PERFORMANCE STANDARS 9VX3
Performance Judgement Procedures
If the user points out that “this machine lost power”, “the speed of this machine dropped” or “the
cylinder’s lowering amount is too great”, then a performance judgement is required. By so testing, a
quantitative performance level is obtained for each section of the machine, and the performance of the
machine is restored to its specified level by means of such treatment as the appropriate adjustment,
replacement or repair. The machine’s “standard value” in terms of which to judge the level of the
measured data, and the “allowance value” where the machine performance is lowered but allowable,
have been set. When the performance level is measured, if the conditions have changed, a correct
judgement is not available. Therefore, measure it under the specified conditions. (Refer to “Performance
Measurement Instructions” on the next page.
1. Measurement Location
(1) Flat and solid ground
(2) Clearing space for the attachment to swing with maximum reach.
(3) Clearing flat and solid ground where the machine can run 10 m straight.
(4) Safety measures such as “Keep Off” should be in place for the measurement (using ropes to mark
“Keep O ff’).
The meeting regarding work procedures and signs should be held in advance with other involved
parties.
2. Measuring Instruments
(1)
Stop watch
(2)
Scale
(3)
Thermometer
(4)
Inclination gauge
(5)
Pen, notebook, chalk and felt pen
3. Perform the measurement under the conditions specified.
If measurement conditions change, then measured values will in turn change, greatly. If the specified
conditions are not followed, record the actual conditions.
(1) If the manufacturer is to be consulted because of trouble, report the measurement conditions; in
particular, oil temperature and engine speed (max. speed without load, single pump relief, double
pump relief)
(2) The standard values are set under the condition of bucket without load (empty). However if it is
noticed that performance is degraded when load is applied (soil is in the bucket), then measure the
value in each case. That is often caused by lower oil temperature. Therefore, measure the relief
pressure and if it drops, adjust it.
(3) Perform the measurement three times and base the estimate on the average value. If any of the
values is greatly different, there may have been mistaken measurement. Re - measure.
6-1-1
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