CASE David Brown 1190, 1194, 1290, 1294, 1390, 1394, 1490, 1494, 1594, 1690 Tractor Shop Manual (P/N 87500293)

• 110-page PDF covering Case International (David Brown) 1190, 1194, 1290, 1294, 1390, 1394, 1490, 1494, 1594, and 1690 tractors, including the 3-, 4-, and 6-cylinder diesel configurations used across the range.
• Covers engine removal, cylinder-head and valve-train repair, timing gears, camshaft, pistons and connecting rods, crankshaft and bearings, oil pumps, turbocharger service where fitted, injection-pump timing, and injector testing/overhaul.
• Details tractor splitting and clutch service, Synchromesh transmission removal and internal overhaul, Power Shift pump/valve and planetary-unit work, PTO service, differential adjustment, and final-drive repair.
• Distinguishes two-wheel-drive front axles from David Brown and Carraro front-drive axles, with procedures for axle removal, stub axles, planetary final drives, differential overhaul, pinion setup, bearing preload, backlash, and transfer gearboxes.
• Includes hydrostatic steering bleeding and pressure diagnosis, steering-pump/valve/cylinder overhaul, plus Selectamatic hydraulic operating principles, troubleshooting, pump and valve service, rockshaft work, draft-sensing adjustments, and linkage setup.
• Electrical coverage includes battery and current-drain checks, charging-system fault isolation, Lucas and AC Delco alternator tests/overhaul, Lucas and Bosch starter service, warning circuits, gauges, lighting, and cab-accessory circuits, with the related electrical test specifications.
• Numbered figures run through Fig. 278 and include exploded assemblies, section views, test arrangements, timing diagrams, specification tables, and hydraulic schematics rather than only parts illustrations.

This shop manual is built around actual workshop repair rather than operator-level maintenance alone. It assumes familiarity with tractor splitting, heavy component handling, measuring instruments, pressure gauges, injector test equipment, and model-specific service tools, making it best suited to experienced mechanics and owners already comfortable with major tractor repair.

Model and Configuration Differences

The manual separates procedures where the tractors differ rather than treating the 1190–1690 family as one mechanical design. Early 1290 tractors use a different engine build: models with the independent PTO clutch before P.I.N. 11052369, or the continuous PTO clutch before P.I.N. 11052410, use the 3.2-liter engine; later units use the 3.6-liter version, although the manual states that the service procedures are the same.

Front-wheel drive is covered for the applicable models other than the 1190 and 1194. The axle chapters distinguish David Brown units from Carraro designs, including AE1, AE2, AE3, limited-slip arrangements, and later production changes. The 1394 also has a front-axle/steering change at P.I.N. 11504412. Synchromesh transmission construction changes at P.I.N. 11139846 on the 1394 and P.I.N. 11194089 on the 1494, with separate internal layouts for the early and later designs. Power Shift coverage applies to the 1394, 1490, 1494, 1594, and 1690.

Repair Depth Across the Tractor

Engine sections cover removal and installation as well as internal inspection and repair of the cylinder head, valve seats and guides, rocker gear, timing system, camshaft, pistons, cylinders, crankshaft, bearings, lubrication system, and flywheel. The diesel-fuel chapters add system bleeding, Thermostart troubleshooting, transfer-pump service, injection-pump timing and removal, and injector fault isolation, nozzle testing, and overhaul. Component-specific torque specifications, wear limits, running clearances, capacities, timing data, and adjustment values are provided throughout.

Drivetrain coverage includes Borg & Beck and Laycock clutch arrangements, clutch adjustment and overhaul, Synchromesh and Power Shift transmissions, main bevel gears, differential lock, final drives, brake systems, and PTO assemblies. The brake chapters distinguish the shoe-and-drum systems used on the smaller models from the disc-brake arrangements on the 1490, 1494, 1594, and 1690, including hydraulic brake bleeding and component service.

The hydraulic and steering material goes well beyond fluid changes. It includes system-pressure testing, pump diagnosis and overhaul, steering-valve overhaul, multiple steering-cylinder layouts, remote and three-way valves, Selectamatic valve service, rockshaft removal/overhaul, draft-sensing linkage, and hydraulic troubleshooting. Electrical material is primarily component-test and fault-finding coverage; it is not presented as a separate full-tractor wiring-diagram section.

Tools, Figures, and Manual-Specific Repair Notes

Special-tool references include the DB-8208 pinion-setting fixture for the David Brown front-drive axle, CAS-1607 for front-drive final-drive work, CAS-1238/CAS-1239 for steering-valve service, CAS-1229 for timing-cover/front-seal centering, Case tractor-splitting stands, and dedicated clutch service tooling.

Representative illustrations include the Carraro front-drive axle exploded view, transfer-gearbox layouts for Carraro/Synchromesh combinations, 3-, 4-, and 6-cylinder timing-gear alignment diagrams, the model/P.I.N.-specific injection-pump timing table, Power Shift control-valve views, and the rear-, single-front-, and tandem-front-pump hydraulic schematics.

The manual specifically warns that rotating the camshaft or crankshaft with the timing gears removed can damage valve heads or piston crowns. It also calls out the risk of damaging front-drive axle oil seals if the axle shaft is moved too far during final-drive repair.

Several procedures involve tractor splitting, supported axle or cab assemblies, hydraulic pressure testing, and air-conditioning refrigerant service, so suitable lifting/support equipment and the applicable safety procedures are necessary.