Fiat Kobelco EX355 Tier2, Техническое руководство

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T4-4-8 EX355
EXCAVATOR TEST
SWING BEARING PLAY
Summary:
Measure the swing bearing play using a dial gauge to
check the wear of bearing races and balls.
Preparation:
1. Check swing bearing mounting bolts for looseness.
2. Check the lubrication of the swing bearing. Confirm
that bearing rotation is smooth and without noise.
3. Install a dial gauge on the track frame as shown,
using a magnetic base.
4. Position the upperstructure so that the boom aligns
with the tracks facing towards the front idlers.
5. Position the dial gauge so that its needle point
comes into contact with the bottom face of the
bearing outer race.
6. Bucket should be empty.
Measurement:
1. With the arm rolled out and bucket rolled in, hold
the bucket so that the height of the bucket pin is the
same as the boom foot pin. Record the dial gauge
reading (h
1
).
2. Lower the bucket to the ground and use it to raise
the front idler 0.5 m (20 in). Record the dial gauge
reading (h
2
).
3. Calculate bearing play (H) from this data (h
1
and h
2
)
as follows:
H=h
2
-h
1
Measurement: (h
1
)
Evaluation:
Refer to the Performance Standard Table in Group
T4-2.
SM0149
SM0152 SM0144
Measurement: (h
2
)
SM0150
The same height as the
boom foot pin height