Power Train; Testing Swing Circle Bearing Clearance - Komatsu PC88MR-10 Shop Manual

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Power train

(ALL-C100-001-K-00-A)

a Testing tools

Commercially

Be careful not to put you hand or foot under

the undercarriage during the test.

(PC88MR-J117-365-K-00-A)

1. Fix dial gauge J to outer race (1) or inner race

(2) of the swing circle and put the probe to inner

race (2) or outer race (1) on the opposite side.

a Set dial gauge J at the front or rear of the

2. Set the work equipment in the maximum reach

posture, and set the bucket end to the height of

the under surface of the revolving frame.

a At this time, the front of the upper structure

lowers and the rear rises.

3. Set dial gauge J to the zero point.

4. Set the arm at about a right angle to the ground,

and lower the boom until the track shoe at the

front of the machine rises 150 to 200 mm above

a At this time, the front of the upper structure

rises and the rear lowers.

30 Testing and adjusting

(PC88MR-J117-360-K-00-A)

5. Under this condition, read dial gauge J.

a The value indicated by dial gauge J is the

bearing clearance.

6. Return the machine to the condition in step 2,

and check that dial gauge J indicates 0 point

a If the dial gauge does not indicate 0 point,

repeat steps 3 to 5.

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