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Perkins 403C-11 Engine

The Perkins 403C-11 is a 4-stroke vertical inline 3-cylinder indirect injection naturally aspriated liqiud-cooled diesel engine from 400 series. A 69 cu.in (1.1 L) engine has a cylinder bore of 3.03" (77 mm), piston stroke of 3.19" (81 mm), and rated power of 26.4 Hp (19.5 kW) at 3000 rpm. The compression ratio rating is 23.0:1. The Perkins 403C-11 engine is equipped with a cassette type fuel injection pump, forced lubrication with gear pump, dry element air cleaner, and starting system with electric starter. The operating weight is 191 lbs (87 kg).

General Technical Data

Engine Specifications

Engine Model ............... Perkins 403C-11
Engine Type ............... 4-cycle vertical liquid-cooled diesel
Number of Cylinders ............... 3
Cylinder Arrangement ............... In-line
Engine Bore, in (mm) ............... 3.03 (77.0)
Engine Stroke, in (mm) ............... 3.19 (81.0)
Displacement, cu.in (L) ............... 69 (1.13)
Aspiration Type ............... Naturally aspriated
Rated Engine Power, hp (kW) ............... 26.4 (19.5)
Rated Engine Speed, rpm ............... 3000
Compression Ratio ............... 23:1
Firing Order ............... 1-2-3
Lubrication System ............... Forced with gear pump
Oil Filter Type ............... Spin-on full flow
Cooling System ............... Liquid-cooled
Air Cleaner Type ............... Dry element
Starting System ............... Electric Starter
Electrical System Rating, Volts ............... 12
Charging System ............... Alternator

Fuel System

Fuel System ............... Indirect injection
Injection Pump Type ............... Cassette
Governor Type ............... Mechnical
Fuel Filter Type ............... Paper element
Fuel Type ............... Diesel Fuel

Dimensions and Weight

Overall Length, in (mm) ............... 19.3 (490)
Overall Width, in (mm) ............... 15.7 (400)
Overall Height, in (mm) ............... 22.6 (575)
Net Weight, lbs (kg) ............... 191 (87)

Maintenance Data

Cylinder and Valves

Cylinder Compression, psi (MPa) .................. 426 (2.94)
Cylinder Bore Inside Diameter (Max), in (mm) ............... 3.039 (77.20)
Cylinder Head (Max Out of Flatness), in (mm) ............... 0.0011 (0.03)
Intake Valve Clearance, in (mm) ............... 0.008 (0.20)
Exhaust Valve Clearance, in (mm) ............... 0.008 (0.20)

Engine Oil and Coolant

Engine Oil Type (Summer) .................. SAE 10W-30, 15W-40
Engine Oil Type (Winter) ......................... SAE 5W-30
API Service Classifications ......................... CE, CF, CF-4, CG-4, CH-4
Engine Oil Capacity, qts (L) .................. 5.2 (4.9)
Coolant Capacity (Engine), qts (L) ............... 2.0 (1.9)

Service Specifications

Cylinder Block

Cylinder Bore Inside Diameter (Std), in (mm) ............... 3.031-3.032 (77.000-77.019)
Cylinder Bore Inside Diameter (Wear Limit), in (mm) ............... 3.039 (77.20)
Connecting Rod Big End Bearing Clearance, in (mm) ............... 0.004-0.012 (0.10-0.30)
Connecting Rod Small End Bushing Clearance, in (mm) ............... 0.0004-0.0010 (0.01-0.025)
Crankshaft Journal Outside Diameter (Std), in (mm) ............... 1.8883-1.8888 (47.964-47.975)
Crankshaft Journal Outside Diameter (Wear Limit), in (mm) ............... 1.886 (47.90)
Crank Pin Outside Diameter (Std), in (mm) ............... 1.6128-1.6132 (40.964-40.975)
Crank Pin Outside Diameter (Wear Limit), in (mm) ............... 1.6102 (40.90)
Piston Skirt Outside Diameter, in (mm) ............... 3.0288-3.0294 (76.932-76.947)
Piston Pin Outside Diameter, in (mm) ............... 0.8266-0.8268 (20.996-21.002)
Piston to Cylinder Bore Clearance, in (mm) ............... 0.0021-0.0034 (0.0525-0.0865)
Top Ring Side Clearance, in (mm) ............... 0.0024-0.0039 (0.06-0.10)
Second Ring Side Clearance, in (mm) ............... 0.0020-0.0035 (0.05-0.09)
Oil Ring Side Clearance, in (mm) ............... 0.0008-0.0024 (0.02-0.06)
Top Ring End Gap, in (mm) ............... 0.0059-0.0106 (0.15-0.27)
Second Ring End Gap, in (mm) ............... 0.0047-0.0094 (0.12-0.24)
Oil Ring End Gap, in (mm) ............... 0.0079-0.0138 (0.20-0.35)

Cylinder Head and Valves

Cylinder Head Flatness, in (mm) ............... 0.0011-0.0020 (0.03-0.05)
Intake Valve Clearance (Cold), in (mm) ............... 0.008 (0.20)
Exhaust Valve Clearance (Cold), in (mm) ............... 0.008 (0.20)
Intake Valve Spring Free Length, in (mm) ............... 1.378 (35.0)
Exhaust Valve Spring Free Length, in (mm) ............... 1.378 (35.0)
Intake Valve Stem Outside Diameter, in (mm) ............... 0.2738-0.2744 (6.955-6.970)
Exhaust Valve Stem Outside Diameter, in (mm) ............... 0.2732-0.2736 (6.940-6.950)
Intake Valve Head Thickness, in (mm) ............... 0.0364-0.0423 (0.925-1.075)
Exhaust Valve Head Thickness, in (mm) ............... 0.0364-0.0423 (0.925-1.075)
Intake Valve Seat Width, deg ............... 0.067-0.083 (1.70-2.10)
Exhaust Valve Seat Width, deg ............... 0.067-0.083 (1.70-2.10)
Intake Valve Guide To Valve Stem Clearance, in (mm) ............... 0.001-0.002 (0.025-0.052)
Exhaust Valve Guide To Valve Stem Clearance, in (mm) ............... 0.0018-0.0028 (0.045-0.072)
Intake Cam Height, in (mm) ............... 1.0612-1.0634 (26.955-27.010)
Exhaust Cam Height, in (mm) ............... 1.0612-1.0634 (26.955-27.010)

Tightening Torque Specs

Exhaust manifold bolts, Nm (lb-ft) ............... 9.8 (7.2)
Fuel injection pipes, Nm (lb-ft) ............... 23 (16.9)
Cylinder head bolts, Nm (lb-ft) ............... 51 (36.7)
Connecting rod nuts, Nm (lb-ft) ............... 32 (23.6)
Crankshaft pulley bolts, Nm (lb-ft) ............... 123 (90.7)
Crankshaft bearings bolts, Nm (lb-ft) ............... 27 (19.9)
Delivery valve holder, Nm (lb-ft) ............... 42 (31)
Pressure relief valve, Nm (lb-ft) ............... 64 (47)
Sump drain plug, Nm (lb-ft) ............... 35 (25.8)
Oil pressure switch, Nm (lb-ft) ............... 10 (7.3)
Atomiser high-pressure pipes, Nm (lb-ft) ............... 23 (16.9)
Fuel lift pump bolts, Nm (lb-ft) ............... 6 (4.4)
Fuel injection pump fasteners, Nm (lb-ft) ............... 6 (4.4)
Fan drive pulley bolts, Nm (lb-ft) ............... 11 (8)
Flywheel bolts, Nm (lb-ft) ............... 74 (54.5)
Glow plug, Nm (lb-ft) ............... 18 (13.2)

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