Komatsu 830E Shop Manual page 31

1. Only qualified maintenance personnel who understand the systems being repaired should accomplish repairs.
2. Many components on the Komatsu Truck are large and heavy. Insure that lifting equipment - hoists, slings,
chains, lifting eyes - are of adequate 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.
4. Do not repair or service truck while engine is running, except when adjustments can only be made under such
conditions. Keep a safe distance 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 certain to follow all current regulations for handling and recycling refrigerants.
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 positive (+) post of the auxiliary assist. Use second cable to connect the 24V nega-
tive (-) post of the auxiliary assist battery to a frame ground (-) on the disabled truck away from the battery.
8. Always disconnect the positive and negative battery cables of the vehicle before doing any welding on the
unit. Failure to do so may seriously damage the battery and electrical equipment. Disconnect battery charging
alternator lead wire and isolate electronic control components before making welding repairs. (It is not neces-
sary to disconnect or remove any control circuit cards on Electric Drive Dump Trucks or any of the "AID" cir-
cuit control cards.)
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 cylinders. Always avoid laying welding cables over or
near the vehicle electrical harnesses. Welding voltage could be induced into the electrical harness and possi-
bly cause damage to components.
9. If truck is to be towed for any reason, use a rigid tow bar. Check truck cab for decal recommending special
towing precautions. (Also refer to Towing Procedure in OPERATING INSTRUCTIONS.)
10. Drain, clean and ventilate fuel tanks and/or hydraulic tanks before making any welding repairs.
Any operating fluid, such as hydraulic oil or brake fluid escaping 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.
11. Relieve pressure in lines or hoses before making any disconnects.
12. After adjustments or repairs, replace all shields, screens and clamps.
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.
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.
14. Only a qualified operator or experienced maintenance 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.
A03020
WHEN REPAIRS ARE NECESSARY
General Safety and Operating Instructions A3-17