Safety Precautions General Unauthorized, indiscriminate welding or drilling may adversely affect the safe load-carrying characteristics of the chassis frame. Observe these recommended pro- cedures to protect electronic sys- tems during welding operations. Before welding on vehicles equipped with electronic engines, the following precautions should be observed: NOTE: Welding to frame rail may void frame rail warranty. Turn engine OFF. Disconnect all electronic connec- tions to the vehicle batteries. Remove battery power cable and insulate it from the vehicle. All Electronic Engines Welding Do not use the jack as the sole means of support; position suitable supports beneath the chassis frame.
Do not attempt to work on the vehicle with the cab partially tilted. Do not attempt to stand on the cab roof. Do not weld or subject the chassis frame to a severe localized heat source. Failure to observe this precaution may result in irreparable damage to the material structure of the chassis frame with consequent loss in chassis frame strength. Welding or drilling on the chassis frame must not be undertaken without the prior written consent of PACCAR Inc. Maintenance Activities Chassis Frame steering lock or its wiring. Under no cir- cumstances must the ignition switch be separated from the steering lock. Many liquids and other substances used in commercial vehicles are highly toxic.
These must not be consumed or inhaled and, as far as possible, must be kept from skin contact. These sub- stances, amongst others, include bat- tery acid, anti-freeze, hydraulic fluid, lubricants, fuel, windshield washer fluid, refrigerant, and various adhesives. Avoid unnecessary contact with used engine oil. Prolonged and repeated contact with used engine oil may cause serious skin disorders. Extreme care must be taken when draining engine oil; hot engine oil can cause severe personal injury. Oils and Lubricants