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jcb 672 Service Manual

Mechanical engine

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SERVICE MANUAL
JCB 672 Mechanical Engine
EN - 9806/6900 - ISSUE 3 - 2016-08-22
This manual contains original instructions, verified by
the manufacturer (or their authorized representative).
Copyright 6-08-22 © 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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Summary of Contents for jcb 672

  • 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: Table Of Contents

    15 - Engine 00 - General 00 - General 00 - General Introduction Introduction ............15-3 Basic Description Health and Safety ........... 15-7 Technical Data ..........15-8 The 6 cylinder mechanical engine has fuel ignited by compression ignition (C.I.). The engine operates on Component Identification .........
  • Page 3 15 - Engine 00 - General 00 - General Figure 3. 1 Flywheel 2 Crankshaft 3 Camshaft 4 Inlet valves (12 off) 5 Exhaust valves (12 off) 6 Push rods (12 off) 7 Turbocharger 8 Lubrication oil pump 15 - 4 9806/6900-3 15 - 4...
  • Page 4 15 - Engine 00 - General 00 - General Internal As viewed on the right hand side. Refer to Figure 4. The following identifies the main internal components of a typical engine assembly. Some variants may differ in detail. Figure 4. Rocker assembly Valve bridge piece (12 off) Valve bridge piece (12 off)
  • Page 5 15 - Engine 00 - General 00 - General 6a Piston ring - top compression (6 off) 6b Piston ring - 2nd compression (6 off) 6c Piston ring - oil control (6 off) 6d Gudgeon pin (6 off) 6d Gudgeon pin circlip (12 off) As viewed on the rear left side.
  • Page 6: Health And Safety

    15 - Engine 00 - General 00 - General Health and Safety accordance with local regulations. Use authorised waste disposal sites. Hot Components Touching hot surfaces can burn skin. The engine and machine components will be hot after the unit has been running.
  • Page 7: Technical Data

    15 - Engine 00 - General 00 - General Technical Data Table 5. Basic Engine Data (Dieselmax 672 Mechanical Engine) Engine EC - 6 Cylinder Mechanical, Turbocharged with Intercooler Emission compliance Non-emission Rated speed 1800 rpm Weight (Dry): 680 kg (1500 lb)
  • Page 8: Component Identification

    15 - Engine 00 - General 00 - General Component Identification 6 Cylinder Mechanical Engine The following identifies the main components of a typical engine assembly visible from the exterior. Some variants may differ in detail. Figure 6. Left hand Side A Lubrication oil dipstick B Fuel injectors and high pressure fuel pipes C Lubrication oil filler cap...
  • Page 9 15 - Engine 00 - General 00 - General J Fuel injection pump K High pressure fuel pipes L Lifting eye head Figure 7. Right hand side A Timing gear case B Flywheel housing C Bedplate housing D Lubrication oil sump E Turbocharger F Exhaust manifold G Alternator...
  • Page 10 15 - Engine 00 - General 00 - General Figure 8. Crankshaft pulley (front) end A Rocker cover B Cylinder head C Crankcase D Bedplate E Lubrication oil sump F Torsional vibration damper G FEAD (Front End Accessory Drive) tensioner H Starter motor J Alternator and drive pulley assembly K Twin thermostat...
  • Page 11 15 - Engine 00 - General 00 - General Figure 9. Flywheel (rear) end A Rocker cover B Cylinder head C Flywheel D Fuel injection pump gear access cover E Timing case F Inlet manifold G Turbocharger 15 - 12 9806/6900-3 15 - 12...
  • Page 12 15 - Engine 00 - General 00 - General Figure 10. 6 Cylinder mechanical engine (ISO) view A Inlet manifold B Oil cooler remote C FEAD belt tensioner D Torsional vibration damper E Coolant pump drive pulley F Lubrication oil sump G Oil drain plug (sump) H Starter motor assembly J Water inlet connector...
  • Page 13: Operation

    15 - Engine 00 - General 00 - General Operation The Four Stroke Cycle The stages in the four stroke cycle for each cylinder are as follows: This section describes the cycle sequence, for the 6 cylinders of the diesel engine. Table 6.
  • Page 14 15 - Engine 00 - General 00 - General Figure 11. 746030 Induction Compression stroke Power stroke Exhaust stroke Camshaft Camshaft lobe - Inlet valve operation Camshaft lobe - Exhaust valve operation BDC Bottom dead centre TDC TDC (Top Dead Centre) 15 - 15 9806/6900-3 15 - 15...
  • Page 15 Our support email: ebooklibonline@outlook.com...