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Hitachi ZW 550-G Technical Manual page 39

Wheel loader

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Standard Measurement Values for Performance Check
For Asia and Africa (S/N 0101~)
Measurement conditions
Temperature of torque converter oil: 50 ~ 80°C (120 ~ 180°F)
Temperature of hydraulic oil: 50 ~ 80°C (120 ~ 180°F)
Temperature of engine coolant: 50 ~ 80°C (120 ~ 180°F)
System
Engine speed
-1
(min
) (rpm)
Clutch pressure
2
MPa (kgf/cm
) (psi)
Clutch time lag
(sec)
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)
Item
Measurement item
Minimum no-load speed, Low Idle (LI)
Maximum no-load speed, High Idle (HI)
Maximum speed in torque converter stall mode
Maximum speed in multiple control valve relief mode
Maximum speed in torque converter stall plus multiple
control valve relief mode
Low idle
Engine speed
High idle
Neutral→Forward 1st speed
-1
(engine speed: 1,500 min
(rpm))
Boom cylinder
Bucket cylinder
Idling (LI)
Engine speed
1,500 min
Maximum (HI)
Idling (LI)
Engine speed
1,500 min
Maximum (HI)
Standard Measurement Values for Performance Check
1st speed
Except 1st speed
1st speed
Except 1st speed
-1
(rpm)
-1
(rpm)
Measurement for Performance Check
Standard measurement val-
ues for performance check
Normal
Power
775 ± 50
2,350 ± 50
2,130 ± 100
2,140 ± 100
+150
+150
1,520
1,650
- 100
- 100
2.2~2.3 (22~23) (313~327)
2.5~2.6 (25~26) (356~370)
2.5~2.6 (25~26) (356~370)
2.6~2.9 (27~30) (384~427)
0.3 ± 0.1
3 (1/8) or less
4 (5/32) or less
23 ± 3.0
10.5 ± 1.0
8.4± 0.5
5.0 ± 0.5
3.9 ± 0.3
3.9 ± 0.3
03-3
Remarks
Before wheels move

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