The levers either side of the radiator are probably the Cab springing. The chassis is very flexible and the cab is rigidly mounted at the rear onto brackets on the chassis, but at the front the cab rests on plates, and there are twin bolts which pass throughtwo more plates rivetted or bolted to the cab, The bolts aren't tightened down rigidly, but only enough to partially compress fairly strong springs which under normal road use keep the cab in contact with the chassis, but in extreme off road conditions as the chassis twists, one or other corner of the cab can lift, compressing tfurther these springs, but preventing it from tearing itself apart,