Swing Bearing - Hitachi Zaxis 33U-5A Operator's Manual

Swing Bearing

--- every 250 hours
d
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 of all persons. Lower the bucket to the
ground. Stop the engine. Pull the pilot control shut-off
lever to the LOCK position.
1. Park the machine following the same procedures as
described on page 7-7 for preparation for inspection and
maintenance.
2. Apply grease via grease fitting (1) with a grease gun by
two to three strokes.
3. Start the engine. Push pilot control shut-off lever to the
UNLOCK position. Raise the bucket approx. 200 mm (8
in) above the ground and rotate the upperstructure 90 °
(1/4 turn).
4. Lower the bucket to the ground.
5. Repeat the procedure (Step 1 to 4) 8 times.
6. Apply grease to the swing bearing until grease can be
seen escaping from the swing bearing seals. Take care
not to supply excessive grease.
MAINTENANCE
7-22
MADB-07-009
1