Perkins 402D, 403D, 404D Engine Operation & Maintenance Manual (P/N SEBU8311-00)

• Exact engine coverage: 402D-05; 403D-07, 403D-11, 403D-15, and 403D-15T; plus 404D-15, 404D-22, 404D-22T, and 404D-22TA. These are two-, three-, and four-cylinder indirect-injection diesels in naturally aspirated, turbocharged, and turbocharged-aftercooled form, identified by engine prefixes GG, GH, GJ, GK, GL, GM, GN, GP, and GQ.
• Four Perkins factory publications in one 334-page PDF: SEBU8311-00 Operation and Maintenance Manual, April 2007, 90 pages; KENR6226-00 Disassembly and Assembly, March 2007, 104 pages; KENR6225-00 Systems Operation, Testing and Adjusting, August 2007, 96 pages; and KENR6223 Specifications, May 2007, 44 pages.
• Internal engine repair coverage runs from the fuel injection pump, injectors, turbocharger, cylinder head, valve gear, camshaft, front housing, and timing gears through the oil pump, pistons, connecting rods, crankshaft, main bearings, seals, flywheel, and flywheel housing.
• Removal, disassembly, inspection, assembly, and installation procedures are provided for major engine components, with separate instructions where water pumps, transfer pumps, crankcase breathers, rocker assemblies, alternators, or flywheel housings differ by build.
• Factory testing and fault isolation address injection timing, injector operation, governor setup, air in fuel, wastegate operation, compression, valve lash and valve depth, oil pressure, cooling-system faults, bearing wear, flywheel and housing runout, starting, charging, and shutdown circuits.
• Electrical diagnosis and technical views cover alternator, battery, charging, starting, temperature- and oil-pressure switches, the fuel shutoff solenoid, glow plugs, automatic-shutdown wiring, connector identification, front-gear timing, and crankshaft seal installation.
• Serial-break information: The cylinder-block-mounted oil-pressure switch on 403D-15/403D-15T and 404D-22/404D-22T/404D-22TA engines is separated before and after engine serial 519585L, with a blue connector before the break and a black connector after it.

Repair Depth and Variant Splits

SEBU8311-00 itself stops short of major overhaul details. The three KENR modules supply the internal repair procedures, testing methods, adjustment data, and component specifications that complete the set. This material is suited to trained diesel technicians with the required measuring equipment and service tooling; the manual specifically limits fuel injection nozzle disassembly and repair to personnel with the proper training.

Variant coverage is handled inside the procedures rather than left to a general model list. The set separates mechanical and electric fuel transfer pumps, naturally aspirated and turbocharged breathers, small- and large-engine cooling components, flywheel housings with or without a back plate, and the different rocker-shaft groups. Alternator removal procedures are divided by output class, while governor work covers front-housing replacement and the boost compensation device where fitted.

Factory Tests, Specifications, and Tooling

Troubleshooting is organized around hard starting, rough running, misfire, smoke, loss of power, high fuel use, abnormal oil pressure or consumption, overheating, starter faults, and irregular charging. The Specifications volume supplies component torque data, clearances, inspection and service limits, bearing-journal and piston-ring data, head-gasket selection, injection-timing information, belt-tension data, and electrical component specifications.

Named service tools are tied to specific work: injector pipe nut tool 27610294, valve spring compressor 21825739, ridge reamer 27610274, piston ring compressor 21825491, and dial indicator group 21825617. Governor and front-housing setup also identifies dial holder 27610331, cylinder-block adapter 27610332, and calibration spring 27610333.

Drawing examples include the automatic-shutdown wiring diagram for 14/15-amp alternators, the 40- and 55-amp alternator wiring diagrams, the shutdown connector pin-location view, a front gear timing view, and a crankshaft wear-sleeve sectional view.

Operation, Maintenance, and Scope

The operation volume covers lifting and storage, gauges, prestart checks, glow-plug starting, cold-weather operation, normal and emergency shutdown, and grounding practices. Its maintenance section provides model-specific refill-capacity tables; approved fuel, oil, coolant, ELC, and supplemental coolant additive guidance; and interval-based procedures for belts, filters, air cleaners, engine oil, cooling-system service, fuel-system priming, hoses, the radiator, valve-lash inspection, and water-pump checks.

Coverage is confined to the engine and its engine-side electrical circuits. It does not provide host-machine transmission, hydraulic, chassis, or in-machine engine removal and installation procedures.

Repair Cautions and Safety

The front-housing and timing procedures warn that rotating the crankshaft with the front housing removed can damage the engine. Crankcase-breather assembly and vent orientation also matter; an incorrectly assembled or restricted breather can cause engine damage.

Fuel-injection testing, spring-loaded valve work, rotating assemblies, hot pressurized coolant, electrical circuits, and engine lifting require proper isolation, support, protective equipment, and close use of the factory safety instructions.