Caterpillar D4D Tractor Service Manual Set, 1983 (P/N SEBU5335-01)

Match the machine serial number to the maintenance guide for its service schedule and wiring diagram. For repair work, use the engine and power train sections that match the installed components and drive configuration.

Final fuel rack settings, governor adjustments, and off-engine injection pump timing require the separate Testing and Adjusting section. Electrical coverage consists of wiring diagrams and component removal and installation. Implement hydraulic coverage is limited to routine service and Power Shift hydraulic tank and dash removal and installation.

PDF Search and Wiring Detail

Finding text and reading diagrams: All four PDFs have OCR text search. Some charts, illustrations, and diagram labels are only partly searchable. Navigation uses the printed contents and indexes, with no embedded PDF bookmarks. Zoom in to read the small wire and terminal labels, especially the faint labels in the September 1983 maintenance manual.

The ZIP contains four printable PDFs totaling 376 pages, including eight front and back covers and nine blank interior pages.

Maintenance, Engine Rebuilds, and Power Train Work

The selected procedures below show the main workshop coverage. The publications also cover equalizer spring disassembly and fuel priming pump replacement.

• Scheduled maintenance: Walk-around checks, lubrication charts, fluid and filter service, valve lash checks, and track adjustment organized by service interval and serial range.

• Engine disassembly and assembly: Engine removal and installation for Direct Drive and Power Shift tractors, plus cylinder head, piston, liner, and crankshaft work.

• Fuel injection and governors: Pump and governor removal and installation for sleeve-metering and compact systems, with internal service for the later sleeve-metering and compact designs.

• Tracks and final drives: Track separation and connection, roller and front idler rebuilding, hydraulic track adjuster and recoil spring service, sprocket removal, and track frame alignment.

• Steering and bevel gears: Steering clutch and brake band service, final drive pinion work, bevel gear bearing preload, backlash adjustment, and tooth contact checks.

• Transmission and clutch work: Direct Drive and Special Application flywheel clutches and transmissions, plus Power Shift torque converters, transfer gears, transmission oil pumps, filters, and hydraulic controls.

The repair sections suit heavy equipment mechanics equipped to hoist major assemblies and use the specified pullers, presses, and measuring tools.

Engine Rebuild and Fuel System Differences

The engine section covers rocker shafts, pushrods, valves, valve seat inserts, guides, connecting rod and main bearings, camshaft bearings, and balancer shafts. It also covers the oil and water pumps, radiator and core, crankshaft seals, timing gears, accessory drive, and flywheel. Electrical component procedures include alternator, starting motor, and glow plug removal and installation.

Match the installed fuel system to the procedure before removing the pump housing. The earlier and later sleeve-metering systems and the compact system have different procedures for pump and governor work. The instructions show how to establish timing position during installation, including use of the 8S5417 Timing Fixture Plate on the compact system. The engine section also lists the 1P5510 Liner Projection Tool Group and 8S2241 Camshaft Bearing Tool Group.

On the later sleeve-metering system, incorrect governor lever engagement can cause engine overspeed. The fuel transfer pump procedure calls for tooling to install the sleeve because hammering it can load the camshaft and damage components in the pump housing.

Undercarriage and Drive Setup

The recoil spring procedures specify the FT577 Spring Compressor for the stored spring load. The hydraulic track adjuster procedures address pressure relief before disassembly. Blocking and hoisting instructions accompany heavy component removal, and the 5F9890 Sprocket Shaft Puller Group is listed for sprocket shaft work.

The bevel gear instructions pair backlash measurement with tooth contact illustrations for correct, short-toe, and short-heel patterns. They specify the 8S2328 Dial Test Indicator Group and show how shim changes affect the contact pattern. The Power Shift section also includes flexible coupling runout checks, selector and pressure control valve cross-sections, and full-page views of the transmission and transfer gears.

Service Schedules and Wiring Differences

The early lubrication guide has 44 numbered chart items and the later maintenance manual has 39. Both schedule work from 10 through 2,000 service hours, with a separate When Required section. The procedures cover steering clutch and brake adjustment, transmission and hydraulic filter service, final drive and bevel gear lubrication, and service for bulldozer linkage, cutting edges, end bits, and ripper tips.

The early wiring diagram shows the generator and voltage regulator. The September 1983 diagram shows the alternator circuit. Both trace starting, charging, and lighting circuits. The maintenance guides also provide fuel and lubricant classifications, approximate refill capacities, and serial number location illustrations. The later manual includes a torque chart for Caterpillar plow bolts.

Cylinder Liner and Clutch Piston Check Examples

For the D4D engine, the liner installation procedure specifies 0.0020–0.0056 in. (0.051–0.142 mm) of liner projection. The measurement is taken at four points around the liner with the liner clamped in the block and its O-rings removed. The maximum difference is 0.001 in. (0.03 mm) across those readings and between adjacent liners.

Before the Power Shift transmission case is installed, the clutch piston check uses the FT834 testing nozzle and 100–150 psi of air with oil in the clutch ports. The manual gives approximately 0.080–0.200 in. (2.03–5.08 mm) of piston travel.