Maintenance
Safety, Operation and Maintenance Manual - Aug 2012
5-50
SY115C9/135C/155H Crawler Hydraulic Excavator
1. Park your machine on a level ground.
Lower the bucket to the ground, in an at-
titude shown in the right illustration.
2. Run the engine at low speed. Fix the
bucket on the ground. Slowly turn the
upper structure counterclockwise till the
inside of the left side of the bucket contact
closely with the left end surface of the arm.
3. Shut off the engine. Lock out and tag out
your machine before proceeding. See
“Lock-out tag-out” on page 2-60.
4. Move the O-ring (1) and measure the
clearance (a). It is easy to obtain accurate
result with a feeler gauge.
5. Loosen the four plate-mounting bolts (2) in
order to detach the plate (3). The spacer
has an opening, so it is unnecessary to
remove the bolt when making adjustment.
6. Remove the spacer equivalent to the
measured clearance (a).
(For example)
If the clearance is 3 mm (0.118 in), remove
two 1.0 mm (0.039 in) spacers and one 0.5
mm (0.02 in) spacer, or one 2.0 mm (0.078
in) spacer and one 0.5 mm (0.02 in) spac-
er. The clearance is reduced to 0.5 mm
(0.02 in). The spacers (4) include three
types, 2.0 mm (0.078 in), 1.0 mm (0.039 in)
and 0.5 mm (0.02 in). When the clearance
(a) is less than one spacer, no adjustment
shall be made.
7. Tighten the four bolts (2).
If it is difficult to tighten the bolts (2), re-
move the pin-retaining bolt (5) before tight-
ening the bolts (2).
CZ335-1104028
1
6
7
4
5
2
3
a
CZ335-1104029
Fig. 5-41
Fig. 5-42
