ZX8U-2

Description

Model Code	ZX8-2
Engine Rated Power	9.5 kW (12.9 PS)
Operating Weight	1100 kg
Backhoe Bucket	0.022 m³

ENGINE

Model	Yanmar 3TNV70
Type	Water-cooled, 4-cycle, 3-cylinder swirl combustion chamber injection type diesel engine
Rated power ISO 9249, net	9.5 kW (12.9 PS) at 2100 min^-1 (rpm)
Maximum torque	50.5 N m (5.1 kgf m) at 1500 min^-1 (rpm)
Piston displacement	0.854 L (854 cc)
Bore and stroke	70 mm x 74 mm
Batteries	1 x 12 V/36 Ah

HYDRAULIC SYSTEM

The proven 2-pump sysytem has been improved to make combined operations and fine control easier and smoother.

Main pumps	2 gear pumps
Main pumps Maximum oil flow	2 x 10.6 L/min
Pilot pump	1 gear pump
Pilot pump Maximum oil flow	5.3 L/min

Relief Valve Settings

Main pumps circuit	17.7 MPa (180 kgf/cm²)
Pilot circuit	3.9 MPa (40 kgf/cm²)

Hydraulic Cylinders
High-strength piston rods and tubes. Cylinder cushion mechanisms provided in boom raise and arm roll-in circuits to absorb shocks at stroke ends.

Dimensions

CONTROLS

Control is all mechanical.

SWING MECHANISM

Hight-torque, orbit motor. Swing circle is single-row, shear-type ball bearing with induction-hardened internal gear. Internal gear are immersed in lubricant.

Swing speed	8.5 min^-1 (8.5 rpm)

UNDERCARRIAGE

Tracks
Tractor-type undercarriage. Welded track frame using carefully selected materials. Side frame extends by span cylinder.

Numbers of Rollers on Each Side

Lower rollers	2

Travel Device
Each track driven by a high-torque, 2-speed axial piston motor through planetary reduction gear, allowing counter-rotation of the tracks.

Travel speeds (with rubber shoes)	High : 0 to 4.0 km/h Low : 0 to 2.0 km/h
Gradeability	58 % (30 degreess) continuous

WEIGHTS AND GROUND PRESSURE

Equipped with 0.70 m arm and 0.022 m3 (ISO 7451 capacity) bucket.

SERVICE REFILL CAPACITIES

Fuel tank	16.0 L
Engine coolant	3.3 L
Engine oil	2.8 L
Travel device (each side)	0.33 L
Hydraulic system	18.0 L
Hydraulic oil tank (Reference oil level)	12.0 L

BACKHOE ATTACHMENTS

BUCKETS

A: General digging B: Light-duty digging

Note:
The illustration shows the ZX8-2 equipped with 0.70 m arm and 180 mm rubber shoes.

Unit: mm

METRIC MEASURE
Notes:
1. Ratings are based on ISO 10567.
2. Lifting capacity of the ZAXIS Series does not exceed 75 % of tipping load with the machine on firm, level ground or 87 % full hydraulic capacity.
3. The load point is the centre-line of the bucket pivot mounting pin on the arm.
4. *Indicates load limited by hydraulic capacity.
5. 0 m = Ground.