OM2032 03/13 Safety - Section 20 Page 20-15 WHEN REPAIRS ARE NECESSARY 1. Only qualified maintenance personnel, who understand the systems being repaired, may attempt repairs. 9. If the truck is to be towed for any reason, always consider any special precautions. Refer to Section 30, Operating Instructions - Towing, for instructions on how to properly tow the truck. 2. Many components on the truck are large and heavy. Ensure that lifting equipment is of ade- quate capacity to handle the lift. 10. Drain, clean and ventilate fuel tanks and/or hydraulic tanks before making any welding repairs. 3. DO NOT stand under a suspended load.
DO NOT work under a raised body unless the body retention cable is in place to hold the body in the raised position. 11. Relieve pressure in lines or hoses before mak- ing any disconnects. 4. DO NOT repair or service the truck while the engine is running, except when absolutely nec- essary. Keep a safe distance from moving parts. 5. When servicing an air conditioning system charged with refrigerant, wear a face shield and cold resistant gloves for protection against freezing. Follow all current regulations for han- dling and recycling refrigerants. Any operating fluid, such as hydraulic oil escap- ing under pressure, can have sufficient force to enter a person's body by penetrating the skin.
Serious injury and possibly death may result if proper medical treatment by a physician familiar with this injury is not received immediately. 6. Follow package directions carefully when using cleaning solvents. 7. If an auxiliary battery assist is needed, first use one cable to connect the 24V positive (+) post of the disabled truck batteries to the 24V posi- tive (+) post of the auxiliary assist. Use the sec- ond cable to connect the 24V negative (-) post of the auxiliary assist battery to a frame ground (-) on the disabled truck, away from the battery. 12. After adjustments or repairs, replace all shields, screens and clamps. 13. Use extreme caution when working near tires and rims.: 8.
Always disconnect the positive and negative battery cables of the vehicle before doing any welding on the unit. Failure to do so may seri- ously damage the battery and electrical equip- ment. Disconnect the battery charging alternator lead wire and isolate electronic con- trol components before making weld repairs. DO NOT stand in front of a rim and locking ring when inflating a tire mounted on the machine. Observers must not be permitted in the area and must be kept away from the sides of such tires. DO NOT weld or heat the rim assembly with the tire mounted on the rim. Gases inside the tire may ignite, causing explosion of the tire and rim.
Always fasten the welding machine ground (-) lead to the piece being welded. The grounding clamp must be attached, as near as possible, to the weld area. Never allow welding current to pass through ball bearings, roller bearings, sus- pensions, or hydraulic cylinders. Avoid laying welding cables over or near the vehicle electri- cal harnesses. Welding voltage could be induced into the electrical harness and cause damage to components. 14. Only a qualified operator may operate the truck in the repair facility or during road testing after repairs are complete.