PLATE 4773990 - Caterpillar

Illustration 1 g00575087
Differential Lock Control Valve (1) Plunger (2) Spool (3) Exhaust port (4) Delivery port (5) Valve (6) Supply portThe differential lock control valve controls the supply of air to the differential lock cylinder. When you depress the differential lock pedal, plunger (1) and spool (2) move downward and unseat valve (5). This allows air to flow from supply port (6) to the locking piston through delivery port (4). When you release the differential lock pedal, the valve is allowed to return. This blocks supply port (6). The air is allowed to flow from the locking piston through exhaust port (3).