All 166 pages of this 1690 Operator Manual put you in the seat with confidence: from day-one safety decals and hand signals through the complete Synchromesh Transmission operating sequence. Inside, a full instrument and controls section walks every warning lamp, pedal, and lever; the operating chapter covers the 4WD engagement, PTO reversible shaft, Jeffes linkage setup, and external hydraulics valve procedures for every job you will run. A structured maintenance chapter lays out six service intervals (10, 50, 100, 200, 400, and 800 hours), with fluid capacities, engine oil change steps, fuel filter service, and 4WD front axle maintenance. Set valve clearance at exactly 0.25 mm cold; confirm the 5.4-litre engine is holding 3.1 bar oil pressure before you pull out of the yard.
What's Inside This David Brown 1690 Turbo -4WD, 1690 Turbo -4WD Synchromesh Transmission Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| To the Owner | 7-8 | 1690 Turbo Tractor, Four Wheel Drive, Synchromesh Transmission |
| Safety | 9-15 | - |
| Hand Signals | 16-17 | Start the Engine, Stop the Engine, Move Out, Raise Equipment, Lower Equipment, Stop |
| Decals | 18-23 | Rotating Fan and Belts, Transmission, PTO Shaft, Drawbar, 3 Point Hitch, Dual Speed P.T.O., Clutch & Brake Fluid Reservoirs |
| Tractor Serial Numbers | 24-25 | Tractor Serial Number, Engine Serial Number, Cab Serial Number, Cab Door Key Number, Registration Number, Front Axle Serial Number |
| Specifications | 26-43 | Diesel Engine Specifications, Fuel, Brake and Clutch Fluid, Anti-Freeze, Grease, Approved Lubricants, Tyre Sizes, Maximum Loads and Pressures |
| Instrument and Controls | 44-72 | Operating Instruments, Warning Lamps, Operating Controls, Operating Pedals, Control Levers, Controls - Cab Roof Console, Controls - Cab, Seat Belts |
| Operating | 73-118 | Operating the Engine, Starting Procedure, Stopping Procedure, Operating the Synchromesh Transmission, Travel Speed Chart, Four Wheel Drive, Ballast, Measuring Wheel Slip |
| Maintenance | 119-166 | Introduction, First Oil Change at 20 to 60 Hours, Service Chart, Service Chart - Front Axle, Grease Fittings, Daily 10 Hour Service, 50 Hour Service, 100 Hour Service |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Clutch plate diameter | 309 mm (12in) | p. 28 |
| Engine Piston Displacement | 5.4 litre | p. 24 |
| Engine Compression Ratio | 16:1 | p. 24 |
| Engine Valve Clearance (Engine Cold) | 0.25 mm | p. 24 |
| Engine Oil Working Pressure | 3.1 bar | p. 25 |
| Battery (Standard Duty) Discharge | 420 Ampere for 1 Minute | p. 26 |
| Brakes Diameter | 222 mm | p. 26 |
| PTO Speed (540 r/min) | 2050 Engine r/min | p. 26 |
| Linkage Maximum Static Lift | 2990 kg | p. 27 |
| Hydraulic System Maximum Pressure | 172 bar | p. 28 |
| Cooling System Capacity | 15.3 litre | p. 29 |
| Fuel Tanks Total Capacity | 136 litre | p. 29 |
David Brown 1690 Turbo -4WD, 1690 Turbo -4WD Synchromesh Transmission Common Problems This Manual Covers
David Brown 1690 Turbo Tractor-4WD analog oil pressure gauge drops suddenly during heavy field operation.
Stop the engine immediately. Verify the engine oil working pressure reaches 3.1 bar at normal operating temperature, as noted on page 25. If the analog gauge shows persistent low pressure, inspect the 6-cylinder engine oil pump for signs of internal failure.
Manual Section: Instrument and Controls p. 25Steering assist cuts out or hydraulic system response becomes sluggish when lifting heavy implements.
Check fluid levels before operating the machine. Verify the hydraulic system can maintain a maximum pressure of 172 bar, which is detailed on page 28. If the pressure drops under load, inspect the power steering seals and check the main hydraulic pump for age-related degradation.
Manual Section: Specifications p. 28Power take-off fails to engage properly or clutch slips violently under high torque loads.
Inspect the clutch assembly for wear. Verify the 309 mm double dry plate clutch is functioning correctly as shown on page 28. Run the engine to 2050 Engine r/min to achieve a 540 r/min PTO speed. Replace worn clutch plates if slipping continues.
Manual Section: Specifications p. 28Engine temperature gauge spikes into the red zone quickly during extended summer field work.
Drain and flush the cooling system according to the maintenance schedule. Fill the radiator to the full 15.3 litre capacity listed on page 29. Check the analog temperature gauge on the dashboard to ensure the engine stays within safe operating limits.
Manual Section: Specifications p. 29Frequently Asked Questions
What format is this 1690?
A 166-page Operator Manual in searchable PDF format, available the moment you complete checkout. View on computer, tablet, or phone, with no shipping wait.
Is this 1690?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
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