jcb JS200 Service Manual page 60

Section 3
10 - 3
Other Measurements
a. Travel Linearity.
The conditions for checking are that the machine should
have an approach of 5 metres and a travel distance of 20
metres; measurement is of the amount of deviation after 20
metres between the reference line and track shoe.
Approach the reference line and adjust the position of the
track shoe/travel direction against the reference line in the
first 5 metres, then without adjusting, allow the machine to
travel 20 metres, then measure the deviation, then complete
the same procedure in reverse.
b. Slew Backlash.
1. The conditions for checking is to position the bucket
in the open position slightly above ground and the
engine stopped.
2. Gently push the bucket from the side and put a mark
on the ground, this becomes the 'Zero Point'.
3. Then do the same for the opposite side of the bucket
and make a mark, the distance the bucket has
moved is the amount of backlash.
Note: If the front attachment is pushed from side to side
repeatedly or if there is leakage or the attachments are loose,
correct measurement will not be possible.
If the attachments are loose, position a dial gauge on the
turntable bearing and measure the movement here.
9803/6400
Routine Maintenance
Performance Evaluation JS200/JS240
*
MEASUREMENT METHOD
MEASUREMENT METHOD
Section 3
10 - 3
Issue 2*