Check O-Rings In Bucket Joints - Hitachi Zaxis 850LC-3 Operator's Manual

10 Check O-rings in Bucket Joints --- daily
O-rings (1) are provided on both ends of the bucket joint pins
as illustrated to the right, to prevent soil from entering the
bucket joints and retain the grease in the bucket joints. There-
by, wear on the bucket joint parts such as the pins and the arm
tip can be reduced. Check O-rings (1) for cracks or any damage.
If any, replace the O-ring while referring to the separation type
O-ring installation method described below.(There are two
kind of O-ring type.)
Type A (Separation Type O-ring) Installation Method
1. Install the O-ring (1) in the direction as illustrated to
the right so that the separation section of the O-ring (1)
does not directly come in contact with soil to protect the
O-ring (1) from being damaged quickly by soil or foreign
matter.
2. Install the O-ring (1) with care not to make a gap in the
separation section of the O-ring.
3. After installing the O-ring (1), cut off the bolt extended
from the nut so that the O-ring is not damaged by soil
which may come in contact with the bolt.
Type B (Unit Type O-ring) Installation Method
Slide O-rings (2) out of the way, as shown
MAINTENANCE
1
1
Cut off the bolt
extended from
the nut.
Bucket
Boss
7-102
1
1
Separation
Section
1
Type A
O-Ring Shift
2
Type B
M1JB-07-049
M1J1-07-074
M104-07-063