All 48 pages of this David Brown 3800 and 4600 Selectamatic Livedrive Repair Manual (OEM #TP 665) focus on the 3-cylinder gasoline engines powering both tractors from 1968 to 1970. Inside: a full maintenance section covering valve clearance, spark plug service, and carburettor procedures, plus a troubleshooting section to trace ignition and fuel faults before you pull anything apart. You get step-by-step disassembly of pistons and connecting rods, crankshaft and bearings, timing gears, and the governor, with exploded views throughout and a dimensional data section packed with tightening torques, wear limits, and valve stem diameters. Before buttoning up, confirm the oil warning light switch opens between 9 and 13 lb/sq in; no adjustment is possible, so replace it if it doesn't. Your machine sat long enough. Bookmarked by section, open it on your tablet and jump straight to the spec you need.
What's Inside This David Brown 3800 Selectamatic Livedrive, 4600 Selectamatic Livedrive, 3-Cylinder Gasoline Engines Repair Manual
| System | Pages | Key Topics |
|---|
| Maintenance | 6-9 | Engine Oil, Air Cleaner, Fuel Feed Pump Sediment Bowl, Distributor, Spark Plugs, Valve Clearance |
| Fuel System | 10-16 | The Carburetter |
| Ignition System | 17-19 | Distributor |
| Lubrication System | 20-23 | Oil Pump, Relief Valve, Oil Filter, Camshaft Oilways, Crankshaft Oil Passage |
| Cooling System | 24-39 | Engine Tune, Decarbonising, Pistons and Connecting Rods, Crankshaft and Bearings, Timing Gears, Governor, Engine Removal |
| Dimensional Data | 40-44 | Engine Details, Tightening Torques, Capacities, Wear Limits, Valve Stem Diameters, Crankshaft |
| Summary of Design Changes | 45 | Governor Housing Cover Adjustable Stop, Cylinder Block Core Plugs, Piston Compression Ratio, Carburetter Jet Sizes, Throttle Linkage, Main Bearings and Thrust Washers |
| Approved Lubricants | 46-48 | Engine and Air Cleaner, Transmission and Hydraulic System, Belt Pulley and Steering Box, Power-Assisted Steering, Final Drive Reductions, King Pin and Front Trunnion (Pivot) |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| Oil warning light switch opening pressure | 9 to 13 lb/sq in | p. 21 |
