Hitachi ZX55U-5A Excavator 5T

Product Description

ENGINE
Model ……………………… Yanmar EDM-4TNV88
Type ……………………….. 4-cycle water-cooled, direct injection
No. of cylinders ………… 4
Rated power
ISO 9249, net ………….. 28.2 kW (37.8 HP) at 2 400 min-1 (rpm)
EEC 80/1269, net ……. 28.2 kW (37.8 HP) at 2 400 min-1 (rpm)
SAE J1349, net ……….. 28.2 kW (37.8 HP) at 2 400 min-1 (rpm)
Maximum torque ………. 139.6 Nm (14.2 kgfm) at 1 100 min-1 (rpm)
Piston displacement ….. 2.189 L
Bore and stroke ………… 88 mm x 90 mm
Batteries ………………….. 1 × 12 V / 72 Ah

HYDRAULIC SYSTEM
Hydraulic Pumps
Main pumps ……………. 1 variable displacement axial piston pumps
Maximum oil flw ……. 1 x 120 L/min
Pilot pump ………………. 1 gear pump
Maximum oil flw ……. 12.0 L/min
Hydraulic Motors
Travel …………………….. 2 variable displacement axial piston motors
Swing …………………….. 1 axial piston motor
Relief Valve Settings
Implement circuit ……… 24.5 MPa (250 kgf/cm2)
Swing circuit ……………. 18.3 MPa (187 kgf/cm2)
Travel circuit ……………. 24.5 MPa (250 kgf/cm2)
Pilot circuit ……………… 5.9 MPa (60.2 kgf/cm2)

UPPERSTRUCTURE
Revolving Frame
D-section frame for resistance to deformation.
Swing Device
Axial piston motor with planetary reduction gear is bathed in oil. Swing
circle is single-row. Swing parking brake is spring-set/hydraulic-released
disc type.
Swing speed …………… 9.0 min-1 (rpm)
Swing torque …………… 8.6 kNm (877 kgfm)
Operator’s Cab
Independent spacious cab, 1 049 mm wide by 1 611 mm high,
conforming to ISO* Standards. Reinforced glass windows on 4 sides
for visibility. Front windows (upper and lower) can be opened. Reclining
seat.
* International Organization for Standarization

UNDERCARRIAGE
Tracks
Tractor-type undercarriage. Welded track frame using selected materials.
Side frame welded to track frame.
Numbers of Rollers on Each Side
Upper roller …………….. 1
Lower rollers …………… 4
Travel Device
Each track driven by 2-speed axial piston motor.
Parking brake is spring-set/hydraulic-released disc type.
Automatic transmission system: High-Low.
Travel speeds ………….. High : 0 to 4.2 km/h
Low : 0 to 2.5 km/h
Maximum traction force 38.3 kN (3 905 kgf)
Gradeability …………….. 58% (30 degree) continuous

SERVICE REFILL CAPACITIES
Fuel tank ………………………………………………………………………….. 70.0 L
Engine coolant …………………………………………………………………….. 4.7 L
Engine oil …………………………………………………………………………… 8.6 L
Travel device (each side) ………………………………………………………. 0.9 L
Hydraulic system ………………………………………………………………. 66.0 L
Hydraulic oil tank ………………………………………………………………. 42.0 L

WEIGHTS AND GROUND PRESSURE
Operating Weight and Ground Pressure
-PILLAR CANOPY
Shoe type Shoe width Arm length kg kPa (kgf/cm2)
Rubber shoe 400 mm 1.38 m 4 850 27 (0.28)
1.69 m 5 080* 29 (0.29)*
Grouser shoe 400 mm 1.38 m 4 960 28 (0.29)
1.69 m 5 190* 29 (0.30)*
Pad crawler shoe 400 mm 1.38 m 5 020 28 (0.29)
1.69 m 5 250* 30 (0.30)*
Including 0.14 m3 (ISO heaped), bucket weight (109 kg).
* Including 0.14 m3 (ISO heaped), bucket weight (109 kg), additional counterweight
(200 kg).
CAB
Shoe type Shoe width Arm length kg kPa (kgf/cm2)
Rubber shoe 400 mm 1.38 m 4 980 28 (0.29)
1.69 m 5 210* 29 (0.30)*
Grouser shoe 400 mm 1.38 m 5 090 29 (0.29)
1.69 m 5 320* 30 (0.31)*
Pad crawler shoe 400 mm 1.38 m 5 150 29 (0.30)
1.69 m 5 380* 30 (0.31)*
Including 0.14 m3 (ISO heaped), bucket weight (109 kg).
* Including 0.14 m3 (ISO heaped), bucket weight (109 kg), additional counterweight
(200 kg).
BUCKET AND ARM DIGGING FORCE
Arm length 1.38 m 1.69 m
Bucket digging force ISO 36.8 kN (3 750 kgf) 36.9 kN (3 760 kgf)
Bucket digging force SAE :
PCSA 32.1 kN (3 270 kgf)
Arm crowd force ISO 24.0 kN (2 450 kgf) 21.0 kN (2 140 kgf)
Arm crowd force SAE :
PCSA 22.8 kN (2 330 kgf) 20.1 kN (2 050 kgf)

Spec Sheet