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SERVICE MANUAL
ENGINE
JCB T4F 444 (55kw) Engine (4 Cyl),
JCB T4i 444 Elec Engine (4 Cyl),
JCB T4i 448 Elec Engine (4 Cyl)
EN - 9806/4300 - ISSUE 5 - 09/2018
This manual contains original instructions, verified by
the manufacturer (or their authorized representative).
Copyright 2017 © 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.
www.jcb.com
Foreword
The Operator's Manual
You and others can be killed or seriously injured
if you operate or maintain the machine without
first studying the Operator's Manual. You must
understand and follow the instructions in the
Operator's Manual. If you do not understand
anything, ask your employer or JCB dealer to
explain it.
Do not operate the machine without an Operator's
Manual, or if there is anything on the machine you
do not understand.
Treat the Operator's Manual as part of the machine.
Keep it clean and in good condition. Replace the
Operator's Manual immediately if it is lost, damaged
or becomes unreadable.
Contents
01 - Machine
06 - Body and Framework
09 - Operator Station
15 - Engine
18 - Fuel and Exhaust System
21 - Cooling System
33 - Electrical System
72 - Fasteners and Fixings
75 - Consumable Products
78 - After Sales

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Table of Contents
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Do you have a question about the T4F 444 and is the answer not in the manual?

Questions and answers

Cameron Bartlett
March 11, 2025

How to get spill off caps off injector /rocker cover

1 comments:
Mr. Anderson
May 14, 2025

To remove the spill off (fuel bleed off) pipes from the injector or rocker cover on the JCB T4F 444:

1. Make sure the engine is safe to work on and has cooled down.
2. Get access to the engine.
3. Remove the high-pressure fuel pipes (refer to Fuel Pipes PIL 18-96).
4. Remove the fuel bleed off pipes (spill off pipes) (refer to Fuel Pipes PIL 18-96).
5. Disconnect electrical connectors at the fuel injectors and coolant temperature sensor.
6. Move the electrical harness away from the rocker cover.
7. Proceed with other disassembly steps as needed.

The fuel bleed off pipes are removed as part of the rocker cover removal process.

This answer is automatically generated

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Summary of Contents for jcb T4F 444

  • Page 1 Operator's Manual. You must understand and follow the instructions in the Operator's Manual. If you do not understand anything, ask your employer or JCB dealer to explain it. SERVICE MANUAL Do not operate the machine without an Operator's Manual, or if there is anything on the machine you do not understand.
  • Page 2 Notes: 9806/4300-5 Find manuals at https://best-manuals.com...
  • Page 3 SERVICE MANUAL SERVICE MANUAL Volume 1 Volume 2 JCB T4F 444 (55kw) Engine (4 Cyl), JCB T4F 444 (55kw) Engine (4 Cyl), JCB T4i 444 Elec Engine (4 Cyl), JCB T4i 444 Elec Engine (4 Cyl), JCB T4i 448 Elec Engine (4 Cyl)
  • Page 4 Notes: 9806/4300-5 Find manuals at https://best-manuals.com...
  • Page 5: Table Of Contents

    01 - Machine Contents Page No. 01-00 Introduction 01-00-00 General ..........................01-3 01-00-04 Product Compliance ......................01-4 01-00-06 Intended Use ........................01-5 01-03 Safety 01-03-03 Safety - Yours and Others ....................01-7 01-03-06 Safety Warnings ....................... 01-8 01-03-09 General Safety .........................
  • Page 6 Notes: 9806/4300-5 2018-07-24 Find manuals at https://best-manuals.com...
  • Page 7 01 - Machine 00 - Introduction 00 - Introduction Contents Page No. 01-00-00 General ..........................01-3 01-00-04 Product Compliance ......................01-4 01-00-06 Intended Use ........................01-5 01 - 1 9806/4300-5 01 - 1 Find manuals at https://best-manuals.com...
  • Page 8 Notes: 01 - 2 9806/4300-5 01 - 2 Find manuals at https://best-manuals.com...
  • Page 9: Machine

    Use this part of the manual to identify each control lever, switch, gauge, button and pedal. Do not guess, if there is anything you do not understand, ask your JCB dealer. 01 - 3 9806/4300-5 01 - 3...
  • Page 10: Product Compliance

    For advice consult your JCB dealer. For its compliance as a new product, your JCB and some of its components may bear approval numbers and marking's, and may have been supplied with a Declaration/Certificate of Conformity.
  • Page 11: Intended Use

    The scope of this publication is limited to the engine, but references to typical applications may be made. When the JCB engine is used as power source for pumps, generators and independent power source for pumps, generators, independent power units...
  • Page 12: Safety

    01 - Machine 03 - Safety 03 - Safety Contents Page No. 01-03-03 Safety - Yours and Others ....................01-7 01-03-06 Safety Warnings ....................... 01-8 01-03-09 General Safety ......................... 01-9 01-03-12 Maintenance Safety ....................... 01-10 01-03-18 Operating Safety ......................01-11 01-03-21 Worksite Safety ......................
  • Page 13: Safety - Yours And Others

    They inform you of potential hazards and how to avoid them. If you do not fully understand the warning messages, ask your employer or JCB dealer to explain them. Safety is not just a matter of responding to the warnings.
  • Page 14: Safety Warnings

    01 - Machine 03 - Safety 06 - Safety Warnings 06 - Safety Warnings Introduction In this manual there are safety notices. Each notice starts with a signal word. The signal word meanings are given below. The signal word 'DANGER' indicates a hazardous situation which, if not avoided, will result in death or serious injury.
  • Page 15: General Safety

    Keep long hair restrained. Remove altered in any way which could affect or invalidate its rings, watches and personal jewellery. compliance. For advice consult your JCB dealer. Alcohol and Drugs It is extremely dangerous to operate machinery when under the influence of alcohol or drugs.
  • Page 16: Maintenance Safety

    01 - Machine 03 - Safety 12 - Maintenance Safety 12 - Maintenance Safety lubricants. Used fluids and/or lubricants, filters and contaminated materials must be disposed of in accordance with local regulations. Use authorised Introduction waste disposal sites. Hot Components Touching hot surfaces can burn skin.
  • Page 17: Operating Safety

    Do not use the machine in a potentially explosive atmosphere, i.e. combustible vapours, gas or dust, without first consulting your JCB dealer. Regulations Obey all laws, worksite and local regulations which affect you and your machine.
  • Page 18: Worksite Safety

    01 - Machine 03 - Safety 21 - Worksite Safety 21 - Worksite Safety An applicable worksite organisation is required in order to minimise hazards that are caused by restricted visibility. The worksite organisation is a Introduction collection of rules and procedures that coordinates the machines and people that work together in WARNING You or others can be killed or seriously the same area.
  • Page 19: Risk Assessment

    If you are unsure of the suitability of the machine for • Are any other machines or persons likely to be a specific task, contact your JCB dealer who will be in or to enter the area while operations are in pleased to advise you.
  • Page 20 01 - Machine 06 - About this Manual 06 - About this Manual Contents Page No. 01-06-00 General ........................... 01-15 01 - 14 9806/4300-5 01 - 14...
  • Page 21 06 - About this Manual 00 - General 00 - General Introduction This publication is designed for the benefit of JCB Distributor Service Engineers who are receiving, or have received, training by JCB Technical Training Department. These personnel should have a sound knowledge of...
  • Page 22 01 - Machine 09 - Description 09 - Description Contents Page No. 01-09-00 General ........................... 01-17 01 - 16 9806/4300-5 01 - 16...
  • Page 23 09 - Description 00 - General 00 - General Introduction The JCB Engine can be installed to a variety of construction, agricultural and other machines and equipment. The scope of this publication is limited to the engine, but references to a typical installation will be made.
  • Page 24 01 - Machine 12 - Operation 12 - Operation Contents Page No. 01-12-00 General ........................... 01-19 01 - 18 9806/4300-5 01 - 18...
  • Page 25 12 - Operation 00 - General 00 - General Introduction (For: JCB T4i Elec Engine (4 Cyl)) Notice: Do not keep the accelerator pedal fully depressed when the engine has started. Do not race the engine until the oil pressure low light has gone out.
  • Page 26 Notes: 01 - 20 9806/4300-5 01 - 20...
  • Page 27 06 - Body and Framework Contents Page No. 06-63 Identification Label 06-63-06 Engine ..........................06-3 9806/4300-5 2017-10-18...
  • Page 28 Notes: 9806/4300-5 2017-10-18...
  • Page 29 06 - Body and Framework 63 - Identification Label 63 - Identification Label Contents Page No. 06-63-06 Engine ..........................06-3 06 - 1 9806/4300-5 06 - 1...
  • Page 30 Notes: 06 - 2 9806/4300-5 06 - 2...
  • Page 31 06 - Body and Framework 63 - Identification Label 06 - Engine 06 - Engine Introduction The engine data labels are attached to the cylinder block as shown. Figure 2. A Engine data label - rocker cover B Engine identification number C Stamp The data label includes the engine identification number.
  • Page 32 06 - Body and Framework 63 - Identification Label 06 - Engine Digit 1-2 Engine Type 4.4L turbocharged and aftercooled mechanical fuel injection (Tier 3) 4.4L turbocharged and aftercooled electronic common rail fuel injection (Tier 4i) 4.4L turbocharged and aftercooled electronic common rail fuel injection (Tier 4F) 4.4L turbocharged and aftercooled electronic common rail fuel injection (Tier 4F 55kw) Table 3.
  • Page 33 09 - Operator Station Contents Page No. 09-33 Safety Label/Chart 09-33-00 General ..........................09-3 9806/4300-5 2014-08-22...
  • Page 34 Notes: 9806/4300-5 2014-08-22...
  • Page 35 09 - Operator Station 33 - Safety Label/Chart 33 - Safety Label/Chart Contents Page No. 09-33-00 General ..........................09-3 09 - 1 9806/4300-5 09 - 1...
  • Page 36 Notes: 09 - 2 9806/4300-5 09 - 2...
  • Page 37 Each safety label has a part number printed on it, use this number to order a new safety label from your JCB dealer. 09 - 3 9806/4300-5 09 - 3...
  • Page 38 Notes: 09 - 4 9806/4300-5 09 - 4...
  • Page 39 15 - Engine Contents Page No. Acronyms Glossary ............................ 15-3 15-00 Engine 15-00-00 General ..........................15-3 15-03 Crankcase 15-03-00 General ........................... 15-39 15-06 Cylinder Head 15-06-00 General ........................... 15-43 15-09 Bedplate 15-09-00 General ........................... 15-51 15-12 Crankshaft 15-12-00 General ........................... 15-59 15-12-03 Main Bearing ........................
  • Page 40 15-42-21 Tappet ........................... 15-164 15-42-24 Tappet Cover ........................ 15-166 15-45 Oil Sump 15-45-00 General ......................... 15-169 15-51 Timing Gear 15-51-00 General ......................... 15-175 15-51-03 Crankshaft Gear ......................15-178 15-51-06 Camshaft Gear ......................15-181 15-51-09 Fuel Injection Pump Gear .................... 15-182 15-51-15 Heavy Duty PTO Gear ....................
  • Page 41 This as a preview PDF file from best-manuals.com Download full PDF manual at best-manuals.com...

This manual is also suitable for:

T4i 444T4i 448

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