TROUBLESHOOTING /SYSTEM PERFORMANCE

Ｄ-1. Lift arm fails to rise or is slow to rise.

Measure rising time of lift arm

When a user complains that the lift arm is slow to rise, first m easure the time required for the lift arm to rise to the specified height in order to determi ne whether the user feels the lift arm motion to be slow or it is really slow due to malfu nction.

1. Measure the time required to move up the lift arm from ground level to the maximum height, in accordance with the description in the section of measurement of system performance.

Note: 1. The values shown above are standard values for new mach ines. With machines that have been operated for some time, the time w ill be slightly longer than

Much longer than the standard time

（１）Too low fluid level in hydraulic fluid tank

Standard time Normal

Troubleshooting