Part of the JCB Operator Manuals.
Need the factory operating and maintenance schedules for your JCB power plant? This 148-page JCB Ecomax Engine T4i (68-129kw), JCB Ecomax Engine T4 (55kw), JCB 444, JCB 448 Operator Manual PDF (OEM #9821/2950) details every daily check, fluid capacity, and routine service procedure required to run these engines right. Inside, you get a complete fault-finding section covering limp home mode and reduced torque diagnostics, plus detailed maintenance interval charts. Open to exact factory instructions for bleeding the fuel system, adjusting valve clearances, and replacing the Front End Accessory Drive belt. Set your cold valve clearance to 0.15-0.20 mm on the inlet side, and swap that outer air cleaner element right at the 1000-hour mark. A neglected engine costs you serious downtime. Download this bookmarked file, pull it up on your phone in the field, and keep your equipment running strong.
What's Inside This JCB JCB ECOMAX ENGINE T4I (68-129KW), ECOMAX ENGINE T4 (55KW), 444, 448 Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| Care and Safety | 7-18 | Important Information (Operator Manual, Safety Warnings, Safety Yours and Others), Checklists (Common Rail Specific, Introduction, Operating Safety, Maintenance Safety) |
| General Information | 19-22 | Introduction, Product Compliance, Using This Manual, Left Side, Right Side, Units of Measurement, Machine / Equipment Related Data, Acronyms and Abbreviations |
| Identifying the Engine | 23-36 | Engine Identification Plate, Typical Engine Identification Number, Component Labels, Engine Component Identification (External, Independent Power Unit Component Identification) |
| Operating Procedures | 37-42 | Starting the Engine (Pre-Start Notes, Start Procedure, Engine Checks After Start-Up), Engine Running-In Procedure, Stopping the Engine |
| Lubricants and Capacities | 43-50 | Engine Lubricating Oil (Recommended Oils, Engine Oil Capacity), Coolant Mixtures, Coolant, Fuel (Fuels) |
| Routine Maintenance | 51-76 | Introduction, Cleaning the Engine, Lubricants - Health and Safety (Hygiene, Storage, Waste Disposal, Handling, First Aid - Oil, Spillage, Fires), Service Schedules |
| Fault Finding | 77-104 | Introduction, Fault Codes, Reduced Torque Mode, Limp Home Mode, Engine Shutdown, Component Replacement, Fault Finding Charts |
| Storage and Preservation | 105-108 | Storage, Preservation, Capping Engine Openings, Hot Test Description |
| Technical Data | 109-148 | Basic Engine Data, Engine Block & Bedplate Data, Cylinder Head Data, Inlet and Exhaust Valve Data, Rocker Levers, Rocker Shaft and Tappets Data, Pistons and Connecting Rods Data |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Injector clamp nuts torque | Not specified for user maintenance; contact JCB Dealer | p. 139 |
| Air Cleaner Outer Element replacement interval | 1000 Hr | p. 56 |
| Air Cleaner Inner Element replacement interval | 2000 Hr | p. 56 |
| Fuel Filter (machine mounted) replacement interval | 500 Hr | p. 56 |
| Fuel Filter (engine mounted) replacement interval | 1000 Hr | p. 56 |
| All Hoses condition check interval | 500 Hr | p. 56 |
| Oil drain plug 'O' ring replacement | Renew with new 'O' ring | p. 58 |
| Oil drain plug torque | 40 - 60 Nm (30 - 44 lbf ft) | p. 58 |
| JCB 444 | ||
| Valve clearance (measured cold) - Inlet | 0.15 to 0.20 mm (0.006 to 0.008 in) | p. 109 |
| Valve clearance (measured cold) - Exhaust | 0.43 to 0.50 mm (0.017 to 0.020 in) | p. 109 |
| Coolant Temperature Sender tightening torque | 22 Nm max (16 lb ft) | p. 115 |
| JCB 448 | ||
| Coolant Temperature Sender tightening torque | 22 Nm max (16 lb ft) | p. 129 |
