Komatsu PC20R-8 Shop Manual page 128

. FOR THE MACHINE
Classifi-
Check item
cation
Hydraulic drift of
travel motors
Leakage of travel motor
Total work equipment
(Downward movement
of tips of bucket teeth)
Boom cylinder
(Retraction)
Arm cylinder
(Extension)
Bucket cylinder
(Retraction)
Boom swing
20-12
Machine model
Test condition
Measuring posture
.
Engine stopped.
.
Hydraulic oil temperature: 45 ± 55ëC.
.
Machine parked on sloping ground.
.
Measure the drift after 5 minutes
.
Engine speed: high idling
.
Hydraulic oil temperature: 45 ± 55ëC
.
Lock shoe
Measuring posture
RKP01860
.
Bucket: rated load:
PC20R-8: 126 kg
PC27R-8: 135 kg
.
In this position, measure ex-
tension or retraction of each
cylinder, and any leakages oc-
curring when a load is applied
to the tips of the bucket teeth.
.
Horizontal and level ground
.
Levers: neutral
.
Engine: switched off
.
Oil temperature: 45 ± 55ëC.
.
Take measurements as soon
as the engine stops.
.
Measure the variations every 5
minutes and check the total
variation after 15 mins.
.
Bucket: rated load:
PC20R-8: 126 kg
PC27R-8: 135 kg
.
Engine stopped.
.
Hydraulic oil temp.: 45 ± 55ëC
.
In the same position as above,
stop the machine on a 15ë
slope and position the revol-
ving frame at 135ë. Measure
the extension and retraction of
the cylinder after 15 minutes.
Unit
mm
RKP02000
,
/min
Short arm
Long arm
Short arm
mm
Long arm
Short arm
Long arm
Short arm
RKP01990
mm
Long arm
PC20R-8
Standard Permissible
value value
Max. 200 Max. 240
Ð Ð
Max. 300 Max. 340
Max. 300 Max. 350
Max. 20 Max. 30
Max. 20 Max. 33
Max. 20 Max. 30
Max. 20 Max. 33
Max. 10 Max. 20
Max. 15 Max. 20
Max. 15 Max. 22
PC20R-8 PC27R-8