Description
JCB Perkins 402D 403D 404D Specifications Manual is a 44-page technical publication covering the Perkins 402D, 403D and 404D industrial diesel engine range. Publication KENR6223-01 provides engine specifications and component data for the individual two-, three- and four-cylinder engine variants listed below.
This manual is intended for professional engine workshops, service technicians and engineers who require the correct dimensional, adjustment and component specifications when inspecting or servicing these engines. It is a specifications publication rather than a complete step-by-step overhaul manual.
The information is organised by engine assembly and component group. It includes engine configuration data, valve settings and detailed specifications for fuel-system, cylinder-head, lubrication, cooling, rotating, timing, starting and charging components.
ENGINE DESIGN AND CONFIGURATION
The engine design section distinguishes the individual 402D, 403D and 404D variants. Depending on model, the manual records two-, three- or four-cylinder arrangements together with the applicable engine data.
- Engine bore and stroke
- Engine displacement
- In-line cylinder arrangement
- Combustion type
- Compression ratio
- Number of cylinders
- Valves per cylinder
- Inlet and exhaust valve lash
- Firing order
- Crankshaft and camshaft direction of rotation
FUEL SYSTEM AND CYLINDER HEAD
The publication provides specifications for the principal fuel-delivery and upper-engine components. These details assist with component assessment, installation and comparison against the stated factory figures.
- Fuel injection lines
- Fuel injection pump
- Fuel transfer pump
- Rocker shaft
- Valve mechanism cover
- Cylinder-head valves
- Cylinder head
- Exhaust manifold
- Camshaft
LUBRICATION AND COOLING COMPONENTS
Dedicated entries cover the main engine lubrication components and cooling-system regulator. The manual supplies the relevant technical values and component information rather than general machine-level service instructions.
- Engine oil lines
- Engine oil relief valve
- Engine oil pump
- Water temperature regulator
- Coolant temperature switch
- Engine oil pressure switch
CYLINDER BLOCK AND ROTATING ASSEMBLY
Specifications are included for the principal internal engine components. This section is useful when checking crankshaft journals, connecting components and piston assemblies during engine inspection or repair preparation.
- Cylinder block
- Connecting-rod bearing journal
- Main bearing journal
- Connecting rod
- Piston and rings
- Front housing
- Front gear group
- Flywheel
- Flywheel housing
- Crankshaft pulley
AUXILIARY DRIVE AND ELECTRICAL COMPONENTS
The manual also addresses selected external engine and electrical components associated with installation and operation.
- Belt tension chart
- Fan drive
- Engine lifting bracket
- Alternator and regulator
- Electric starting motor
JCB PERKINS 402D 403D 404D SPECIFICATIONS MANUAL COVERAGE
The JCB Perkins 402D 403D 404D Specifications Manual explicitly covers the following industrial engine models:
- Perkins 402D-05
- Perkins 403D-07
- Perkins 403D-11
- Perkins 403D-15
- Perkins 403D-15T
- Perkins 403D-17
- Perkins 404D-15
- Perkins 404D-22
- Perkins 404D-22T
- Perkins 404D-22TA
MANUAL DETAILS
- Manufacturer supplied: JCB
- Engine manufacturer: Perkins
- Manual type: Engine specifications manual
- Publication number: KENR6223-01
- Page count: 44 pages
- Language: English
This is a focused factory specifications reference for the stated Perkins industrial engine models. It is particularly useful where technicians need model-specific dimensions, settings and component data without consulting a broader machine manual.
Because the publication covers the engine range rather than a complete JCB machine, it should be used alongside the appropriate service procedures and machine-specific technical information where required.

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