Komatsu PC88MR-10 Shop Manual page 333

Swing
Item
Overswing
Time required to start
swinging
Time required to finish
swinging
Swing drift on slope
Leakage from swing motor
PC88MR-10
Machine model
Measurement condition
Arm length: 1650 mm
Bucket: Rated load (451 kg)
Arm length: 2100 mm
For measuring posture, see
"Swing 1"
Engine: High idle
Hydraulic oil temperature: 45
to 55 °C
Overswing of swing circle
after 1 turn
Bucket with no load
Value inside ( ): Overswing at
outside of swing circle
Arm length:
2100 mm
For measuring
posture, see
"Swing 1"
Engine: High
idle
Hydraulic oil
temperature: 45
to 55 °C
Time required to
pass 90° and
180° points
after starting
swing
Value in ( ): With
rated load
Arm length: 2100 mm
For measuring posture, see
"Swing 1"
Engine: High idle
Hydraulic oil temperature: 45
to 55 °C
Time required to complete 5
turns after 1 turn
Arm length: 2100 mm
For measuring posture, see
"Swing 2"
Stopping engine
Hydraulic oil temperature: 45
to 55 °C
Rated load of bucket (450 kg)
Set machine on 15 deg.
slope, and set upper
structure at 45 deg. to uphill
side.
Make matchmark between
swing circle outer race and
track frame
Distance between
matchmarks made in 15
minutes
Engine: High idle
Hydraulic oil temperature: 45
to 55 °C
Relieve swing circuit
20 Standard value tables
Standard value table for machine
Standard value
Unit
for new machine
deg.
(mm)
90 deg.
sec.
180 deg.
sec.
deg.
(mm)
l/min
PC88MR-10
Repair limit
49 ± 10 Max. 73.5
(-) (-)
2.6 ± 0.3 Max. 3.2
(3.0 ± 0.3) (Max. 3.6)
4.1 ± 0.4 Max. 4.7
(4.5 ± 0.4) (Max. 5.1)
30 ± 3 Max. 35
0 0
(0) (0)
Max. 3.5 Max. 7.0
20-9