For Case David Brown 770, 780, 880, 990, 1200 Implematic Tractor, this reference brings together the listed repair manual material. Start with Front Wheel Alignment and follow the relevant document section for the task.
What’s Covered Inside
Front Axle and Steering
Front Wheel Alignment
Front Hubs
Stub Axles
Front Axle
Steering Box
Power Assisted Steering
Operation
Maintenance and Services
Fault Finding
Repair Operations
Hydrostatic Power Steering
Operation
Operation of Servo Valve
Maintenance and Service
Fault Finding
Repair Operations
Dimension data
Introduction
The engine fitted to 990 Agricultural Tractors is designated A04/47 and is a four-cylinder unit of 3i in. bore and 4½ in. stroke, fitted with wet cylinder sleeves. As the engine must have a flywheel suitable for the clutch (Live drive or Non-Live drive) the suffix A or B is included in the designation to indicate the type of flywheel fitted and therefore the tractor model on which the engine is used.
The engine fitted to 990 Industrial Tractors is designated 104/47 and is basically identical to the A04/47 engine, the only difference being that the 104/47 engine is fitted with a flywheel suitable for the twin-plate clutch and has a splined coupling flange attached to the longer flywheel bolts.
Use publication 9-38100 (Sep 1969) with the David Brown 770, 780, 880, 990, 1200 Implematic model details to select the appropriate documentation. Refer to Front Wheel Alignment within its stated document and equipment scope.










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