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MANAGEMENT INFORMATION
DATE: 08/2014 ISSUE: 1 NUMBER: MI1179
SUBJECT: Introduction of Upgrade Version of Backhoe Loader Variants
PRODUCTS AFFECTED:
3DX (01491201 - 01502999),
4DX (01415101 - 01416999)
TERRITORIES AFFECTED: India
TO BE CARRIED OUT: Information Only
SAFETY NOTICE: Instructions in Service Bulletins assume that the engineer has a sound knowledge of safety procedures and
has been trained in the maintenance and repair of JCB products. If you are unsure or do not understand information contained in
this or other bulletins, ask your supervisor or contact JCB Service for advice. REMEMBER SAFETY MUST COME FIRST.
Copyright © 2004 JCB SERVICE. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any other
means, electronic, mechanical, photocopying or otherwise, without prior permission from JCB SERVICE.
This communication and the information within is intended for the recipient only, for information purposes, is confidential and may not be communicated to any third party.
Whilst the information is believed to be correct, no guarantee is given by JCB as to it’s accuracy and it’s use may not be attributed to JCB. This bulletin is issued for
information only and does not constitute an instruction to carry out warranty repairs on JCB products.
Introduction
JCB introduces an upgraded version of Backhoe
loader variant machines. These variants have latest
hydraulic systems, Power Management System
(3DX Xtra only), servo (on demand), air-conditioning
(on demand ) and high dump / maximum dig depth.
Figure 1.
The main features are listed below.
1 JCB Engines
• Aluminium radiator
2 High flow hydraulic pumps
3 PMS (Power Management System) controlled
3DX Xtra Hydraulic system
• Solenoid (Auto) dump in P2 Flow
• Pump pressure sensor- P1 Line
• Accelerator pedal position sensor
4 Hydro control valve blocks
• Loader valve block
a P2 Dump valve
b P2 Pressure maintenance valve
c MRV (Main Relief Valve)
• Excavator Control
a Hydro clamp valve
b Servo pressure valve (Servo
machine only)
5 In the servo machine: The excavator valve
spools (Boom, Dipper, Bucket and Slew) are
operated by the servo system. Manual control
for loader and stabilizers.
6 In standard machine: Manual operated EVB
(Excavator Valve Block) and LVB (Loader Valve
Block) like standard 3DX machine.
7 Independent steering system in all variants
8 In air conditioning machine, the air flow vents
are given in the cab roof for changing air flow
direction.
9 Auto engine OFF system
10 Servo safety system
Machine Identification
Table 1.
HAR 3DX S S L 1 2 3 4 5 6 7 8
Table 2.
Parameter Description
HAR World manufacturer's identifica-
tion
3DXSS Machine model
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