Komatsu PC20R-8 Shop Manual page 124

. FOR THE MACHINE
Classifi-
Check item
cation
Braking angle
Time taken to start swing
Time taken for to swing
Hydraulic drift of swing
20-8
Machine model
Test condition
Work equipment at max. reach
.
No load in bucket
.
Engine speed: high idling
.
Hydraulic oil temperature: 45 ± 55ëC
.
Make centering marks on the outer swing
circle rings. Rotate the revolving frame
360ë and lock in position. Measure the dif-
ference between the marks after stopping.
Work equipment at max. reach
.
No load in bucket
.
Engine speed: high idling
.
Hydraulic oil temperature: 45 ± 55ëC
.
Measure the time taken for swings
to start from positions at 90ë and
180ë.
Work equipment at max. reach
.
No load in bucket
.
Engine speed: high idling
.
Hydraulic oil temperature: 45 ± 55ëC
.
Make one turn to settle machine
.
Measure the time taken to make 5 full
swings.
.
Load in bucket: PC20R-8: 126 kg
PC27R-8: 135 kg
.
Engine switched off
.
Hydraulic oil temperature: 45 ± 55ëC
.
Park the machine on a 15ë slope and posi-
tion the boom at 135ë with respect to the
ground surface.
.
On the outer swing circle, mark the posi-
tion between revolving frame and track
frame. After 15 minutes measure the drift.
Unit
Degree
(mm)
RKP01840
90ë
sec
RKP01840
180ë
sec
RKP01840
mm
RKP01990
(Degree)
PC20R-8
Standard Permissible
value value
18ë Max. 22ë
(42) (Max. 51.4)
1.8 ± 2.2
2.0
3.8 3.4 ± 4.2
34.0 Max. 38.0
175 Max. 210
(75ë) (Max. 90ë)
PC20R-8 PC27R-8