the right front wheel is suspended about 30mm above the pavement While the mower is fairly horizontal in this photo, the ground falls away near the front right wheel. There does not appear to be any travel in wheel height of the suspended wheel. Placing about 5kgs over the front right wheel causes it to go to ground and the left rear wheel then lifts by the same 30mm. In other words, no suspension and a rigid frame.
I can't find any information online that suggests this mower has a pivoting front axle and can't find any parts manuals but
from what I can see in the images with the centre front mounting bolt it looks like it should pivot ,I would loosen the bolt
and see if the front axle will move .
Cheers
Max.
