Komatsu PC20R-8 Shop Manual page 126

. FOR THE MACHINE
Classifi-
Check item
cation
Internal leakage from
swing motor
Travel motor swing
speed (1)
(no-load)
Travel speed (2)
Travel deviation
20-10
Machine model
Test condition
.
Engine speed: high idling
.
Hydraulic oil temperature: 45 ± 55ëC
.
Swing lock: engaged
.
Measure the leakage
.
Pressurize circuit.
Measuring posture
RKP01950
.
Engine speed: high idling
.
Hydraulic oil temperature: 45 ± 55ëC
.
Rest the bucket on the ground,
raise one track-shoe, rotate one
turn, then measure time taken for
next.
Measuring posture
.
Engine speed: high idling
.
Hydraulic oil temperature: 45 ± 55ëC
.
On flat ground
.
Travel for at least 10 metres and
then check on the time needed to
cover 20 metres
.
Engine speed: high idling
.
Hydraulic oil temperature: 45 ± 55ëC
.
Travel 20 metres on flat ground and mea-
sure the deviation.
H
The surface must be firm and horizontal.
20m
X
10m
H
Measure dimension «X»
Unit
,
/min
sec
sec
RKP01850
RKP01850
mm
RKP01830
PC20R-8
Standard Permissible
value value
0.6 Max. 1.0
25.0 21 ± 29
13.0 11 ± 15
33.0 29 ± 37
16.5 14 ± 19
Max. 500 Max. 550
PC20R-8 PC27R-8