Talk Morgan Forums Morgan Sports Cars Maintenance & Servicing Car Hoist Lifting Points

It begs the question of how the dealers lift the cars using their commercial lifts if a Morgan chassis is so “ fragile”.
The Holden scissor lift is tempting me and the videos on their website show it in action.
If I jack up my Morgan it is always front or back, never one corner. Never had to use the small jack to change a wheel yet either.
Jacking beam for the rear and central on the Crosshead at the front. Axle stands at recommended points where triangulation points of crossmembers/ chassis parts coincide

In 2015 I made finite element modelling on a 2005 PLUS 4 chassis making assumptions on the weight distribution but checking that I got the same measured weight on the wheels than during the MOT.
It could give an idea of the structural deformation and stress in the chassis and particulary in the girder which is a critical element.

For example when you lift the car under the first cross member ( see picture :point de levage) the maximum constraint is 4.84 daN/mm².

The maximum is 6,26 daN/mm² (von Mises constraint) when you lift the car by the rear croos member.
Minimum is on front cross frame (3,11 daN/mm²).

I don't know what steel is used by Morgan, but with a 36 daN/mm² elasticity limit steel you get a safety coefficient of 6.

You can use any cross member without stressing the chassis, some are better than other.