008 at 19:29
Hi Bruce

thanks, I'm starting to think that is the problem

Mel
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FollowupID: 579112

Reply By: RoyHarv - Friday, Jun 20, 2008 at 17:52

Friday, Jun 20, 2008 at 17:52
Hi Melvin
In my experience warm is OK but hot would indicate a problem unless you have been doing some recent or extended braking! A couple of things you could check:- 1. Wheels spin reasonably free when no brake applied. 2. Bearing retaining nut backed off ~ 1 castellation. 3. Is most heat from centre of drum or wheel, or near the brake drum outer. (Touch with a damp rag or use a few drops of water to gauge the heat by evaporation rate.) 4. Ideally the brake controller should be applying the van brakes in parallel to yours in the car. It does sound as though they are coming on a little early but I would have expected you would also feel like the van is doing more braking effort than the tug.
Hope this offers some help!
Cheers Roy
AnswerID: 311266

Follow Up By: melvin - Monday, Jun 30, 2008 at 19:30

Monday, Jun 30, 2008 at 19:30
Hi Roy

As per Bruce's advice I feel they may be adjusted incorectly as the van is pulling up first

Mel
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FollowupID: 579113

Reply By: Sand Man (SA) - Friday, Jun 20, 2008 at 17:55

Friday, Jun 20, 2008 at 17:55
Easy to check if it's the brakes.
Disconnect them and take a run along a flat section of road for a half hour, then check if the hubs are hot.

Perhaps there is too much grease in the repacked bearings, or they have been nipped up a bit tight?

Bill.
Bill


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AnswerID: 311268

Follow Up By: DIO - Friday, Jun 20, 2008 at 18:36

Friday, Jun 20, 2008 at 18:36
Unsound advice.....Just be careful if you decide to disconnect the brakes and then go out driving on the road. If (IF) you should be unfortunate to be involved in an accident you could (COULD) encounter problems with THE LAW and your Insurance company. Think about it. I'd suggest you take it to a brake specialist, pay some $$$$ and not have to worry about any other likely implications.
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FollowupID: 577271

Follow Up By: Sand Man (SA) - Saturday, Jun 21, 2008 at 11:35

Saturday, Jun 21, 2008 at 11:35
Yeah, Yeah, Bloody hell, I'm a bad boy:-))

Bill


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Reply By: Dunaruna - Friday, Jun 20, 2008 at 19:48

Friday, Jun 20, 2008 at 19:48
In regard to the handbrake -

Many people adjust them too tight. As your suspension drops it pulls on the cable, this shortens the pulling distance and can apply the brakes. At rest, adjust the handbrake cable to allow for suspension movement. 4 or 5 'clicks' should be about right.
AnswerID: 311289

Follow Up By: motor_head - Saturday, Jun 21, 2008 at 01:56

Saturday, Jun 21, 2008 at 01:56
Hi Dunaruna, i'm also new to trailer brakes, you say 4 or 5 clicks, maybe you can help me too, i had to adjust my trailer handbrake, to get the handbrake to work i only get 2 clicks on the handle, there is about 3 or 4 mm left on brake shoes, the electric braking works fine. i am thinking the shoes maybe a little too worn, what are yout thoughts??
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FollowupID: 577363

Follow Up By: Dunaruna - Saturday, Jun 21, 2008 at 09:49

Saturday, Jun 21, 2008 at 09:49
To correctly adjust the handbrake you first have to adjust the shoes. Adjust the star wheel until the wheel is locked, then back it off 4 or 5 turns. The wheel should turn with light interference (slight shoe rubbing). If need be, back it off another couple of turns. Lower the van before adjusting the handbrake cable so that the suspension is compressed. Loosen the cable until you have 4 clicks. Should hold just fine.

As the friction material on shoes wear down they become less and less capable of dispersing heat which mean they become less efficient. One of the major problems with electric brake shoes is that they crack, the cracking gets worse as they wear. The cracking is cause for replacement. If they are not cracked, 3 or 4 mm is not panic time, you still have a bit of life left in them.

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FollowupID: 577384

Follow Up By: melvin - Monday, Jun 30, 2008 at 19:32

Monday, Jun 30, 2008 at 19:32
Hi Dunaruna

I haven't tested the adjustment on the handbtrake but i will, thanks

regards

Mel
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FollowupID: 579114

Reply By: Member - Axle - Friday, Jun 20, 2008 at 20:47

Friday, Jun 20, 2008 at 20:47
Hi Melvin. Interesting topic!, i have a 18ft Windsor but its tandem axle!, the electric brakes are touchy to set up but when set up is correct, there isvery little heat at all ,So the extra braking capacity for the same weight makes this a interesting discussion.


Cheers Axle.
AnswerID: 311302

Follow Up By: melvin - Monday, Jun 30, 2008 at 19:34

Monday, Jun 30, 2008 at 19:34
Hi Axle

Mine aren't just warm but quite hot, not enough to worry me that the bearings are overheating but enough to be concerned.

Mel
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FollowupID: 579118

Reply By: Member - Bucky (VIC) - Saturday, Jun 21, 2008 at 07:00

Saturday, Jun 21, 2008 at 07:00
Melvin

When I had the brake controller first put on the Navara, I was the best at leaving black skid marks, all over the place.

Primarily caused by watching that DVD from Techonsha

As I have found out, I really only want to feel the trailer brakes ever so slightly, not hard.
They are only an aid to take pressure off your vehicles brakes, and to help keep everything straight when braking.
I am wondering weather you are trying to slow down your tow vehicle, with your caravan ?

I could be wrong, but I believe that if you have adjusted your trailer brakes properly, you should hardly feel them come on, while driving.

I use the manual slide on my controller to test the brakes, as I leave the house,, the old "tug test". ( ever so slightly )

My trailer weight would 1200 kgs.

This works for me !

Cheers
Bucky
ps hope this makes sence



AnswerID: 311356

Follow Up By: melvin - Monday, Jun 30, 2008 at 19:36

Monday, Jun 30, 2008 at 19:36
Hi Bucky

Thanks a lot, like the other advice I feel I have deffinately had them adjusted too high and I am sure I must have been trying to use the van to slow the car as well.

regards

Mel
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FollowupID: 579119

Reply By: melvin - Monday, Jun 30, 2008 at 19:41

Monday, Jun 30, 2008 at 19:41
To all of you that have offered opinions and advice, thankyou so much, I'm sorry I took a few days to answer, but apart from checking my emails quickly i haven't had chance to log back on to the site again.
as soon as i can I'm going to become a member of your great organisation, to help a pledge like myself as you all have, was a great thing to do.

My thanks to you all and to Explore Oz again

Regards

Melvin
AnswerID: 313121

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