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'll 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.
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 Tractor-4WD, 1690 Turbo Tractor-4WD Synchromesh Transmission Common Problems This Manual Covers
David Brown 1690 Turbo Tractor-4WD analog oil pressure gauge drops suddenly during heavy field operation. p. 25
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 ControlsSteering assist cuts out or hydraulic system response becomes sluggish when lifting heavy implements. p. 28
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: SpecificationsPower take-off fails to engage properly or clutch slips violently under high torque loads. p. 28
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: SpecificationsEngine temperature gauge spikes into the red zone quickly during extended summer field work. p. 29
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: SpecificationsFrequently Asked Questions
How do you fix 1690 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.
How do you fix steering 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.
How do you fix power 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.
How do you fix engine 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.
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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