Tow ball questions??

Quote:

Originally Posted by DiscoKym

Quote:

Originally Posted by JDNSW

From Series 3 Owners manual (1978) but probably much the same for all Series:-

Cross country 1020kg
Road & track unbraked 500kg
Override brakes 2040kg
Four wheels and independent power brakes
Petrol 4080kg
Diesel 3060kg

Towbars did not require marking with rating (or anything else) before about 1990.

John

I notice in my Disco 2 Owner's Manual it says 1000kg off road. I see it is a rating used and recognised since the 1970's... I have started reading the same in camper trailer magazines so it looks like the non Land Rover set is realising this some 40 years after Land Rover.

Found a few Camper Trailer salesmen don't like you calling their off road camper trailers dirt road because they weight too much...

Quote:

Originally Posted by Rover Co. Ltd. Part No.4852

Owners Maintenance Manual, September 1966, re-issued August 1967.
Page 118 - General Data
Maximum drawbar pull:
Engine | Regular | reg StnWgn | Long W/B | Long StnWgn | 110 F/C | 110F/C 6 cyl
Petrol. | 1,800 kg | 1,800 kg | 1,600 kg | 1,600 kg | 1,800 kg | 1,973 kg
Diesel | 1,497 kg | 1,497 kg | 1,315 kg | 1,315 kg | 1,800 kg | n/a

Interesting that there are such vast differences in John's SIII books.

Now that raises the question: Does drawbar pull equate to a maximum trailer mass (ATM)? Or: Does it equate to the maximum effort that can be applied to the tow coupling? i.e. the tractive effort required to move the trailer (irrespective of the unsprung mass).

In relation to the comment about being further reduced, if for example a rated tow ball is fitted then irrespective of the specifications of the vehicle or the rest of the hitch the max trailer will be reduced to the max of the ball. e.g. 1 7/8" balls are rated as low as 2000lbs (907 kg)

Addit: Just found this, likely the same as the originals.
https://www.aulro.com/afvb/

Quote:

Originally Posted by Lotz-A-Landies

Now that raises the question: Does drawbar pull equate to a maximum trailer mass? Or: Does it equate to the maximum effort that can be applied to the tow coupling? i.e. the tractive effort required to move the trailer (irrespective of the unsprung mass).

For heavy trucks tow bars are rated under braking of 1G with the trailed load acting forwards and downwards at a 20 degree angle.
There are limits on material stress in that situation.

The forces you can put on a towbar when the tow vehicle just hit something is far in excess of any pulling force you can apply. The major safety concern is to keep the tow vehicle and trailer attached in that worst-case situation.

Yeah, a beautiful vehicle, but I don't think I fall into their target market, somehow.