JCB 426 436 446 Wheeled Loader Service Repair Workshop Manual

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. World Class Customer Support 9803-4160-16 Publication No. Issued by JCB Technical Publications, JCB Aftermarket Training, Woodseat, Rocester, Staffordshire, ST14 5BW, England. Tel +44 1889 591300 Fax +44 1889 591400 Service Manual Wheeled Loading Shovel - 426, 436, 446 Section 1 - General Information Section 2 - Care and Safety Section 3 - Routine Maintenance Section A - Attachments Section B - Body and Framework Section C - Electrics Section E - Hydraulics Section F - Transmission Section G - Brakes Section H - Hydraulic Steering Section K - Engine

Section i - Front Cover i - 0 i - 0 9803-4160-16 Notes:

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. World Class Customer Support 9803/4160-16 Publication No. Issued by JCB Technical Publications, JCB Service, World Parts Centre, Beamhurst, Uttoxeter, Staffordshire, ST14 5PA, England. Tel +44 1889 590312 Fax +44 1889 593377 Section 1 General Information Section 1 - General Information Section 2 - Care and Safety Section 3 - Routine Maintenance Section A - Attachments Section B - Body and Framework Section C - Electrics Section E - Hydraulics Section F - Transmission Section G - Brakes Section H - Hydraulic Steering Section K - Engine

Section 1 - General Information 1 - 0 1 - 0 9803/4160-16 Notes:

Page No. Contents Section 1 - General Information 1 - i 1 - i Introduction About this Manual .................................................................................... 1 - 1 Machine Model and Serial Number .................................................... 1 - 1 Using the Service Manual .................................................................. 1 - 1 Section Numbering ............................................................................. 1 - 1 Left Side, Right Side ........................................................................... 1 - 2 Cross References ............................................................................... 1 - 2 Identifying Your Machine ......................................................................... 1 - 3 Machine Identification Plate ............................................................... 1 - 3 Component Identification Plates ......................................................... 1 - 5 Standard Torque Settings Zinc Plated Fasteners and Dacromet Fasteners ..................................... 1 - 7 Introduction ......................................................................................... 1 - 7 Bolts and Screws ................................................................................ 1 - 7 Hydraulic Connections ........................................................................... 1 - 11 'O' Ring Face Seal System ............................................................... 1 - 11 'Torque Stop' Hose System .............................................................. 1 - 14 Service Tools Numerical List ........................................................................................ 1 - 15 Tool Detail Reference ............................................................................ 1 - 16 Section B - Body and Framework ..................................................... 1 - 16 Section C - Electrics ......................................................................... 1 - 20 Section E- Hydraulics ....................................................................... 1 - 22 Section F - Transmission .................................................................. 1 - 30 Section H - Steering ......................................................................... 1 - 33 Section K - Engine ............................................................................ 1 - 33 Service Consumables Sealing and Retaining Compounds ....................................................... 1 - 35 Terms and Definitions Colour Coding ........................................................................................ 1 - 37 Hydraulic Schematic Colour Codes .................................................. 1 - 37

Page No. Contents Section 1 - General Information 1 - ii 1 - ii

Section 1 - General Information 1 - 1 1 - 1 9803/4160-16 Introduction About this Manual Machine Model and Serial Number This manual provides information for the following model(s) in the JCB machine range: – 426 Wheeled Loading Shovel from machine serial number 531001 – 436 Wheeled Loading Shovel from machine serial number 533001 – 446 Wheeled Loading Shovel from machine serial number 540000 to 540011 Note: The information provided in this manual for the 436 machine also applies to the 446 machine, except where specified. Note: USA ONLY - For 426 machines built after November 1998, Hydraulic and Electrical Information is as for 436 machines. Also, machine serial numbers start at 544001. Note: USA ONLY - For 426 machines built after October 2000, Hydraulic and Electrical Information is as for 426 machines. Also, machine serial numbers revert to the normal 426 series. Using the Service Manual T11-004 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 workshop practice, safety procedures, and general techniques associated with the maintenance and repair of hydraulic earthmoving equipment. The illustrations in this publication are for guidance only. Where the machines differ, the text and/or the illustration will specify. General warnings in Section 2 are repeated throughout the manual, as well as specific warnings. Read all safety statements regularly, so you do not forget them. Renewal of oil seals, gaskets, etc., and any component showing obvious signs of wear or damage is expected as a matter of course. It is expected that components will be cleaned and lubricated where appropriate, and that any opened hose or pipe connections will be blanked to prevent excessive loss of hydraulic fluid and ingress of dirt. Where a torque setting is given as a single figure it may be varied by plus or minus 3%. Torque figures indicated are for dry threads, hence for lubricated threads may be reduced by one third. The manufacturer's policy is one of continuous improvement. The right to change the specification of the machine without notice is reserved. No responsibility will be accepted for discrepancies which may occur between specifications of the machine and the descriptions contained in this publication. Finally, please remember above all else safety must come first! Section Numbering T11-005 The manual is compiled in sections, the first three are numbered and contain information as follows: The remaining sections are alphabetically coded and deal with Dismantling, Overhaul etc. of specific components, for example: Section contents, technical data, circuit descriptions, operation descriptions etc. are inserted at the beginning of each alphabetically coded section. 1 General Information - includes torque settings and service tools. 2 Care and Safety - includes warnings and cautions pertinent to aspects of workshop procedures etc. 3 Maintenance - includes service schedules and recommended lubricants for all the machine. A Attachments B Body and Framework, etc.

Section 1 - General Information Introduction About this Manual 1 - 2 1 - 2 9803/4160-16 Left Side, Right Side In this manual, 'left' A and 'right' B mean your left and right when you are seated correctly in the machine. Fig 1. Cross References T1-004_2 In this publication, page cross references are made by presenting the subject title printed in bold, italic and underlined. It is preceeded by the 'go to' symbol. The number of the page upon which the subject begins, is indicated within the brackets. For example: K Cross References ( T 1-2) .

Section 1 - General Information Introduction Identifying Your Machine 1 - 3 1 - 3 9803/4160-16 Identifying Your Machine Machine Identification Plate Your machine has an identification plate mounted as shown. The serial numbers of the machine and its major units are stamped on the plate. Note: The machine model and build specification is indicated by the VIN (earlier machines) or PIN (later machines). Refer to Typical Vehicle Identification Number (VIN) or Typical Product Identification Number (PIN). The serial number of each major unit is also stamped on the unit itself. If a major unit is replaced by a new one, the serial number on the identification plate will be wrong. Either stamp the new number of the unit on the identification plate, or simply stamp out the old number. This will prevent the wrong unit number being quoted when replacement parts are ordered. The machine and engine serial numbers can help identify exactly the type of equipment you have. Fig 2. Typical Vehicle Identification Number 1 World Manufacturer Identification, SLP = JCB 2 Machine Model, 42600 = 426 3 Year of Manufacture S, (P = 1993, R = 1994, S = 1995, T = 1996, V = 1997, W = 1998, X = 1999, Y = 2000, 1 = 2001, 2 = 2002, 3 = 2003, 4 = 2004) 4 Manufacturing Location (E = England) 5 Machine Serial Number (0531001) The serial number of each major unit is also stamped on the unit itself. If a major unit is replaced by a new one, the serial number on the identification plate will be wrong. Either stamp the new number of the unit on the identification plate, or simply stamp out the old number. This will prevent the wrong unit number being quoted when replacement parts are ordered. The machine and engine serial numbers can help identify exactly the type of equipment you have. 1 2 3 4 5 SLP 42600 S E 0531001

Section 1 - General Information Introduction Identifying Your Machine 1 - 4 1 - 4 9803/4160-16 Typical Product Identification Number Fig 3. 1 World Manufacturer Identification (3 Digits) 2 Model Number (3 Digits) 3 Loader End Type (1 Digit) 4 Designation (1 Digit) 5 Check Letter (1 Digit) The Check Letter is used to verify the authenticity of the machine’s PIN. 6 Year of Manufacture (1 Digit) 7 Machine Serial Number (7 Digits) Each machine has a unique serial number. Note: On later models, the year of manufacture digit was removed and the machine serial number was increased to 8 digits. O = HT Loader End Z = ZX Loader End S = Farmmaster O = None Farmmaster I = India 7 = 2007 A = 2010 8 = 2008 B = 2011 9 = 2009 C = 2012

JCB 426 436 446 Wheeled Loader Service Repair Workshop Manual

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