Part of the JCB Repair Manuals.
All 1,255 pages of this JCB 446, 456 Wheeled Loading Shovel service manual PDF (OEM #9803/4180-11) are built for one machine family: the 446 and 456 Wheeled Loading Shovel. Inside: complete hydraulic schematics for every circuit variant, from the early dual-pump 446 and 456 through the later tandem-pump configuration, plus wiring diagrams tracing every harness route from fuse block to diagnostic connector. You also get service schedules with calendar equivalents, fluid capacity tables, a full error codes section, and step-by-step procedures covering axles, WG 200 powershift transmission, brakes, and steering. Fill the hydraulic system to 215 litres, then torque your 7/8-14 SAE connections to 130-140 Nm. That's factory data, not a forum estimate. Your machine is down and parts quotes are rolling in. Download once, search by keyword, and pull up any spec or schematic right on your tablet at the machine.
Complete the set for your 446 & 456
- Operator Manual: JCB 426E, 434S, 436E, 456E Wheeled Loader Operator Manual
- Operator Manual: JCB 446, 456 Wheeled Loader Operator Manual
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | 3-39 | Introduction (Machine Model and Serial Number, Using the Service Manual, Section Numbering, Left Side, Right Side, Cross References, Identifying Your Machine, Machine Identification Plate, Typical Vehicle Identification Number, Typical Product Identification Number, Component Identification Plates) |
| Care and Safety | 40-59 | Safety Notices (Important Information, Operator Manual, Safety Warnings), Safety Check List (Safety - Yours and Others, Operating Safety, Maintenance Safety) |
| Routine Maintenance | 60-176 | Service Requirements (Introduction, Owner/Operator Support, Service/Maintenance Agreements, Initial Service and Inspection, Fit for Purpose Tests for Lifting Equipment, Obtaining Replacement Parts) |
| Attachments | 177-190 | Optional Attachments (Connecting/Disconnecting Hydraulic Hoses, Introduction, Connecting the Hydraulic Hoses, Disconnecting the Hydraulic Hoses, Quick Release Couplings) |
| Body and Framework | 191-344 | Technical Data (Air Conditioning Option), Basic Operation (Air Conditioning, R134a Refrigerant, System Operation, System Control, Safety Procedures) |
| Electrics | 345-716 | Technical Data (Electrical Data, General, Bulbs, Fuses and Relays to 539228, Fuses, Relays, Fuses and Relays From 540013, 539229, Primary Fuses, Diagnostic Connectors, Fuses and Relays From 540107, 539486, Fuses and Relays From 1169000, 1181000, Fuses and Relays, Fuses and Relays 456e From 1304000) |
| Hydraulics | 717-918 | Technical Data (Dual Pump, Primary Pump, Secondary Pump, Loader Valve, Pump, Tandem Pump, Auxiliary Relief Valves, From 1169000 Tandem Pump, Pumps, From 1169129, 446 From 1181004) |
| Transmission | 919-1156 | Technical Data (Axles 456, Unit Identification, Axles, Axles 446) |
| Brakes | 1157-1196 | Technical Data (and 456), Schematic Diagrams (Brake Circuit 456 to 539249, Brake Circuit) |
| Steering | 1197-1235 | Technical Data (Pump), Descriptions (General, Steering Valve - Operation, Emergency Steering - Operation) |
| Engine | 1236-1255 | Technical Data (456, 456E), Troubleshooting (Possible Faults), Cummins Engine and Transmission (Removal and Installation, Removal, Installation), Sump Drain Plug (Components) |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| UNF Grade 'S' Fasteners (1/4 in bolt, Condition 1) | 11.2 Nm | p. 13 |
| Metric Grade 8.8 Fasteners (M5 bolt, Condition 1) | 5.8 Nm | p. 13 |
| Hydraulic System Capacity | 215 litres | p. 82 |
| Wheel Nut Torque | 600 Nm | p. 173 |
| Compressor Belt Slack | 5 mm | p. 116 |
| 456 from 1239000 | ||
| Engine Oil Capacity | 18.9 litres | p. 84 |
| 446 from 540000, 456 to 1169000 | ||
| Gearbox Oil Capacity | 28 litres | p. 82 |
| Fuel System Capacity | 325 litres | p. 82 |
| 456 from 1169000, 446 from 1181000 | ||
| Cooling System Capacity | 40 litres | p. 83 |
| 446 and 456 Models to 1169000 | ||
| ROPS/FOPS Mounting Bolts Torque (446 and 456 Models to 1169000) | 330 Nm | p. 99 |
| 456 Models from 1169000 | ||
| ROPS/FOPS Mounting Bolts Torque, 456 Models from 1169000 | 270 Nm | p. 99 |
| 446 (Before 1181000) and 456 (Before 1169000), 446 (From 1181000) | ||
| Engine Valve Clearance (cold) - Inlet | 0.30mm | p. 1240 |
