Swing Bearing - Hitachi 120-3 class Operator's Manual

2
Swing Bearing --- every 500 hours
CAUTION: Lubricating both the swing bearing and
gear and rotating the upperstructure must be done
by one person. Before you lubricate the swing bear-
ing, clear the area of all persons.
Each time you leave the cab
• Lower the bucket to the ground.
• Stop the engine.
• Pull the pilot control shut-off lever to the LOCK
position.
• Use handrails.
1. Park the machine on a level surface.
2. Lower the bucket to the ground.
3. Turn the auto-idle switch off.
IMPORTANT: The turbocharger may be damaged if the
engine is not properly shut down.
4. Run the engine at slow idle speed without load for five
minutes.
5. Turn the key switch OFF. Remove the key from the key
switch.
6. Pull the pilot control shut-off lever to the LOCK position.
7. With the upperstructure stationary, apply grease via the
two grease fittings.
8. Start the engine. Raise the bucket several inches off the
ground and rotate the upperstructure 45° (1/8 turn).
9. Lower the bucket to the ground.
10. Repeat the procedure three times, beginning with step 3.
11. Apply grease to the swing bearing until grease can be
seen escaping from the swing bearing seals.
Model
ZX120-3 Class
ZX180-3, 200-3 Class
ZX270-3 Class
ZX330-3 Class
12. Take care not to supply excessive grease.
MAINTENANCE
Capacity
0.25 L
0.30 L
0.35 L
0.40 L
7-18
M157-07-159