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2
PERFORMANCE CRITERIA
SERVICE DATA
Natural travel drop
• Engine: Stopped
• Hydraulic oil temp.: 50~60°C
• Gradient: 15°
• Measurement posture: Fully extend the boom, arm and
bucket cylinders and completely retract the dozer blade
cylinder.
• With the excavator parked at angle for 5 minutes, mea-
sur
e the extent of natural drop.
Slew time
• Engine: Maximum R. P. M.
• Hydraulic oil temp.: 50~60°C
• Measurement posture: Completely retract the arm cyl-
inder
, fully extend the bucket cylinder and adjust so that
boom foot pin and bucket pin are at matching height.
Rest the dozer blade on the ground.
• With the hoe attachment in a no-load state, wait 1 rota-
tion,
then measure the time required for the next 2 rota-
tions.
Overrun when slewing stops
• Engine: Maximum R. P. M.
• Hydraulic oil temp.: 50~60°C
• Measurement posture: Same as that for measuring slew
time.
• Draw matching marks on the outer race of the slew
bearing and lower frame at an exactly 180 degrees rota-
tion
from the starting point. With the hoe attachment in a
no-load state, rotate 180 degrees at, which point return
the operation lever to neutral. Measure the differential
between the position marks and the point the hoe at-
tachment stops.
Natural slew drop
• Engine: Stopped
• Hydraulic oil temp.: 50~60°C
• Gradient: 15°
• Measurement posture: Same as that for measuring slew
time.
• Rotate the upper machinery so that it is directly abeam
of the grade, then draw positional marks on the slew
bearing’s outer race and the lower frame. Then measure
the distance that develops between the marks after 5
minutes.
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