2.5 DT Over Heating While Towing...Info...

redhand said:

MAM = Maximum admissible Mass and is the combined, maximum weight of a fully loaded vehicle and the trailer and the trailers load.

A 90/110 Discovery & RR can tow a trailer with MAM of 3.5tonnes on overrun brakes and 4 tonnes if the trailer is fitted with close coupled brakes (Hydraulic or Air brakes)

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zzr1200 said:

Now that sounds right, at long last.

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Unfortunately I think there are still concerns in redhand's note. If what he says is 100% correct, then the maximum trailers we can tow with our LR's and RR's is (3500kg - vehicle weight) which when you consider that the RR clocks in at 2000kgs or so, gives a maximum trailer weight of 1750kgs.

So if that is true, then we can still not legally tow a 3500kg trailer with a LR or a RR and we know that not to be the case......... or do we?

It probably also means that no-one can tow a mini-digger on the road unless they own a 7.5t lorry, or recover a RR on a trailer using another RR as the tow-vehicle. Does all that sound right ?

bwarb, a Land/Range Rover can legally tow a trailer fitted with over run brakes that weighs up to 3500 KG (ie: weight of the trailer and load = 3500 KG) then added to this is the weigh of the tow vehicle (in my case my 2.5 DT kerb weight is 2115 KG approx).

The GTW or MAM is made up of the total weight of the trailer plus the weight of the tow vehicle. ie: 3500KG (trailer + load) + 2115 KG (tow vehicle)= 5615 KG (GTW or MAM).

GTW: Gross Train Weight > Trailer + Load + Tow Vehicle = GTW
MAM: Maximum admissible Mass > GTW (as above)

bwarb said:

Unfortunately I think there are still concerns in redhand's note. If what he says is 100% correct, then the maximum trailers we can tow with our LR's and RR's is (3500kg - vehicle weight) which when you consider that the RR clocks in at 2000kgs or so, gives a maximum trailer weight of 1750kgs.

So if that is true, then we can still not legally tow a 3500kg trailer with a LR or a RR and we know that not to be the case......... or do we?

It probably also means that no-one can tow a mini-digger on the road unless they own a 7.5t lorry, or recover a RR on a trailer using another RR as the tow-vehicle. Does all that sound right ?

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GTW OR MAM on a disco or rangie or 90/10 is 3500 + what ever the weight of the vehicle is. In the case of my 90 The unladen weight is 1561kg & the max poayload is 839Kg which gives a GVW of 2400Kg Plus a trailer with a MAM of 3500Kg add these 2 figures together and it give you a Combined MAM or GTW of 5900Kg

According to Haynes Manual a disco 200tdi has Max GVW of 2720Kg + 3500kg towing limit = GTW of 6220kg

zzr1200 said:

bwarb, a Land/Range Rover can legally tow a trailer fitted with over run brakes that weighs up to 3500 KG (ie: weight of the trailer and load = 3500 KG) then added to this is the weigh of the tow vehicle (in my case my 2.5 DT kerb weight is 2115 KG approx).

The GTW or MAM is made up of the total weight of the trailer plus the weight of the tow vehicle. ie: 3500KG (trailer +load) + 2115 KG (tow vehicle)= 5615 KG (GTW or MAM)

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Kerb weight is empty vehicle full tank of fuel and a driver. the GVW is the unladenweight plus max payload. So you can load the vehicle up and tow 3500Kg. on a 200tdi 3 door disco kerbweight is 2088KG but GVW is 2720Kg so it's payload is 632KG not including the driver. (unless he's a real fat bastid)

Blimey... this is like pulling teeth!

MAM = Maximum Admissable Mass as Redhand says.

There's a MAM for the vehicle, there's a MAM for the trailer, there's a MAM for the combination of trailer and vehicle.

The MAM for the vehicle is split into axle MAMs - all this info will be listed on the VIN plate of a Land Rover.

1st figure = MAM for the vehicle, 2nd figure is MAM for vehicle and MAM for a trailed load combined. 3rd figure is MAM for the front axle of the vehicle, 4th figure is the MAM for the rear axle.

The MAM for the trailed load is not listed on the VIN plate seperately, you have to subtract figure 1 from figure 2.

For a 1993 Defender 90 Tdi they're as follows:

2,400 Maximum permitted vehicle mass
5,900 (-2,400 MAM for towing vehicle, leaving 3,500 trailed mass)
1,200 Front axle mass
1,380 Rear axle mass

Yes that looks like there's a weird bit of maths as 1,200 kgs for the front axle added to the 1,380 would be 2,580kgs... what it means is if you have 1,380 over the rear axle you're only allowed 1,020kgs over the front axle or you're breaking the law... see below:

Exceeding any of the figures stated on the VIN plate is an offence.

If you're in any doubt as to the accuracy of this... do like I did and phone VOSA!

redhand said:

Kerb weight is empty vehicle full tank of fuel and a driver. the GVW is the unladenweight plus max payload. So you can load the vehicle up and tow 3500Kg. on a 200tdi 3 door disco kerbweight is 2088KG but GVW is 2720Kg so it's payload is 632KG not including the driver. (unless he's a real fat bastid)

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redhand, I agree with you, it surprises me how many people own a Range Rover and don't know it capabilities or ever use it...

I"II bet there wouldn't be this discussion if the posters here were peeps who trialled/safaried/team recovered Land Rovers for fun or worked their veicles for a living come to that..... .

Adz said:

Blimey... this is like pulling teeth!

MAM = Maximum Admissable Mass as Redhand says.

There's a MAM for the vehicle, there's a MAM for the trailer, there's a MAM for the combination of trailer and vehicle.

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That's the bit that threw me, I assumed that MAM was a single defined value and related to a fixed combination, i.e. (car+trailer+load), whereas it's a term applicable to several combinations i.e. (car or trailer+load or car+trailer+load).

Now I think I understand.......