jcb JS300 Service Manual page 194

9. Check the clearance.
Check the Clearance
WARNING If two people are doing this job make sure that the person working the controls is a competent
operator. If the wrong control lever is moved, or if the controls are moved violently, the other person could
be killed or injured.
1. Set the machine as shown with boom ram fully extended. Refer to Figure 154.
2. Move the dipper out and then slowly back in, make sure the dipper stops short of a full stroke on the dipper
ram.
3. Make sure the clearance is correct.
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Operation
Working with the Excavator Arm
119