OM2033 Safety - Section 20 General Safety Page 20-13 WHEN REPAIRS ARE NECESSARY 1. Only qualified maintenance personnel who understand the systems being repaired should accomplish repairs. Towing Procedure in OPERATING INSTRUC- TIONS.) 10. Drain, clean and ventilate fuel tanks and/or hydraulic tanks before making any welding repairs. 2. Many components on the Komatsu Truck are large and heavy. Insure that lifting equipment - hoists, slings, chains, lifting eyes - are of ade- quate capacity to handle the lift. 3. DO NOT WORK under a suspended load. Do not work under raised body unless body safety cables, props, or pins are in place to hold the body in up position.
Any operating fluid, such as hydraulic oil or brake fluid escaping under pressure, can have sufficient force to enter a person's body by pene- trating the skin. Serious injury and possibly death may result if proper medical treatment by a physician familiar with this injury is not received immediately. 4. Do not repair or service truck while engine is running, except when adjustments can only be made under such conditions. Keep a safe dis- tance from moving parts. 5. When servicing any air conditioning system with refrigerant, wear a face shield and cold resistant gloves for protection against freezing. Be cer- tain to follow all current regulations for handling and recycling refrigerants.
11. Relieve pressure in lines or hoses before mak- ing any disconnects. 6. Follow package directions carefully when using cleaning solvents. 12. After adjustments or repairs, replace all shields, screens and clamps. 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 second cable to connect the 24V negative (-) post of the auxiliary assist battery to a frame ground (-) on the disabled truck away from the battery. 13. Tire Care: Do not stand in front of rim and locking ring when inflating tire mounted on the machine.
Observers should not be permitted in the area and should be kept away from the side of such tires. 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 battery charging alternator lead wire and isolate electronic control compo- nents before making welding repairs. (It is not necessary to disconnect or remove any control circuit cards on Komatsu Electric Drive Trucks or any of the AID circuit control cards.) Do not weld or apply heat on the rim assembly with the tire mounted on the rim.
Resulting gases inside the tire may ignite, causing explosion of tire and rim. Always fasten the welding machine ground (-) lead to the piece being welded; grounding clamp MUST BE ATTACHED AS NEAR AS POSSIBLE to the weld area . Never allow welding current to pass through ball bearings, roller bearings, suspensions, or hydraulic cylin- ders. Always avoid laying welding cables over or near the vehicle electrical harnesses. Weld- ing voltage could be induced into the electrical harness and possibly cause damage to compo- nents. 14.
Only a qualified operator or experienced main- tenance personnel who are also qualified in operation should move the truck under its own power in the repair facility or during road testing after repairs are complete. 9. If truck is to be towed for any reason, use a rigid tow bar. Check truck cab for decal recommend- ing special towing precautions. (Also refer to