Hitachi ZW370 Technical Manual page 42

ZW370 FS 03-4
03 Measurement for Performance Check
Standard Measurement Values for Performance Check
System
Cylinder drift
(when boom and
bucket are
horizontal and with
no load)
(mm/min) (in/min)
Boom rising time
(no load)
(sec)
Full steering time
(sec)
Relief valve setting
pressure
2
MPa (kgf/cm ) (psi)
Fan maximum
revolution (HI)
-1
min (rpm)
Fan minimum
revolution (LI)
-1
min (rpm)
Item
Measurement item
Boom cylinder
Bucket cylinder
Idling (LI)
Engine speed 1,500 min
Maximum (HI)
Idling (LI)
Engine speed 1,500 min
Full accelerated engine speed
Loading line main relief pressure (HI)
Loading line overload relief pressure (LI)
Steering line main relief pressure (HI)
Steering line overload relief pressure (LI)
Pilot line reducing pressure (LI)
Engine water temp. <80ºC (180ºF)
T/C oil temp. <110ºC (230ºF)
Hydraulic oil temp. <90ºC (195ºF)
Engine water temp. >95ºC (205ºF)
T/C oil temp. >115ºC (240ºF)
Hydraulic oil temp. >95ºC (205ºF)
Engine water temp. <60ºC (140ºF)
Engine idle revolution
Standard measurement
values for performance check
Normal
-1
(rpm)
-1
(rpm)
Fuel efficient
mode
3 (1/8) or less
4 (5/32) or less
23±3.0
10.5±1.0
6.7±0.5
5.0±0.5
2.4±0.3
2.4±0.5
20.6±0.5 (210±5)
(2,986±71)
Run engine at lowest
23.5±0.5 (240±5)
possible speed while
(3,413±71)
setting
20.6±0.5 (210±5)
(2,986±71)
Run engine at lowest
+1.0 +10
24.5 (250 )
0 0
possible speed while
+142
(3,555 )
0
setting
Run engine at lowest
3.5 (36)
possible speed while
(512)
setting
+75
910
- 200
+100
1,300
- 50
+50
750
- 200
Remarks