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Perkins F3.144 Engine (Fordson Dexta)

General Technical Data

Perkins F3.144 Engine Specifications

Engine Model ...................... Ford-Perkins F3.144
Engine Type ...................... Vertical, 3 cylinder direct injection diesel
Number of Cylinders ...................... 3, in-line
Displacement, cu in (L) ...................... 144.0 (2.40)
Engine Bore, in (mm) ...................... 3.5 (89.0)
Engine Stroke, in (mm) ...................... 5.0 (127.0)
Aspiration ...................... Natural
Rated Engine Power, hp (kW) ...................... 32.0 (23.9)
Rated Engine Speed, rpm ...................... 2000
Maximum Torque, Nm (ft-lbs) ...................... 126 (93)
Torque Speed, rpm ...................... 1200
Compression ...................... 16.5:1
Firing Order ...................... 1-2-3
Electrical System Rating, Volts ...................... 12

Fuel System

Fuel System ...................... Direct injection
Fuel Lift Pump Type ...................... Diaphragm with hand primer.
Fuel Filter Type ...................... Replaceable paper element
Air Cleaner Type ...................... Oil bath
Fuel Injection Pump Type ...................... Enclosed camshaft with pneumatic governor
Camshaft Rotation ...................... Clockwise from drive end
Governor Type ...................... Pneumatic
Fuel Tank Capacity, gal (L) ...................... 8.4 (31.8)

Lubrication System

Lubrication System Type ...................... Under pressure, forced feed type
Oil Filter Type ...................... Full flow, pressure relief, replaceable element
Oil Pump ...................... Rotor type

Cooling System

Cooling System Type ...................... Pressure
Water Pump ...................... Centrifugal type
Fan ...................... 2/4 blades
Thermostat ...................... Controlled with by-pass

Perkins F3.144 Maintenance Data

Fuel type ...................... Diesel fuel No. 2-D
Engine oil type ...................... SAE 5W/20W
Engine oil capacity, qts (L) ...................... 7.7 (7.2)
Coolant capacity, qts (L) ...................... 9.0 (8.5)
Oil filter replacement interval ...................... Every 200 hours
Oil change interval ...................... Every 200 hours
Fuel filter replacement interval ...................... Every 300 hours

Fordson Dexta Engine Service Specifications

Cylinder Liners

Method of retention ...................... Interference fit
Amount of interference, in (mm) ...................... 0.002-0.004 (0.051-0.102)
Outside diameter bore in cylinder block, in (mm) ...................... 3.6895-3.6905 (93.637-93.663)
Internal diameter (before finish boring), in (mm) ...................... 3.478-3.482 (88.341-88.443)
Diameter of finished bore (standard), in (mm) ...................... 3.501-3.502 (88.925-88.951)
Diameter of finished bore 0.030 in (0.762 mm) o/s, in (mm) ........ 3.531-3.532 (89.687-89.713)

Pistons

Piston Type ...................... High silicon, aluminium alloy
Piston diameter at bottom of skirt at 90 deg. to piston pin, in (mm) .... 3.4964-3.4974 (88.808-88.834)
Piston diameter at bottom of skirt in line with piston pin, in (mm) ....... 3.4944-3.4962 (88.758-88.803)
Piston oversizes, in (mm) ...................... 0.030 (0.762)
Diameter of piston pin bore, in (mm) ...................... 1.2495-1.2500 (31.737-31.750)

Piston Rings

Top compression ring type ...................... Cast iron, chrome plate
Second compression ring type ...................... Cast iron, plain faced
Third compression ring type ...................... Laminated spring steel rings
Top oil control ring type ...................... Laminated spring steel rings
Lower oil control ring type ...................... Cast iron, slotted
Top compression ring groove width, in (mm) ...................... 0.0957-0.0967 (0.243-0.246)
Second compression ring groove width, in (mm) ...................... 0.0957-0.0967 (0.243-0.246)
Third compression ring groove width, in (mm) ...................... 0.127-0.128 (0.323-0.325)
Top oil control ring groove width, in (mm) ...................... 0.252-0.253 (0.640-0.643)
Lower oil control ring groove width, in (mm) ...................... 0.252-0.253 (0.640-0.643)
Top compression ring width, in (mm) ...................... 0.0928-0.0938 (0.236-0.238)
Second compression ring width, in (mm) ...................... 0.0928-0.0938 (0.236-0.238)
Third compression ring width, in (mm) ...................... 0.03125 (0.794) Nominal
Lower oil control ring width, in (mm) ...................... 0.249-0.250 (0.632-0.635)
Top compression ring groove clearance, in (mm) ...................... 0.0019-0.0039 (0.048-0.099)
Second compression ring groove clearance, in (mm) ...................... 0.0019-0.0039 (0.048-0.099)
Lower oil control ring groove clearance, in (mm) ...................... 0.002-0.004 (0.051-0.102)
Top compression ring gap, in (mm) ...................... 0.010-0.015 (0.254-0.381)
Second compression ring gap, in (mm) ...................... 0.009-0.013 (0.229-0.330)
Third compression ring gap, in (mm) ...................... 0.008-0.010 (0.203-0.254)
Top oil control ring gap, in (mm) ...................... 0.018-0.037 (0.457-0.940)
Lower oil control ring gap, in (mm) ...................... 0.009-0.013 (0.229-0.330)

Piston Pins

Piston pin type ...................... Fully floating
Length, in (mm) ...................... 2.961-2.965 (75.2 to 75.3)
Outside diameter, in (mm) ...................... 1.24975-1.2500 (31.744-31.75)
Clearance in piston, in (mm) ...................... 0.00025-0.0005 (0.0064-0.0127)
Clearance in small end bore, in (mm) ...................... 0.0005-0.00175 (0.0127-0.0445)
Method of retention ...................... End circlips

Cylinder Head and Valves

Valve clearance (inlet and exhaust), in (mm) ...................... 0.010 (0.254)
Valve head diameter (inlet), in (mm) ...................... 1.532-1.536 (38.913-39.014)
Valve head diameter (exhaust), in (mm) ...................... 1.313-1.317 (33.350-33.452)
Valve stem diameter (inlet and exhaust), in (mm) ...................... 0.311-0.312 (7.899-7.925)
Valve length (inlet and exhaust), in (mm) ...................... 4.486-4.514 (113.95-114.66)
Angle of valve head, degrees ...................... 45
Angle of valve seat in cylinder head, degrees ...................... 44
Length of valve guide, in (mm) ...................... 2.59275-2.59475 (65.856-65.997)
Valve guide internal diameter, in (mm) ...................... 0.314-0.3155 (7.976-8.014)
Valve guide outside diameter, in (mm) ...................... 0.5005-0.501 (12.713-12.72)
Stem to guide clearance, in (mm) ...................... 0.002-0.0045 (0.051-0.114)
Valve depth in cylinder head (new), in (mm) ...................... 0.059-0.087 (1498-2.210)
Valve depth in cylinder head (max), in (mm) ...................... 0.140 (3.556)
Free length of valve spring (Inner), in (mm) ...................... 1.365-1.405 (34.671-35.687)
Free length of valve spring (Outer), in (mm) ...................... 1.783-1.803 (45.288-45.796)
Inlet valve timing opens, degrees ...................... 13 before T.D.C.
Inlet valve timing closes, degrees ...................... 43 after B.D.C.
Exhaust valve timing opens, degrees ...................... 46 before B.D.C.
Exhaust valve timing closes, degrees ...................... 10 after T.D.C.
Diameter of tappet stem, in (mm) ...................... 0.62225-0,62375 (15.805-15.843)
Tappet to cylinder head clearance, in (mm) ...................... 0.00075-0,0035 (0.019-0.089)
Rocker shaft length, in (mm) - 12.235-12.265 (310.77-311.53)
Rocker shaft diameter, in (mm) ...................... 0.62225-0.62375 (15.805-15.843)
Clearance between rocker arm and shaft, in (mm) ...................... 0.00075-0.0035 (0.019-0.089)

Connecting Rod

Length between centres, in (mm) ...................... 8.999-9.001 (228.575-228.625)
Big end bore (without liners), in (mm) ...................... 2.3950-2.3955 (60.833-60.846)
Big end bore (with liners), in (mm) ...................... 2.251-2.252 (57.175-57.201)
Undersizes of liners, in (mm) ...................... 0.010 (0.254), 0.020 (0.508), 0.030 (0.762)
Connecting rod big end width, in (mm) ...................... 1.5502-1.5525 (39.375-39.434)
Liner thickness (standard), in (mm) ...................... 0.07175-0.0720 (1.822-1.829)
Clearance on crankpin, in (mm) ...................... 0.002-0.0035 (0.051-0.089)
End-float on crankpin, in (mm) ...................... 0.0095-0.0133 (0.241-0.338)
Small end bore (with bush), in (mm) ...................... 1.2505-1.2515 (31.763-31.788)
Clearance between small end and piston pin, in (mm) ................ 0.0005-0.00175 (0.0127-0.0445)

Crankshaft and Main Bearings

Crankpin journal length, in (mm) ...................... 1.5620-1.5635 (39.675-39.713)
Crankpin journal diameter, in (mm) ...................... 2.2485-2.249 (57.112-57.125)
Crankshaft end-float, in (mm) ...................... 0.00225-0.01025 (0.0572-0.2604)
Rear main bearing thrust washer thickness, in (mm) ...................... 0.123-0.125 (3.124-3.175)
Main bearing liner thickness (standard), in (mm) ...................... 0.08225-0.0825 (2.089-2.096)
Undersizes, in (mm) ...................... 0.010 (0.254), 0.020 (0.508), 0.030 (0.762)
Main bearing journal diameter, in (mm) ...................... 2.7485-2.749 (69.812-69.825)
Main bearing journal clearance, in (mm) ...................... 0.0025-0.0045 (0.064-0.114)
Number of teeth on crankshaft gear ...................... 25
Effective diameter of crankshaft pulley, in (mm) ...................... 5.21875 (132.556)
Crankshaft pulley fit, in (mm) ...................... 0.00025-0.00175 (0.0064-0.0445)
Crankshaft gear fit, in (mm) ...................... 0.001 (0.025)

Idler Gear

Number of teeth on idler gear ...................... 90
Internal diameter of gear, in (mm) ...................... 2.125-2.1266 (53.975-54.016)
Diameter of idler gear spigot, in (mm) ...................... 2.123-2.1238 (53.924-53.945)
Clearance between gear and spigot, in (mm) ...................... 0.0012-0.0036 (0.030-0.091)

Camshaft

Camshaft drive ...................... Gear
Maximum cam lift, in (mm) ...................... 0.30955-0.31555 (7.863-8.015)
Maximum valve lift, in (mm) ...................... 0.348 (8.84)
Journal diameter front, in (mm) ...................... 1.869-1.870 (47.473-47.498)
Journal diameter centre, in (mm) ...................... 1.859-1.860 (47.219-47.244)
Journal diameter rear, in (mm) ...................... 1.839-1.840 (46.711-46.736)
Bearing clearance, in (mm) ...................... 0.004-0.008 (0.102-0.203)
Number of teeth on camshaft gear ...................... 50
Backlash (all timing gears), in (mm) ...................... 0.003-0.006 (0.076-0.152)

Flywheel

Flywheel outside diameter, in (mm) ...................... 15.5 (393.7)
Flywheel run-out clutch face (max T.I.R.), in (mm) ...................... 0.001 (0.025)
Flywheel run-out outside diameter (max T.I.R.), in (mm) ...................... 0.012 (0.305)
Method of flywheel retention ...................... Spigot and six set-screws
Number of teeth on starter ring gear ...................... 122
Method of starter ring gear retention ...................... 6 cross-headed screws

Fuel System

Fuel pump plunger stroke/diameter, in (mm) ...................... 0.277/0.237 (7.0/6.0)
Lubrication ...................... Self-lubricating after initial filling
Camshaft end-float, in (mm) ...................... 0.002-0.006 (0.051-0.152)
Camshaft end-float shims, in (mm) ...................... 0.004/0.008 (0.1/0.2)
Phasing tolerance, deg ...................... 1 (pump) between elements
Plunger head clearance, in (mm) ...................... 0.031-0.051 (0.8-1.3)
Plunger arm shims, in (mm) ...................... 0.009 (0.229)
Fuel tnjector number of spray holes ...................... 2
Fuel tnjector diameter of spray holes, in (mm) ...................... 0.013 (0.35)
Back leak test ........ Tune for pressure to fall from 125 to 90 bar should be between 6 sec, and 45 sec
Injector pipes inner diameter, in (mm) ...................... 0.06 (1.50)
Injector pipes outer diameter, in (mm) ...................... 0.233-0.238 (5.9-6.06)
Governor maximum speed under load, rpm ...................... 2000
Governor idling speed, rpm ...................... 550-600

Lubrication System

Oil pump shaft diameter, in (mm) ...................... 0.498-0.4985 (12.649-12.662)
Diameter of shaft bore in pump housing, in (mm) ...................... 0.500-0.501 (12.700-12.725)
Oil pump shaft clearance, in (mm) ...................... 0.0015-0.003 (0.038-0.076)
Idler gear shaft diameter, in (mm) ...................... 0.65475-0.65535 (16.631-16.646)
Idler gear bush internal diameter, in (mm) ...................... 0.6562-0.6572 (16.667-16.693)
Oil pump shaft clearance, in (mm) ...................... 0.00085-0.00245 (0.022-0.062)
Fit of idler gear shaft in pump body, in (mm) ...................... 0.00025-0.00185 (0.0064-0.047)
Clearance between drive rotor and driven rotor, in (mm) ...................... 0.006 (0.152)
Clearance between drive rotor and body, in (mm) ...................... 0.010 (0.254)
End-float of rotors ...................... 0.003 (0.076)

Cooling System

Fan diameter (up to 90F/32.2С), in (mm) ...................... 15 (381), 2 blade
Fan diameter (above 90F/32.2С), in (mm) ...................... 15 (381), 4 blade
Water pump shaft bearing fit in pump body, in (mm) ...................... 0.0001-0.0011 (0.0025-0.0279)
Water pump clearance between impeller blades and body, in (mm) ....... 0.005-0.020 (0.127-0.508)
Pump shaft fit in impeller bore, in (mm) ...................... 0.00045-0.0017 (0.0114-0.0432)
Pump pulley fit on pump shaft, in (mm) ...................... 0.0015-0.0028 (0.0381-0.0711)
Thermostat (Opening temperature), F (C) ...................... 56-65 (73.9-68.8)
Thermostat (Fully open temperature) ...................... 85 (85)

Perkins F3.144 Tightening Torque Specs

Cylinder head nuts, lb-ft (Nm) ...................... 55-60 (74.8-81.6)
Main bearing cap bolts, lb-ft (Nm) ...................... 90-95 (122.4-129.2)
Big end cap nuts (Cadmium plated), lb-ft (Nm) ...................... 50-55 (68-74.8)
Big end cap nuts (Uplated), lb-ft (Nm) ...................... 65-70 (88.4-95.2)
Flywheel bolts, lb-ft (Nm) ...................... 75 (101.9)
Delivery valve holders, lb-ft (Nm) ...................... 30 (40.8)
Fuel pump drive gear adaptor retaining nut, lb-ft (Nm) ...................... 45 (61.2)
Oil filter for centre bolt, lb-ft (Nm) ...................... 10 (13.6)
Nozzle nut, lb-ft (Nm) ...................... 60-75 (81.6-101.9)