David Brown 990, 1200 Selectamatic 4-Cylinder Diesel Engine Repair Manual

Name: David Brown 990, 1200 Selectamatic 4-Cylinder Diesel Engine Repair Manual
Author: David Brown

$19.99

Type: Tractors

Serial: 700001 onward (1200 models) | 800001 onward (990 models)

48 Pages·16 MB·Searchable PDF·English·Print-Ready

✓ Torque Specs
✓ Bookmarks

Same factory service manual used by authorized dealer technicians.

Preview Sample Pages (PDF)

Need the factory rebuild procedures for your David Brown 990 or 1200 Selectamatic? This 48-page repair manual (OEM #9-37121) covers the 1200 Selectamatic Livedrive and Non-Livedrive, 990 Selectamatic Livedrive and Non-Livedrive, and 990 Non-Livedrive Twin-plate clutch tractors. Inside: valve clearance adjustments and cylinder head removal, a complete decarbonising sequence, piston and connecting rod service, camshaft replacement, fuel injection pump timing and controls, and water pump rebuild from bearing to impeller. You also get exploded views of every engine component in position, system diagrams for timing gear assembly, and injector nozzle testing procedures from atomisation checks through needle valve cleaning. Cylinder head nuts torque to 90 lb ft, engine oil capacity is 7.4 litres, and the cooling system takes 13.6 litres. Chasing an injection fault without the factory numbers is a money pit. Bookmarked by section so you jump straight to injection pump timing or camshaft clearances. Download it, open on your tablet, and start wrenching.

What's Inside This David Brown 990, 1200 Selectamatic Repair Manual

System	Pages	Key Topics
Maintenance	5-6	Engine Oil, Air Cleaner, Cooling System, Sediment Bowl, Fuel Filter, Fan Belt
Adjusting Valve Clearance	8	Valve Clearance, Rocker Arm, Valve Stem, Adjusting Screw, Locknut
Removing and Replacing Cylinder Head	8	Cooling Water, Air Inlet Pipe, Manifolds, Valve Rocker Cover, Rocker Shaft, Push Rods, Cylinder Head Nuts, Gasket
Decarbonising Cylinder Head	9-13	Cylinder Head, Valves, Injectors, Valve Seats, Valve Guides, Piston Rings
Pistons and Connecting Rods	14	Pistons, Connecting Rods, Piston Rings, Gudgeon Pins, Connecting Rod Alignment
Camshaft	15-16	Locating-Plate, Camshaft Gear, Valve Rockers, Tappets, Camshaft Bearings
Injectors	17-19	Injector Removal, Nozzle Testing, Atomisation Test, Nozzle Cleaning, Needle Valve, Nozzle Body
Fuel Feed Pump	20	Fuel Pipe Union, Push-Rod, Diaphragm, Pull-Rod, Priming Lever
Fuel Filter	20	First Filter Element, Second Filter Element, Bowl, Retaining Bolt, Sealing Ring
Venting Fuel System	21-22	Fuel-Feed-Pump Outlet Union, Hand Primer, Filter Vent Plug, Injection Pump Vent Plug, Injector Unions
Fuel Injection Pump	23-25	Injection Pump Removal, Pump Replacement, Pump Timing, Injection Pump Controls, Injection Pump Fuel Setting, Checking Engine Spill Timing
Fuel Tank	26-27	Fuel Tank Removal, Instrument Panel, Engine-Speed-Indicator Drive Cable, Fuel Outlet Pipe, Fuel Leak-Off Pipes
Lubricating Oil Filter	28	Filter Bowl, Filter Element, By-Pass Valve, Sealing Ring, Securing Bolt
Lubricating Oil Pump	28-30	Pump Removal, Oil Pump Screen, Pump Dismantling, Pump Replacement, Pump Bracket Bush, Relief Valve
Air Cleaner	31	Cleaner Bowl, Wire Mesh Element, Oil Bath, Pre-Cleaner, Rubber Ring, Inlet Pipe
Timing Cover	31	Timing Cover Removal, Timing Cover Refitting, Oil Seal Replacement, Crankshaft Pulley
Timing Gears	32-34	Camshaft Gear, Intermediate Gear, Injection Pump Drive Gear, Crankshaft Gear, Assembling Timing Gears
Water Pump	35-39	Water Pump Gland, Water Pump Bearing, Pulley, Impeller, By-Pass Seal
Dimensional Data	40-43	Torque Figures, Capacities, Wear Limits, Valve Clearance, Crankshaft, Piston Dimensions
Summary of Design Changes	44-48	Rear Main Bearing Oil Retainer, High-Lift Camshaft, Valves, Pistons, Injection Pump Drive Gear, Timing Cover, Engine Oil Filler, Radiator Core

Quick Reference Specifications

Specification	Value	Page
All Models
Clutch housing to main frame bolts torque	75 lb ft (10.5 kg metres)	p. 40
Engine lubricating oil filter replacement interval	Every 250 Hours	p. 5
Engine Oil Capacity	7.4 litres	p. 40
Cooling System Capacity	13.6 litres	p. 40
Cylinder Head Nuts and Bolts Torque	90 lb ft	p. 40
Main Bearing Cap Bolts Torque	160 lb ft	p. 40
Inlet Valve Clearance (set cold)	0.010 in	p. 41
Exhaust Valve Clearance with stem end caps (set cold)	0.007 in	p. 41
Injector Setting Pressure	175 atmospheres	p. 43
Oil Filter Bowl Bolt Torque	10 lb ft	p. 40
1200 (4/55)
Spill Timing (static) for 1200 (4/55)	25° before top dead centre	p. 43
990 (4/49)
Spill Timing (static) for 990 (4/49)	17° before top dead centre	p. 43

Brand	David Brown
Model	1200 Selectamatic Livedrive, 1200 Selectamatic Non-Livedrive, 990 Selectamatic Livedrive, 990 Selectamatic Non-Livedrive, 990 Non-Livedrive (Twin-plate clutch), 1200 Selectamatic, 990 Selectamatic
Machine Type	Tractors
Manual Type	Repair Manual
Language	English
Format	Searchable PDF (Digital Download)
Pages	48
File Size	16 MB
Manual No.	9-37121
Serial Range	700001 onward (1200 models), 800001 onward (990 models)
Wiring Diagrams	No
Hydraulic Schematics	No
Torque Specifications	Yes
Bookmarked / Indexed	Yes

David Brown 990, 1200 Selectamatic 4-Cylinder Diesel Engine Repair Manual

What's Inside This David Brown 990, 1200 Selectamatic Repair Manual

Quick Reference Specifications

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