jcb JS70 Service Manual

Note: For full specification details see information in each section.
Pump
Type 2 stage tandem, variable capacity swash plate type axial piston pump
Displacement Volume 36 cm
3
/rev x 2 (2.196 in
3
/rev x 2)
Working Pressure 284.4 bar (4125 lbf/in
2
)
Maximum Output 79 l/min (17 U.K. gal/min)
Fixed Displacement Gear Pump Pilot Blade
Displacement Volume 10.7 cm
3
/rev (0.65 in
3
/rev) 12.1 cm
3
/rev (0.74 in
3
/rev)
Working Pressure 39.2 bar ( 569 lbf/in
2
) 217 bar ( 3146 lbf/in
2
)
Maximum Output 23 l/min (5 U.K. gal/min) 26 l/min (5.7 U.K. gal/min)
Total Dry weight 58kg (62 lb)
Control Valve (Main)
Type Hydraulic Pilot System
Operating System Set pressure relief
Main Relief
Standard Pressure Refer to Pressure Testing Section 4-1
Auxiliary Relief Valve Pressure
Boom Raising, Dipper, Bucket
Boom Lowering Pressure Refer to Pressure Testing Section 4-1
Function Travel priority, Slew priority, Boom and Dipper holding valves,
Boom and Dipper 2-Speed internal confluence
Dry Weight 66 kg (145.5 lb)
Control Valve (Blade)
Type Hydraulic Pilot System
Operating System Set pressure relief
Main Relief Refer to Pressure Testing Section 4-1
Auxiliary Relief Valve Pressure Refer to Pressure Testing Section 4-1
Dry Weight 4.5 kg (9.92 lb)
Slew Motor
Type Fixed displacement piston motor
Suction Capacity 45.5 cm
3
/rev 2.78in
3
/rev)
Working Pressure 206 bar (2987 lbf/in
2
)
Work Flow 75.6 l/min (16.63 U.K. gal/min)
Set Pressure Relief Refer to Pressure Testing Section 4-1
Reduction Gears Planetary gears with 2 gear reduction
Reduction Gear Ratio 19.464 : 1
Slew Brake
Brake Torque More than 16.8 kgf m (121.5 lbf ft) (not including reduction gear)
Brake Pressure Release Min 32.3 bar (469 lbf/in
2
)
Dry Weight 67 kg (148 lb)
1 - 1
Section E Hydraulics
9803/6020
Section E
1 - 1
Issue 1
Technical Data

jcb JS70 Specifications

General

Brand	jcb
Model	JS70
Category	Excavators
Language	English