Tow Bar Weights

Submitted: Sunday, May 03, 2009 at 11:59
ThreadID: 68464 Views:2157 Replies:8 FollowUps:7
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Can anybody give me the method of measuring the tow bar weight using bathroom scales or a link to search.

Thank you

TD
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Reply By: Shaker - Sunday, May 03, 2009 at 12:12

Sunday, May 03, 2009 at 12:12
Put the scales under the jockey wheel?
AnswerID: 362926

Reply By: TTD - Sunday, May 03, 2009 at 13:07

Sunday, May 03, 2009 at 13:07
Tried that Shaker but they dont go high enough,thanks anyway
TD
AnswerID: 362934

Reply By: Member - Don M (NSW) - Sunday, May 03, 2009 at 13:33

Sunday, May 03, 2009 at 13:33
TD,

Maybe I'm wrong but I can't think of any way you are going to measure your tow ball weight using bathroom scales. Not sure what sort of van you have but I imagine it's tow ball mass is at least 100kg...mine is 305kg and no bathroom scales are going to measure even 100kg.

There are two ways of measuring TBM:

1. Go to a Hayman Reese outlet and they may measure it. Most have scales for the purpose, so I am led to believe, or

2. Put your van over a public weighbridge which is what I did. They are very helpful and usually won't charge if you don't want a certificate. To get TBM, measure

(a) weight with the wheels of the caravan with the wheels of the tow vehicle just off the weighbridge

(b) drop the jockey wheel down on the weighbridge and disengage from tow vehicle...can leave electrrics and chains connected.

TBM (tow ball mass) is (b) - (a)

Apologies if you already know all this.

AnswerID: 362935

Follow Up By: Member - Don M (NSW) - Sunday, May 03, 2009 at 13:37

Sunday, May 03, 2009 at 13:37
Sorry,

(a) should read

'...weight of the caravan with the wheels of the van on the weighbridge with the wheels of the tow vehicle just off so that the jockey wheel, when lowered, will be on the weighbridge also...'

Hope that hasn't confused the matter??
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FollowupID: 630565

Follow Up By: Horacehighroller - Wednesday, May 06, 2009 at 19:39

Wednesday, May 06, 2009 at 19:39
I'm curious Don,

What do you tow with a 305KG ball weight and what is it's ATM?

What is the maximum specified ball weight for your tow hitch - what brand?

Peter
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FollowupID: 631208

Follow Up By: Member - Don M (NSW) - Wednesday, May 06, 2009 at 23:25

Wednesday, May 06, 2009 at 23:25
Peter,

ATM is 2750kg
Capacity of Landcruiser LC200 is 3500kg
Tow ball 350kg
Van actually weighs 2640kg the way I lod it...(give or take)
Van is 2008 Jayco Sterling, 24-75.2 (24' body length)

Brochure saysTBM is 200kg...or thereabouts but that is unloaded and I doubt their figures frankly. I have tried various ways of balancing the van and the best I get is 305kg TBM

Hope that answers your question
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FollowupID: 631241

Reply By: Member - Lewis K (QLD) - Sunday, May 03, 2009 at 13:47

Sunday, May 03, 2009 at 13:47
If you place a board across a brick and the set of scales, place the jockey wheel half way across the board, make sure the van is level and read the scale and multiply by 2. So if you scale reads 75kg then your ball weight is 150kg. Not super accurate but it will get you very close without leaving the driveway.
AnswerID: 362937

Reply By: Member - Ed. C. (QLD) - Sunday, May 03, 2009 at 13:56

Sunday, May 03, 2009 at 13:56
Here ya go....

site link

PS Google is your friend;-))


Confucius say.....
"He who lie underneath automobile with tool in hand,
....Not necessarily mechanic!!"

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AnswerID: 362939

Follow Up By: Member - Don M (NSW) - Sunday, May 03, 2009 at 14:13

Sunday, May 03, 2009 at 14:13
Well done...., shows how much I know mind you, in my case, it would be difficult to find somewhere flat enough to do it.... I suppose I could always do it in the carp[ark at the local shopping centre...or pu..?? The latter sounds better...

Just checked, my bathroom scales go up to 120kg so, on the 3x method I could do it...just...!!!
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FollowupID: 630574

Follow Up By: Member - Ed. C. (QLD) - Sunday, May 03, 2009 at 16:09

Sunday, May 03, 2009 at 16:09
Don,
To increase weighing capacity of a given set of scales, you simply increase the ratio.. e.g., 2:1, 3:1, 4:1, etc...

If set up correctly, this method is every bit as accurate (or inaccurate) as the scales you use.. you just need to pay attention to the distance(s) between the load-bearing points, and calculate accordingly..

Regards, Ed C

Confucius say.....
"He who lie underneath automobile with tool in hand,
....Not necessarily mechanic!!"

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Follow Up By: Nomadic Navara - Sunday, May 03, 2009 at 21:00

Sunday, May 03, 2009 at 21:00
A lot of weigh bridges only weigh to the nearest 20 kg. If your local bridge is one of these then the bathroom scales will possibly be more accurate.

PeterD
PeterD
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Reply By: TTD - Sunday, May 03, 2009 at 14:09

Sunday, May 03, 2009 at 14:09
Thanks Gentlemen
I had read that you could use the scales and a board but did not know how to go about it

Thanks,
TD
AnswerID: 362941

Follow Up By: Member - Graham H (QLD) - Sunday, May 03, 2009 at 14:25

Sunday, May 03, 2009 at 14:25
If you only want the ball weight go to the weighbridge drive on With all of van on it but none of car.
DISCONNECT ANY BARS etc weigh it THATS the GTM Put the jockey wheel in and take the weight prferably with the van disconnected from the car. Chains are ok just lift it off the ball.

That is the ATM write it down and deduct the previous weight and You have an accurate ball weight.




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FollowupID: 630576

Reply By: Richard Kovac - Sunday, May 03, 2009 at 14:49

Sunday, May 03, 2009 at 14:49
TD

I've got one of these can be used as a jack and measuring tool
Multi Weigh

Image Could Not Be Found


Cheers

Richard
AnswerID: 362950

Reply By: Darbro74 - Tuesday, May 05, 2009 at 15:44

Tuesday, May 05, 2009 at 15:44
Hi TTD,

I went through the same issue a few months back when trying to determine the tow ball weight of my van. I had numerous ways and means to get the number - tried about 3 different methods...all different answers.

Eventually took it to a Hayman Reece outlet, had it weight and fitted wtih a HR hitch at the same time.

Trust me, take it to a pro.....otherwise you will only be guessing..
As it turns out, my weight is about 3 times that from the "alternative" methods gave me....

Its worth it..

Good Luck.

Darbro
AnswerID: 363354

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