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  #1249  
Old 03-04-2015, 09:46 PM
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Re: The Towing thread

Using heat seems to be gaining a following, however this is a tough arena to provide "rules" or formulas. Unfortunately, Tyre Tables are rarely available for the vast majority of tyres, and the 4 psi rule is problematic in some (many?) situations. 70 degrees has been mentioned as an optimal maximum, but that could be hard to maintain when the bitumen is melting!

For the highway I probably err on running tyres high, then watch closely for wear in the centre and monitor for lack of directional stability. Off road I drop pressure and speed commensurate with the terrain. Dare I say, very roughly in proportion to one another.

Cheers,
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  #1250  
Old 03-04-2015, 10:38 PM
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Re: The Towing thread

get yourself a tpms for the trailer and problem solved now you have no excuses for not watching what the temps are doing
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  #1251  
Old 03-04-2015, 11:25 PM
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Re: The Towing thread

Yes, however you need to research these well as the valve cap type can be problematic in themselves... plus they generally produce rubbish temperature data. Internal transducers are the way to go.

I'm looking for a three axle unit that will cope with these being split up between my caravan (1 axle) and boat trailer (2 axles).

Cheers,
Steve
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  #1252  
Old 03-05-2015, 04:58 AM
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Re: The Towing thread

Barboots my old man swears by his he travels inland aust several times a year, I thought he was just a pedantic old boy, but to be honest it taught me alot, you could actually see the difference pressures made in temps relevent to ride. Btw this was in a cruiser. I actually flick through mine on long trips just to observe the differing air temps make to the pressures.
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Old 03-05-2015, 02:02 PM
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The Towing thread

Steve, were you asking me the question? (Jason?)

If so, i can't say I get any porpoising, but with 200kg on the towbar I certainly know it's there....

The only handling difference I've noticed is crossing dips - like the ones between Broken Hill and Silverton, where the rear end goes down a fair way and you can really feel it. Some of the effect could be reduced with my driving technique

The other thing I'd like to investigate is a couple of instances of fronr end aquaplaning I experienced on the same trip out west. The Jeep still has the Michelins tyres on it, but it let go a couple of times around 90km/h when going through a couple of water patches. Even though the setup was level, I suspect there was a portion of weight transferred from the front wheels as a result of the 200+kg on the back.

So my next trip I'm going to hook up the WDH and see if the handling's any different. Whether I get to compare wet handling will be in the lap of the weather gods

My Vista RV is well under Jeep's recommended weight for a WDH, but 200kg on the towbar is a fair weight. The camper is the best handling of all the campers or caravans we've owned, primarily because of the brilliant suspension it has. Our previous car was a 120 Prado with Polyairs fitted. That alone kept everything level without a WDH.
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Old 03-05-2015, 07:34 PM
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Re: The Towing thread

Yeah sorry mate. My recollection was that your name was Jason, but from your reply I gather it isn't. Thanks for your detailed reply.

Cheers,
Steve
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Old 03-05-2015, 08:45 PM
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Re: The Towing thread

No worries Steve just call me Jarse or John
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Old 03-05-2015, 09:33 PM
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Re: The Towing thread

Had this tandem load of scrap steel on today gcm of 6690t, 3t of steel towball weight would have been in excess of 200kg towed like a gem got to love airbags uploadfromtaptalk1425609169722.jpg
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  #1257  
Old 03-05-2015, 10:15 PM
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Re: The Towing thread

Quote:
Originally Posted by nicjak View Post
get yourself a tpms for the trailer and problem solved now you have no excuses for not watching what the temps are doing
I have tpms on all wheels, car, trailer and spares. However, with my MY12 Laredo I can't see if the trailer wheels are picked nor what the temperature is. Perhaps I could if I got an after market unit that will read the Jeep tpms but at the moment it's easier to just put my hands on the wheel. I touch the trailer bearings as well. The tpms won't help there.
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  #1258  
Old 03-05-2015, 10:19 PM
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Re: The Towing thread

if you are travelling a laser type temp checker is very handy we use them to check truck wheel bearings and all sorts of workshop related temp issues.

Quote:
Originally Posted by BobT View Post
I have tpms on all wheels, car, trailer and spares. However, with my MY12 Laredo I can't see if the trailer wheels are picked nor what the temperature is. Perhaps I could if I got an after market unit that will read the Jeep tpms but at the moment it's easier to just put my hands on the wheel. I touch the trailer bearings as well. The tpms won't help there.
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Old 03-06-2015, 12:39 PM
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Re: The Towing thread

I have one of those infra red pointers to check my caravan hubs. Works well.
I also have the Sensatyre TPMS unit, which is good for upto 12 wheels. I use 6 of them as dual axle and 2 spares. That reads pressure as well as tyre temps.
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Old 03-16-2015, 08:54 AM
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Re: The Towing thread

Hi Everyone on the Towing Thread.

Currently have mopar Best bar on my 2012 Overland. Appears to have hairline cracks along bottom. My caravan is 2.9 tonne fully loaded complete (weigh bridge cert) and has been towed quite easily behind Jeep with WDH.
It will be viewed tomorrow at dealership in Brisbane.
Have travelled approximately 68 K.
Has anyone had similar issue or viewed similar.
Regards
Wayne
(Strategy)

I have followed up with Jeep and they have advised that it could be where they cut them out of the packaging- it is definitely a score type mark in the steel and looks like and feels like a crack. It is on both sides and turns from the bottom flat area towards the first bolt hole on each side.
They have advised that they have seen similar so I will keep an eye on it. What was noticeable was that 3 bolts securing towbar into chassis rail were slightly loose. These had been re-tightened and retorqued last year.
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