. SAFETY PRECAUTIONS FOR MAINTENANCE 2 - 30 STOP ENGINE BEFORE PERFORMING INSPECTION AND MAINTENANCE Always sto p the machine before performing any inspection and maintenance. Lower t he d ump body completely, set dump (1) to HOLD position ck (2), then the engine. Set parking brake s witch (3) to PARKING p osition to apply the parking brake, then put blocks i n front of an d behind t he tire s to prevent the machin e from moving.