Need the factory operating and maintenance procedures for your David Brown 990, 995, or 996? This 150-page Quiet Cab operator manual (OEM #9-5106) walks you through the Synchromesh Transmission, Differential Lock, and the complete Selectamatic Hydraulic System across depth control, height control, and trailed implement operation. Inside, you get wiring diagrams for the electrical circuits, hydraulic schematics for the fluid system, and five graded service intervals (Tasks A through E) with a daily inspection checklist, lubrication chart, and approved lubricant specs for every fill point. Set the multi-speed PTO to 540 or 1000 RPM for your implement, then dial in track width and confirm tyre pressures using the factory figures in the Wheels and Axles section. Every hour this machine sits idle costs you. Bookmark-navigable and keyword-searchable; open it on your phone, find the spec, and get rolling.
What's Inside This David Brown 990, 995, 996 Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety Points | ii | Safety Precautions for Tractor Operation, Safe Working Practices |
| Important Don'ts | iii | Prohibited Operations, Safety Warnings, Actions to Avoid |
| Description & Operation-General | 12-25 | Instrument Panel, Levers and Pedals, Synchromesh Transmission, Brakes, Clutch, Differential Lock |
| The Selectamatic Hydraulic System | 26-43 | Introduction, Selectamatic Controls, Trailed Implements, Operating with Depth Control, Operating with Depth Wheel, Operating with Height Control |
| Adjustments and Settings | 44-65 | Linkage Settings, Stabilisers, Drawbar, Pick-Up Hitch |
| Regular Maintenance | 66-83 | Introduction, Table of Routine Service Tasks, Daily Inspection, Lubrication Chart, Service Task a, Service Task B, Service Task C, Service Task D |
| Service Information | 84-123 | Introduction, Bonnet Removal |
| Specification and Data | 124-150 | Abbreviations, Lighting Equipment, Chassis, Engine, Travel Speed Tables, Accessories |
David Brown 990, 995, 996 Common Problems This Manual Covers
David Brown 990, 995, and 996 tractors pulling to one side and brake binding or uneven wheel turning p. 56
Inspect the brake rods for improper adjustment. Loosen locknuts on the adjusting screws and equalize the pedal travel. Consult the maintenance schedule on page 56 for routine checks. Verify pedal free travel measures exactly 1 inch (25.4 mm) before operating in road gear.
Manual Section: Adjustments and SettingsHigh engine oil consumption and cylinder wall glazing after prolonged operation under light load conditions p. 15
Operate the tractor in the correct gear to maintain appropriate engine load. Avoid idling for extended periods. Check the operating instructions on page 15 for proper gear selection. Perform a daily inspection every 10 hours to monitor oil levels and prevent further cylinder glazing.
Manual Section: Description & Operation-GeneralTrailed implements dropping unevenly or poor depth control response during field operation p. 25
Inspect the Selectamatic hydraulic controls and depth wheel. Verify linkage settings match your implement type. Review the hydraulic schematic on page 25 for fluid flow paths. Drain and replace the transmission fluid filter every 500 hours to maintain system cleanliness and consistent depth control.
Manual Section: Description & Operation-GeneralEngine laboring unduly under load with the oil bath filter element becoming damp or perforated p. 66
Remove the oil bath filter wire mesh element and inspect for damage. Replace the paper element pre-filter if it is heavily soiled. Clean the breather and filter sealing rings. Review the maintenance steps on page 66 and perform this check every 50 hours.
Manual Section: Regular MaintenanceFrequently Asked Questions
What are the torque specs for the engine bolts on David Brown 990, 995, and 996?
For the cylinder head bolts on David Brown 990, 995, and 996 tractors, use a torque wrench set at 13.8 kg m (100 lb ft) to tighten them. The tightening sequence is illustrated in Figure 5/16 of the manual.
How to reset the clutch engagement on David Brown 990?
To reset clutch engagement, adjust the free play for both the Livedrive and Independent PTO clutches. For the Livedrive clutch, the free play at the master cylinder push rod end should be between 6 mm (1/4 in) and 10 mm (3/8 in). For the Independent PTO clutch, the free travel in the cable should be between 2.5 and 3 mm, adjusted via the threaded adjuster (A, Fig. 5/30).
How to reset the PTO clutch on David Brown 996?
To reset the PTO clutch engagement, adjust the free play in the cable. The amount of free travel in the PTO clutch cable should be maintained between 2.5 and 3 mm. This adjustment is performed using the threaded adjuster (A) as shown in Figure 5/30.
How do you fix david Brown 990, 995, and 996 tractors pulling to one side and brake binding or uneven wheel turning?
Inspect the brake rods for improper adjustment. Loosen locknuts on the adjusting screws and equalize the pedal travel. Consult the maintenance schedule on page 56 for routine checks. Verify pedal free travel measures exactly 1 inch (25.4 mm) before operating in road gear.
How quickly can I access this manual after buying?
Immediate download of the complete 150-page searchable Operator Manual. Access it on any device, from a laptop at your desk to a phone in the field.
Can I print specific sections of this David Brown 990, 995, 996 Operator Manual?
Yes, print as many copies as you want, and there are no restrictions. Many mechanics print the section they need and bring it to the shop floor.
Does this David Brown 990, 995, 996 manual include hydraulic schematics?
Included. A hydraulic system diagram shows the main hydraulic layout for the David Brown 990, 995, 996.
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