Practice Safe Maintenance - Hitachi EX1900-5 Operator's Manual

PRACTICE SAFE MAINTENANCE

To avoid accidents:
• Understand service procedures before doing work.
• Keep the work area clean and dry.
• Do not spray water or steam inside cab.
• Never lubricate or service the machine while it is mov-
ing.
• Keep hands, feet and clothing away from power-driven
parts.
Before servicing the machine:
1. Park the machine on a level surface.
2. Lower the bucket to the ground.
3. Turn the auto-idle switch off.
4. Run the engine at slow idle speed without load for 5
minutes.
5. Turn the key switch to OFF to stop engine.
6. Relieve the pressure in the hydraulic system by mov-
ing the control levers several times.
7. Remove the key from the switch.
8. Attach a "Do Not Operate" tag on the control lever.
9. Pull the pilot control shut-off lever to the LOCK posi-
tion.
10. Allow the engine to cool.
• If a maintenance procedure must be performed with
the engine running, do not leave machine unattended.
• If the machine must be raised, maintain a 90 to 110°
angle between the boom and arm. Securely support
any machine elements that must be raised for service
work.
• Never work under a machine raised by the boom.
• Inspect certain parts periodically and repair or replace
as necessary. Refer to the section discussing that part
in the "MAINTENANCE" chapter of this manual.
• Keep all parts in good condition and properly installed.
• Fix damage immediately. Replace worn or broken
parts. Remove any buildup of grease, oil, or debris.
• When cleaning parts, always use nonflammable de-
tergent oil. Never use highly flammable oil such as fuel
oil and gasoline to clean parts or surfaces.
• Disconnect battery ground cable (–) before making ad-
justments to electrical systems or before performing
welding on the machine.
SAFETY
500-E02B-0497
S-18
SA-028
SA-527