Swing Bearing - Hitachi EX27U Operator's Manual

Swing Bearing --- every 250 hours
CAUTION: Lubricating both the swing bearing
and gear and rotating the upperstructure must be
done by one person. Before you lubricate the
swing bearing, clear the area off 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.
1. Park the machine on a level surface.
2. Lower the bucket and blade to the ground.
3. Run the engine at slow idle speed without load for
three minutes.
4. Turn the key switch OFF. Remove the key from the
key switch.
5. Pull the pilot control shut-off lever to the LOCK posi-
tion.
6. With the upperstructure stationary, apply grease by 2
or 3 (shots), using a grease gun.
7. Start the engine. Raise the bucket several inches off
the ground and rotate the upperstructure 90° (1/4
turn).
8. Lower the bucket to the ground.
9. Repeat the procedure 8 times (2 turns), beginning
with step 5.
10. Apply grease to the swing bearing until grease can
be seen escaping from the swing bearing seals.
11. Take care not to supply excessive grease.
MAINTENANCE
7-14
EX27u, EX35u
EX50u
M589-01-001
M588-07-014