jcb 4DX - Steering and Control Systems; Steering System Operation; Control Lever Functions; Loader and Excavator Control Patterns

3 / 4 MI1179-1 3 / 4
Steering System
Figure 4.
D
E
D Steering pump(Flow: 14 cc and Pressure:
125 Bar)
E Pump delivery hose
Independent steering pump for steering system.
Refer to the Service manual for hydraulic circuit.
Pump return connected to tank through the hydraulic
collar.
Controls
Figure 5.
G
F
E
H
E LHS servo control – for boom and slew
F RHS servo control lever – for dipper and
bucket
G Servo arm lock release pedal (Refer operator
manual for how to operated)
H Servo arm – having bush and greasing as
per maintenance schedule (Refer operator
manual)
Figure 6.
K
J
J LHS – Stabilizer Lever
K RHS – Stabilizer Lever
• Engine controls- Hand and foot throttle controls
are similar to 3DX Standard machine.
• Gear change- Similar to 3DX Standard
machine.
• Park and foot brake system are similar to
Standard 3DX Machine. Refer to the Operator's
manual on how to check the park brake.
• Loader lever- "JCB +" Pattern similar to
Standard 3DX Machine
• Excavator lever (Non servo machine)- similar to
3DX Machine
• Excavator control (Servo machine)- SAE "+"
Pattern. This is not same as the pattern used
in JCB Excavators. It is possible to change this
for a customer who wants his BHL control to be
the same as his excavator control. Refer to JCB
Service Department for details of this change.
Electrical Controls
Figure 7.
M
N
P
Q
R
L
S
L Hydro clamp switch
M Front work light switch
N Rear work light switch
P Servo (momentary) switch
Q Engine auto OFF - Deactivate switch
R Air condition switch
S Blower speed control knob
• Front Panel- Switches are similar to 3DX
Standard machine.
• All the working lights switches are similar to
3DX Standard machine.
Servo Momentary Switch
Press the switch once to actuate the servo system.