. OPERATION MACHINE OPERATIONS AND CONTROLS SWINGING WARNING in use, left work equipment control lever (3) to switch (1) ON. 3 - 99 surrounding area is s afe before swinging be upper structure. Operate because the the levers engine s with peed care whe sharply r n th ises 1. Before starting th e swing o peration, tur n swing l ock s witch (1) OFF a nd check th at swing loc k monitor (2) has gone out. 2. upper wing the 3. When not swing, swin Check tha t swing lock monitor (2) lights up.