Perkins 4.108 Specifications
| Engine Model: Perkins 4.108 |
| Engine Type: 4-cycle vertical 4-cylinder indirect injection liquid-cooled diesel |
| Total Displacement: 107.4 cu.in (1.76 L) |
| Rated Engine Power: 37-45 Hp (30-36 kW) at 3000-3600 rpm |
| Aspiration Type: Naturally aspirated |
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Engine Model ............... Perkins 4.108
Engine Type ............... 4-Stroke four-cylinder liquid-cooled diesel
Number of Cylinders ............... 4
Cylinder Arrangement ............... In-line
Engine Bore, in (mm) ............... 3.13 (79.4)
Engine Stroke, in (mm) ............... 3.50 (88.9)
Displacement, cu.in (L) ............... 107.4 (1.76)
Aspiration Type ............... Naturally aspirated
Rated Engine Power, hp (kW) ............... 37-45 (30-36)
Rated Engine Speed, rpm ............... 3000-3600
Compression Ratio ............... 22.0:1
Firing Order ............... 1-3-4-2
Lubrication System ............... Forced with gear pump
Engine Oil Pump ............... Rotor Type
Oil Filter Type ............... Full flow, paper canister element
Cooling System ............... Liquid Cooled
Water Pump Type ............... Centrifugal, belt driven
Electrical System Rating, Volts ............... 12
Fuel System ............... Indirect injection
Injection Pump Type ............... DPA
Injection Pump Model ............... CAV
Lift Pump Type ............... Diaphragm
Lift Pump Drive Method ............... Eccentric on camshaft
Final Fuel Filter Type ............... Paper element
Overall Width, in (mm) ............... 21.2 (538)
Overall Height, in (mm) ............... 25.2 (639)
Overall Depth, in (mm) ............... 20.1 (508)
Net Weight, lbs (kg) ............... 319 (145)
Cylinder Bore Inside Diameter (Max) ............... 3.1307 in (79.520 mm)
Cylinder Liner Outside Diameter ............... 3.249-3.250 in (82.525-82.550 mm)
Crankshaft Journal Outside Diameter (No.1 and 2) ............... 2.248-2.2485 in (57.099-57.112 mm)
Crankshaft Journal Outside Diameter (No.3) ............... 2.2475-2.248 in (57.086-57.099 mm)
Crankpin Outside Diameter ............... 1.9993-2.0001 in (50.78-50.80 mm)
Crankshaft End Play ............... 0.002-0.015 in (0.0508-0.381 mm)
Crankshaft Bearing Outside Diameter ............... 2.3955 in (60.846 mm)
Crankshaft Bearing Inside Diameter ............... 2.2505-2.2515 in (57.163-57.188 mm)
Crankshaft Bearing Running Clearance (No.1 and 2) ............... 0.002-0.0035 in (0.051-0.089 mm)
Crankshaft Bearing Running Clearance (No.3) ............... 0.0025-0.004 in (0.063-0.102 mm)
Connecting Rod Small End Bush Outside Diameter ............... 1.221-1.222 in (31.013-31.039 mm)
Connecting Rod Small End Bush to Piston Pin Clearance ............... 0.00045-0.0007 in (0.0114-0.0178 mm)
Connecting Rod Big End Bore Inside Diameter ............... 2.146-2.1465 in (54.508-54.521 mm)
Connecting Rod Small End Bore Inside Diameter ............... 1.21875-1.21975 in (30.956-30.981 mm)
Connecting Rod End Play ............... 0.0065-0.0105 in (0.165-0.267 mm)
Connecting Rod Bearing Outside Diameter ............... 2.1465 in (54.521 mm)
Connecting Rod Bearing Inside Diameter ............... 2.0015-2.0025 in (50.838-50.863 mm)
Connecting Rod Bearing Running Clearance ............... 0.0015-0.003 in (0.038-0.076 mm)
Cylinder Head Overall Length ............... 20.000 in (508.000 mm)
Cylinder Head Overall Depth ............... 2.617-2.633 in (66.472-66.878 mm)
Cylinder Head Bore for Guide ............... 0.4995-0.5005 in (12.687-12.713 mm)
Intake Valve Guide Inside Diameter ............... 0.3141-0.3155 in (7.978-8.014 mm)
Intake Valve Guide Outside Diameter ............... 0.5021-0.5026 in (12.753-12.766mm)
Intake Valve Guide Overall Length ............... 2.130 in (54.102 mm)
Exhaust Valve Guide Inside Diameter ............... 0.3141-0.3155 in (7.978-8.014 mm)
Exhaust Valve Guide Outside Diameter ............... 0.5021-0.5026 in (12.753-12.766 mm)
Exhaust Valve Guide Overall Length ............... 2.440 in (61.98 mm)
Intake Valve Stem Diameter ............... 0.312-0.313 in (7.925-7.950 mm)
Intake Valve Stem To Guide Clearance ............... 0.0011 -0.0035 in (0.028-0.089 mm)
Intake Valve Head Diameter ............... 1.410-1.414 in (35.814-35.916 mm)
Valve Seat Angle ............... 45 deg
Intake Valve Face Angle ............... 45 deg
Intake Valve Overall Length ............... 4.592-4.608 in (116.637-117.043 mm)
Exhaust Valve Stem Diameter ............... 0.3115-0.3125 in (7.912-7.937 mm)
Exhaust Valve Stem To Guide Clearance ............... 0.0016-0.004 in (0.041-0.102 mm)
Exhaust Valve Head Diameter ............... 1.191-1.195 in (30.251-30.353 mm)
Exhaust Valve Face Angle ............... 45 deg
Exhaust Valve Overall Length ............... 4.600-4.616 in (116.840-117.246 mm)
Valve Spring Free Length ............... 1.780 in (45.212 mm)
Camshaft Journal Outside Diameter (No.1) ............... 1.791-1.792 in (45.491-45.517 mm)
Camshaft Journal Running Clearance (No.1) ............... 0.002-0.0045 in (0.051-0.114 mm)
Camshaft Journal Outside Diameter (No.2) ............... 1.781-1.782 in (45.237-45.263 mm)
Camshaft Journal Running Clearance (No.2) ............... 0.002-0.006 in (0.051-0.152 mm)
Camshaft Journal Outside Diameter (No.3) ............... 1.773-1.774 in (45.034-45.060 mm)
Camshaft Journal Running Clearance (No.3) ............... 0.002-0.005 in (0.051-0.127 mm)
Cam Height ............... 0.266 in (6.766 mm)
Piston Pin Bore Inside Diameter............... 1.06255-1.06275 in (26.989-26.994 mm)
Piston Pin Outside Diameter ............... 1.0625-1.0627 in (26.987-26.993 mm)
Piston Pin Length ............... 2.673-2.687 in (67.894-68.250 mm)
Top Ring Groove Width ............... 0.0805-0.0815 in (2.045-2.070 mm)
Second Ring Groove Width ............... 0.0645-0.0655 in (1.638-1.664 mm)
Third Ring Groove Width ............... 0.0645-0.0655 in (1.638-1.664 mm)
Fourth Ring Groove Width ............... 0.126-0.127 in (3.200-3.225 mm)
Fifth Ring Groove Width ............... 0.190-1.191 in (4.826-4.851 mm)
Top Ring Groove Side Clearance ............... 0.0024-0.0044 in (0.061-0.112 mm)
Second Ring Groove Side Clearance ............... 0.002-0.004 in (0.051-0.102 mm)
Third Ring Groove Side Clearance ............... 0.002-0.004 in (0.051-0.102 mm)
Fifth Ring Groove Side Clearance ............... 0.0025-0.0045 in (0.063-0.114 mm)
Top Ring End Gap ............... 0.009-0.014 in (0.229-0.356 mm)
Second Ring End Gap ............... 0.009-0.014 in (0.229-0.356 mm)
Third Ring End Gap ............... 0.009-0.014 in (0.229-0.356 mm)
Fifth Ring End Gap ............... 0.009-0.014 in (0.229-0.356 mm)
Cylinder Bore Inside Diameter (Max), in (mm) ............... 3.1307 (79.520)
Cylinder Head (Max. Out of Flatness), in (mm) ............... 0.003 (0.08)
Intake Valve Clearance, in (mm) ............... 0.012 (0.30)
Exhaust Valve Clearance, in (mm) ............... 0.012 (0.30)
Lubrication Pressure, psi (kPa) ............... 30-60 (207-414)
Relief Valve Pressure Setting, psi (kPa) ............... 50-65 (345-448)
Engine Oil Type ............... SAE 30 or 15W-40
Oil Classification ............... API Service CC, CD, or CF
Oil Capacity, qts (L) ............... 5.1 (4.8)
Coolant Capacity ............... 7.8 (7.4)
Oil Filter Part Number ............... 2654403
Fuel Filter Part Number ............... 26561117
Change Engine Oil ............... Every 100 hours
Change Oil Filter Element ............... Every 100 hours
Check Belt Tension ............... Every 100 hours
Replace Final Fuel Filter ............... Every 400 hours
Check and Adjust Valve Clearance ............... Every 400 hours
Service Atomiser ............... Every 400 hours
Cylinder Head Nuts, lb-ft (Nm) ............... 60 (81)
Connecting Rod Bolts, lb-ft (Nm) ............... 42 (57)
Main Bearing Bolts, lb-ft (Nm) ............... 85 (115)
Flywheel Bolts, lb-ft (Nm) ............... 60 (81)
Idler Gear Hub Bolts, lb-ft (Nm) ............... 36 (49)
Crankshaft Pulley Bolt, lb-ft (Nm) ............... 150 (203)
Atomiser Securing Nuts, lb-ft (Nm) ............... 12 (16)
Fuel High Pressure Pipe Nuts, lb-ft (Nm) ............... 15 (20)
Dynamo Pulley Nut, lb-ft (Nm) ............... 20 (27)
Alternator Pulley Nut, lb-ft (Nm) ............... 30 (41)
Thermostart Unit, lb-ft (Nm) ............... 10 (13)
Thermostart Insulating Adaptor, lb-ft (Nm) ............... 10 (13)
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