All 48 pages of this David Brown AD4/47 Repair Manual (OEM #TP 644) target the engine shared by the 990 Implematic Livedrive, 990 Selectamatic Livedrive, 990 Implematic Non-Livedrive, 990 Selectamatic Non-Livedrive, and 990 Industrial Models, across the AD4/47A, AD4/47B, and ID4/47 variants. Inside you get a complete fuel system chapter covering injector servicing, injection pump work, and fuel tank removal; a full lubrication section with oil pump teardown and relief valve specs; plus crankshaft regrinding, cylinder sleeve dimensions, timing gear alignment, and valve mechanism procedures. Exploded views, system diagrams, and a full dimensional data section round it out with torque figures, wear limits, piston measurements, and fluid capacities. Set intake valve clearance to 0.015 in (0.35 mm) on engines through AD4/47A serial 60389, or drop to 0.010 in (0.25 mm) on later builds. Your machine is down. Bookmarked by section and keyword-searchable; pull it up on any device and get to the right spec fast.
What's Inside This David Brown AD4/47 Repair Manual
| System | Pages | Key Topics |
|---|
| Maintenance | 5-8 | Air Cleaner, Engine Breather, Valve Clearance, Fan Belt, Fuel Filter, Water Pump |
| Fuel System | 9-15 | Venting the System, Fuel Feed Pump, Injector Servicing, Injection Pump, Fuel Filters, Fuel Tank Removal |
| Lubrication System | 16-19 | Engine Lubrication, Oil Warning Light, Oil Pump, Dismantle Pump, Oil Pump Bracket Bush, Relief Valve |
| Pistons and Connecting Rods | 21-22 | Removing Pistons, Gudgeon Pins, Connecting Rods, Piston Rings |
| Crankshaft and Bearings | 23 | Crankshaft Regrinding, Crankshaft Rear Oil Seal, Main Journal Diameter, Big-End Journal Diameter, Thrust Washer Thickness |
| Cylinder Sleeves | 24 | Removing Sleeves, Rubber Sealing Rings, Sleeve Protrusion, Sleeve Dimensions |
| Timing Gears | 25-26 | Timing Gear Cover, Camshaft Gear Bolt, Intermediate Gear Shaft, Injection Pump Drive Gear, Timing Gear Markings |
| Valve Mechanism | 27 | Camshaft, Valve Rockers, Valve Clearance, Valve Springs, Valve Stem Diameters, Valve Timing |
| Engine Removal | 27-31 | Method 'a', Non-Livedrive Models, Livedrive Models - Six-Speed, Livedrive Models - Twelve-Speed, Method 'b' |
| Dimensional Data | 32-36 | Torque Figures, Capacities, Wear Limits, Piston Dimensions, Valve Clearance, Crankshaft |
| Summary of Design Changes | 37-38 | Crankshaft Components, Valve Train Components, Fuel Injection System Components, Cooling System Components, Electrical System Components, Engine Covers and Gaskets |
| Approved Lubricants and Test Oils | 39-48 | Engine Oil Classification, Sae Viscosity Grading, Api Classification, Service Classifications, Fuel, Grease and Anti-Freeze, Fuel Injection Equipment Test Oils |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| AD4/47A (to serial 60389), AD4/47B (to serial 40724) |
| Valve Clearance (set cold) - Inlet (to AD4/47A serial 60389) | 0.015 in (0.35 mm) | p. 33 |
| Valve Clearance (set cold) - Exhaust (to AD4/47A serial 60389) | 0.012 in (0.30 mm) | p. 33 |
| All Models |
| Intermediate gear end-float | 0.002-0.004 in (0.05-0.010 mm) | p. 29 |
| Camshaft end-float | 0.010-0.020 in (0.254-0.508 mm) | p. 36 |
| Cylinder sleeve protrusion above block face | 0.002-0.005 in (0.05-0.13 mm) | p. 29 |
| Sleeve Bore (new) | 3.655-3.6250 in (92.088-92.076 mm) | p. 37 |
| Cylinder head nuts and bolts torque (final stage) | 90 lb ft (12.5 kg metres) | p. 25 |
| Main bearing cap bolts torque | 140 lb ft | p. 36 |
| Cooling system capacity | 3 gal | p. 36 |
| Engine lubricating oil capacity | 13 pints | p. 36 |
| AD4/47A (from serial 60390), AD4/47B (from serial 40725) |
| Valve Clearance (set cold) - Inlet (from AD4/47A serial 60390) | 0.010 in (0.25 mm) | p. 33 |
| Valve Clearance (set cold) - Exhaust (from AD4/47A serial 60390) | 0.007 in (0.18 mm) | p. 33 |
