Komatsu F30791, Shop Manual

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Machine model PC20R-8
Classifi-
cation
Check item Test condition Unit
Standard
value
Permissible
value
Boom
Measuring posture
.
Engine speed: low idling
.
Hydraulic oil temperature: 45 ± 55ëC
.
With the work equipment fully extended,
lower the boom and measure the time ta-
ken to raise the machine from when the
bucket reaches the ground.
sec.
Max. 2 Max. 2
Arm
Measuring posture
.
Engine speed: low idling
.
Hydraulic oil temperature: 45 ± 55ëC
.
Bring the boom into a horizontal position.
Retract the arm cylinder completely and
then extend it. Measure the time elapsing
from when the arm stops at dead centre
until it starts to move again.
Max. 2 Max. 2
Bucket
Measuring posture
.
Engine speed: low idling
.
Hydraulic oil temperature: 45 ± 55ëC
.
Bring the boom into a horizontal position.
Retract the bucket cylinder completely,
then extend it. Measure the time elapsing
from when the bucket stops at dead centre
until it starts to move again.
Max. 2 Max. 2
Blade
Measuring posture
.
Engine speed: low idling
.
Hydraulic oil temperature: 45 ± 55ëC
.
Raise the blade to its max. height, then
lower it. Measure the time that it takes to
raise the machine after the blade touches
the ground
Max. 1 Max. 1
. FOR THE MACHINE
20-18
PC20R-8 PC27R-8
Work
equipment
Time
lags
RKP01910
RKP01920
RKP01930
RKP01940