Warning... brakes on tow car

johnroots replied on 16/07/2020 11:48

Posted on 16/07/2020 11:48

Thought I would share this experience in the interest of safety.

It may be that I am the only one who has experiened it, and if so that is good news as my experience could have been very dangerous.

I had an A frame fitted to a Subaru Justy, by a well known and reputable company. Cost about £1200, so not a cheap affair.

No issues whatever with actually towing, I should add that I am experienced and have held a class one hgv for close to 40 years.

The issue arose when the car was being driven solo.

The braking mechanism is a cable from the A frame, going through the bulkhead and connecting to the brake pedal via ferrule and clip.

The length of the ferrule reduces the amount of pedal travel, which is fine unless you have to jump on the brakes as I did when touring the Yorkshire Moors. I ran out of travel and quickly pumped the pedal again and was able to pull up with very little to spare.

I knew immediately what the cause was, so now when not being towed the pedal connection is removed and MORE IMPORTANTLY tied to the side, away from the pedal travel area via a short bungee.  I say this because in checking out the issue I also found the hanging cable and ferrule can still impede the vbrake pedal travel.  

Whittakerr replied on 16/07/2020 12:24

Posted on 16/07/2020 12:24

Sound to me as though its either not been fitted correctly or is not fit for purpose. It it bake and insist a safe system is fitted.

 

johnroots replied on 16/07/2020 12:49

Posted on 16/07/2020 12:24 by Whittakerr

Sound to me as though its either not been fitted correctly or is not fit for purpose. It it bake and insist a safe system is fitted.

 

Posted on 16/07/2020 12:49

When I contacted the company after the incident, they said it was not a custom fit. Just like a 'one size fits all'.

Hence the reason for posting. As I said it may well be that this particular car suffers this issue but sharing it wont hurt. Even if it makes people have a second look at their own installation.

Lutz replied on 16/07/2020 13:23

Posted on 16/07/2020 13:23

Just a question on the side:

If the towed vehicle's brakes are applied purely mechanically without the servo system operating, how do they achieve adequate braking efficiency?

EmilysDad replied on 16/07/2020 14:47

Posted on 16/07/2020 13:23 by Lutz

Just a question on the side:

If the towed vehicle's brakes are applied purely mechanically without the servo system operating, how do they achieve adequate braking efficiency?

Posted on 16/07/2020 14:47

Agreed. Stopping a servo braked car while the engine isn't running is bl**dy hard work

JVB66 replied on 16/07/2020 15:41

Posted on 16/07/2020 13:23 by Lutz

Just a question on the side:

If the towed vehicle's brakes are applied purely mechanically without the servo system operating, how do they achieve adequate braking efficiency?

Posted on 16/07/2020 15:41

Another point when considering an a frame method of having a car against the much better method of it being on a trailer with proper mechanical braking system, the brakes on the towing vehicle must under some stress with about a ton or more not giving much braking assistants on the tow hooksurprised

Some friends of ours tow a car with an Aframe  and has had the car detach from the M/C twice now on heavy braking, (he is nearly the same as us with annual site visits) except, as us this yearsurprised

johnroots replied on 17/07/2020 10:33

Posted on 17/07/2020 10:33

A few replies and comments and im very glad to see nobody so far has had the same issue.

On the comments so far.

No not many Justys left on the road. A shame really as its a cracking little motor. Kerbweight 885kg, MPG average 48.9 (real useage not from some book)  With the back seat squabs pulled forward the dog has more level flat room that we do!  If they still made them I would buy a new one without any hesitation

Re servo on brakes. When braking you have the whole weight of the car pushing forward so the brakes work just fine, and with so little weight to stop, not having a servo isnt a big deal.

Re becoming detached....  The same system and chance as towing a caravan or trailer.

 

Lutz replied on 17/07/2020 12:09

Posted on 17/07/2020 12:09

As the car plus A-frame is considered to be a trailer it must logically comply with braking requirements that apply to a trailer. How is the 0.5g minimum deceleration level that the law specifies for trailers checked and confirmed?

JVB66 replied on 17/07/2020 20:44

Posted on 17/07/2020 10:33 by johnroots

A few replies and comments and im very glad to see nobody so far has had the same issue.

On the comments so far.

No not many Justys left on the road. A shame really as its a cracking little motor. Kerbweight 885kg, MPG average 48.9 (real useage not from some book)  With the back seat squabs pulled forward the dog has more level flat room that we do!  If they still made them I would buy a new one without any hesitation

Re servo on brakes. When braking you have the whole weight of the car pushing forward so the brakes work just fine, and with so little weight to stop, not having a servo isnt a big deal.

Re becoming detached....  The same system and chance as towing a caravan or trailer.

 

Posted on 17/07/2020 20:44

The breaking system is not the same as a caravan ,it would be if car was on a trailer

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