Power Train; Test Swing Circle Bearing Clearance; Method For Testing Swing Circle Bearing Clearance - Komatsu PC500LC-10R Shop Manual

30 TESTING AND ADJUSTING

POWER TRAIN

TEST SWING CIRCLE BEARING CLEARANCE

Tools for testing swing circle bearing clearance
Symbol Part No.
Commercially
A
available
k
Do not put your hand or foot under the truck during the test.
For testing of swing circle bearing clearance to perform troubleshooting, refer to this section.

METHOD FOR TESTING SWING CIRCLE BEARING CLEARANCE

1.
Fix dial gauge A to outer race (1) or inner race (2) of the
swing circle, and put the probe to the end surface of inner
race (2) or outer race (1) on the opposite side.
Set dial gauge A in the front or rear of the machine.
2.
Set the work equipment to the maximum reach posture,
and set the bucket tip to the height of the underside of the
revolving frame.
The front side of the upper structure lowers and the rear
side rises.
3.
Set dial gauge A to the zero point.
4.
Set the arm almost perpendicular to the ground and lower
the boom until the front part of the tracks float by 150 to
200 mm.
The front side of the upper structure rises and the rear side
lowers.
5.
Read the value indicated by dial gauge A.
The value indicated by dial gauge A is the clearance of the
bearing.
6.
Return the machine to the state in step 2, and check that
dial gauge A indicates 0 point again.
If the dial gauge does not indicate 0 point, repeat steps 3
through 5.
PC500LC-10R
Part name
Dial gauge
TEST SWING CIRCLE BEARING CLEARANCE
Q'ty
1
Remarks
30-57