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Shibaura S773L Engine

General Technical Data

Engine Specifications

Engine Model ............... Shibaura S773L
Engine Type ............... 4-cycle inline 3-cylinder indirect injection liquid-cooled diesel
Number of Cylinders ............... 3
Cylinder Arrangement ............... In-line vertical
Engine Bore, in (mm) ............... 3.031 (77.0)
Engine Stroke, in (mm) ............... 3.189 (81.0)
Displacement, cu.in (L) ............... 69.01 (1.131)
Gross Engine Power, hp (kW) ............... 23.2-24.3 (17.3-18.1) at 2600-3000 rpm
Net Engine Power, hp (kW) ............... 22.0 (16.4) at 2800 rpm
Minimum Power Output, hp (kW) ............... 15.0 (11.2) at 2200 rpm
Maximum Power Output, hp (kW) ............... 24.7 (18.4) at 3000 rpm
Rated Engine Speed, rpm ............... 2600-3000
Peak Torque ............... 47.9-58.3 Nm (35.3-43.0 lb-ft) at 1600-2000 rpm
High Idle Speed, rpm ............... 3150-3250
Low Idle Speed, rpm ............... 900-1000
Aspiration Type ............... Naturally Aspirated
Compression Ratio ............... 22.5:1-23.0:1
Firing Order ............... 1-3-2
Crankcase Ventilation ............... Closed circuit breather routing to intake manifold
Direction of Rotation ............... Counterclockwise viewed from flywheel
Cylinder Block Material ............... Cast iron
Cylinder Head Material ............... Cast iron
Combustion Chamber ............... Swirl chamber indirect injection
Lubrication System ............... Forced pressure feed
Oil Pump Type ............... Trochoid gear-driven
Oil Filter Type ............... Full-flow spin-on cartridge
Cooling System ............... Forced liquid circulation centrifugal pump
Water Pump Type ............... Belt-driven centrifugal impeller
Air Cleaner Type ............... Dry element dual stage filter cartridge
Emission Certification ............... US EPA Tier 4 Final compliance window
Starting System Type ............... Electric starter motor engagement
Electrical System ............... 12V
Alternator Capacity ............... 40A

Fuel System

Fuel Injection Pump Type ............... Bosch IDI inline cassette mini type pump
Fuel Injection Pump Manufacturer ............... Bosch licensed Shibaura internal production unit
Fuel Injection Nozzle Type ............... Throttle type needle mechanism injection pin
Injection Nozzle Opening Pressure, psi (MPa) ............... 1707-1849 (11.77-12.75)
Maximum Injection Pressure, psi (MPa) ............... 2842-3128 (19.60-21.56)
Fuel Injection Timing, degrees ............... 19-21 BTDC
Governor Type ............... Mechanical centrifugal all-speed control weight governor
Governor Regulation Class ............... ISO 8528 Class G2 performance matching
Fuel Feed Pump Type ............... Mechanical diaphragm style positive displacement pump
Fuel Filter Type ............... Spin-on element cartridge with secondary water separator
Fuel Transfer Pump Delivery Pressure, psi (kPa) ............... 2.9-4.3 (20.0-29.6)
Fuel Injection Pipe Outer Diameter, in (mm) ............... 0.236 (6.00)
Fuel Injection Pipe Inner Diameter, in (mm) ............... 0.078 (2.00)
Fuel Leak-off Line Pipe Diameter, in (mm) ............... 0.157 (4.00)
Maximum Allowable Fuel Inlet Restriction, inHg (kPa) ............... 3.94 (13.33)
Maximum Allowable Fuel Return Restriction, inHg (kPa) ............... 5.91 (20.00)
Recommended Fuel Grade ............... Ultra Low Sulfur Diesel ASTM D975 No. 2-D S15
Alternative Fuel Specification ............... EN 590 standard compliance certified oil
Cold Weather Fuel Specification ............... ASTM D975 No. 1-D low temperature fluid blend
Fuel Consumption Rate at Rated Speed, gal/hr (L/hr) ............... 1.18-1.45 (4.46-5.48)
Fuel Consumption Rate at Mid Load, gal/hr (L/hr) ............... 0.62-0.79 (2.34-2.99)
Specific Fuel Consumption, lb/hp-hr (g/kW-hr) ............... 0.411 (250.0) at peak torque curve

Dimensions and Weight

Overall Length, in (mm) ............... 19.3 (490)
Overall Width, in (mm) ............... 15.7 (400)
Overall Height, in (mm) ............... 22.0 (560)
Dry Weight, lbs (kg) ............... 192 (87)
Wet Weight, lbs (kg) ............... 207 (94)

Maintenance Data

Service Information

Standard Compression Pressure, psi (MPa) ............... 426-469 (2.94-3.23)
Minimum Allowable Compression Pressure, psi (MPa) ............... 355 (2.45)
Compression Pressure Variance across Cylinders, psi (MPa) ............... 28.4 (0.196)
Oil Pressure at Rated Speed, psi (kPa) ............... 28.4-56.8 (196.0-392.0)
Oil Pressure at Low Idle Speed, psi (kPa) ............... 9.9 (68.6)
Thermostat Valve Cracking Opening Temperature, F (C) ............... 156-163 (69.0-73.0)
Thermostat Full Open Extension Temperature, F (C) ............... 185 (85.0)
Maximum Allowable Coolant Temperature, F (C) ............... 230 (110.0)
Drive Belt Deflection under 22 lb Force, in (mm) ............... 0.39-0.47 (10.0-12.0)
Intake Valve Clearance (Cold), in (mm) ............... 0.0078 (0.20)
Exhaust Valve Clearance (Cold), in (mm) ............... 0.0078 (0.20)

Engine Oil and Coolant

Engine Oil Type .................. SAE 10W-30, SAE 15W-40
API Service Classifications ......................... CH-4 or CI-4
Engine Oil Capacity with Filter, qts (L) ............... 3.48 (3.30)
Engine Oil Capacity (Minimum Level), qts (L) ............... 2.53 (2.40)
Cooling System Capacity, qts (L) ............... 3.91 (3.70)

Service Intervals

Change engine oil ............... Every 200 hours
Replace oil filter ............... Every 200 hours
Replace fuel filter ............... Every 400 hours
Service air filter ............... Every 100 hours
Replace air filter ............... Every 1000 hours
Change coolant ............... Every 2000 hours
Valve-lash adjustment ............... Every 500 hours
Check fuel system ............... Every 1000 hours
Compression test ............... Every 1000 hours
Clean radiator fin ............... Every 100 hours
Belt inspection ............... Every 100 hours

Service Specifications

Cylinder Bore Inside Diameter, in (mm) ............... 3.0314-3.0322 (77.000-77.019)
Cylinder Bore Maximum Out-of-Round, in (mm) ............... 0.0078 (0.200)
Connecting Rod Small End Bushing I.D, in (mm) ............... 0.8271-0.8279 (21.010-21.030)
Connecting Rod Big End Bore I.D, in (mm) ............... 1.8503-1.8511 (47.000-47.020)
Connecting Rod Bearing Clearance, in (mm) ............... 0.0013-0.0033 (0.035-0.085)
Crankshaft Main Journal Diameter, in (mm) ............... 2.0460-2.0468 (51.970-51.990)
Crankpin Journal Diameter, in (mm) ............... 1.7311-1.7318 (43.970-43.990)
Crankshaft Main Bearing Clearance, in (mm) ............... 0.0013-0.0035 (0.035-0.090)
Crankshaft End Playd, in (mm) ............... 0.0019-0.0068 (0.050-0.175)
Piston Skirt Outer Diameter, in (mm) ............... 3.0291-3.0299 (76.940-76.960)
Piston to Cylinder Bore Clearance, in (mm) ............... 0.0015-0.0031 (0.040-0.079)
Piston Pin Bore Inside Diameter, in (mm) ............... 0.8267-0.8271 (21.000-21.008)
Piston Pin Outer Diameter, in (mm) ............... 0.8265-0.8267 (20.994-21.000)
Top Ring Side Clearance, in (mm) ............... 0.0023-0.0043 (0.060-0.110)
Second Ring Side Clearance, in (mm) ............... 0.0019-0.0035 (0.050-0.090)
Oil Ring Side Clearance, in (mm) ............... 0.0011-0.0027 (0.030-0.070)
Top Ring End Gap, in (mm) ............... 0.0078-0.0137 (0.200-0.350)
Second Ring End Gap, in (mm) ............... 0.0078-0.0157 (0.200-0.400)
Oil Ring End Gap, in (mm) ............... 0.0078-0.0157 (0.200-0.400)
Cylinder Head Bottom Surface Flatness, in (mm) ............... 0.0019 (0.050)
Cylinder Block Top Deck Flatness Distortion, in (mm) ............... 0.0019 (0.050)
Intake Valve Stem Outer Diameter, in (mm) ............... 0.2342-0.2350 (5.950-5.970)
Exhaust Valve Stem Outer Diameter, in (mm) ............... 0.2330-0.2340 (5.920-5.940)
Valve Guide Inside Diameter, in (mm) ............... 0.2362-0.2367 (6.000-0.012)
Intake Valve Stem to Guide Clearance, in (mm) ............... 0.0011-0.0024 (0.030-0.062)
Exhaust Valve Stem to Guide Clearance, in (mm) ............... 0.0023-0.0036 (0.060-0.092)
Intake Valve Recess Depth, in (mm) ............... 0.0275-0.0374 (0.700-0.950)
Exhaust Valve Recess Depth, in (mm) ............... 0.0275-0.0374 (0.700-0.950)
Valve Seat Contact Width, in (mm) ............... 0.0591-0.0787 (1.500-2.000)
Valve Seat Angle, degrees ............... 45
Valve Spring Free Lenght, in (mm) ............... 1.3779 (35.000)
Camshaft Main Journal Diameter, in (mm) ............... 1.5732-1.5740 (39.960-39.980)
Camshaft Bearing Oil Clearance, in (mm) ............... 0.0007-0.0035 (0.020-0.090)
Intake Cam Lobe Height, in (mm) ............... 1.0421-1.0440 (26.470-26.520)
Exhaust Cam Lobe Height, in (mm) ............... 1.0421-1.0440 (26.470-26.520)
Rocker Arm Shaft Bore Inside Diameter, in (mm) ............... 0.4724-0.4731 (12.000-12.018)
Rocker Arm Pin Shaft Outer Diameter, in (mm) ............... 0.4711-0.4718 (11.966-11.984)
Rocker Arm Shaft Oil Clearance, in (mm) ............... 0.0006-0.0020 (0.016-0.052)
Crankshaft Gear to Idler Gear Backlash, in (mm) ............... 0.0011-0.0051 (0.030-0.130)
Camshaft Gear to Idler Gear Backlash, in (mm) ............... 0.0011-0.0051 (0.030-0.130)
Injection Pump Gear to Idler Gear Backlash, in (mm) ............... 0.0011-0.0051 (0.030-0.130)

Tightening Torques

Cylinder Head Bolts (Stage 1), lb-ft (Nm) ............... 25.3-28.9 (34.3-39.2)
Cylinder Head Bolts (Stage 2), lb-ft (Nm) ............... 50.6-54.2 (68.6-73.5)
Cylinder Head Bolts (Stage 3), lb-ft (Nm) ............... 72.3-75.9 (98.0-103.0)
Connecting Rod Cap Nut, lb-ft (Nm) ............... 36.1-39.7 (49.0-53.9)
Crankshaft Main Bearing Cap Bolt, lb-ft (Nm) ............... 72.3-79.5 (98.0-107.8)
Flywheel Retention Mounting Bolts, lb-ft (Nm) ............... 43.4-47.0 (58.8-63.7)
Crankshaft Front Drive Pulley Bolt, lb-ft (Nm) ............... 86.8-93.9 (117.6-127.4)
Camshaft Drive Gear Lock Bolt, lb-ft (Nm) ............... 43.4-50.6 (58.8-68.6)
Rocker Arm Shaft Support Block Bolts, lb-ft (Nm) ............... 20.2-25.3 (27.4-34.3)
Idler Gear Pin Shaft Assembly Anchor Bolt, lb-ft (Nm) ............... 20.2-25.3 (27.4-34.3)
Valve Rocker Arm Chamber Seal Nut Caps, lb-ft (Nm) ............... 5.7-8.6 (7.8-11.7)
Fuel Cassette Pump Housing Base Bolts, lb-ft (Nm) ............... 14.4-21.7 (19.6-29.4)
Fuel Injector Assembly Fuel Cylinder Head Cap Nut, lb-ft (Nm) ............... 43.4-50.6 (58.8-68.6)
Fuel Injection Delivery High Pressure Union Nuts, lb-ft (Nm) ............... 18.0-21.7 (24.5-29.4)
Fuel Leak-off Bypass Banjo Union Bolt, lb-ft (Nm) ............... 7.2-10.8 (9.8-14.7)
Glow Plug Terminal Body Cylinder Head, lb-ft (Nm) ............... 10.8-14.4 (14.7-19.6)
Glow Plug Upper Small Electrical Connector Nut, lb-ft (Nm) ............... 1.1-1.4 (1.5-2.0)
Oil Pressure Sender Sensor Switch, lb-ft (Nm) ............... 10.8-14.4 (14.7-19.6)
Coolant Thermostat Housing Mounting Screws, lb-ft (Nm) ............... 14.4-18.0 (19.6-24.5)
Water Pump Shell Mounting Bolts, lb-ft (Nm) ............... 14.4-18.0 (19.6-24.5)
Exhaust Manifold Core Engine Block Mounting Nuts, lb-ft (Nm) ............... 18.0-21.7 (24.5-29.4)
Intake Manifold Air Intake Distribution Bolts, lb-ft (Nm) ............... 14.4-18.0 (19.6-24.5)
Oil Sump Base Pan Sheet Metal Bolts, lb-ft (Nm) ............... 7.2-10.8 (9.8-14.7)
Oil Pan Bottom Drain Plug, lb-ft (Nm) ............... 25.3-32.5 (34.3-44.1)
Oil Pressure Regulator Bypass Relief Valve Plug, lb-ft (Nm) ............... 28.9-36.1 (39.2-49.0)
Oil Pump Cover Plate Counter-sunk Screw, lb-ft (Nm) ............... 5.0-7.2 (6.8-9.8)
Crankcase Breathing Chamber Separator Box Screws, lb-ft (Nm) ............... 3.6-5.0 (4.9-6.8)
Flywheel Housing Adapter to Crankcase Block Studs, lb-ft (Nm) ............... 32.5-39.7 (44.1-53.9)
Timing Gear Front Cover Housing Mating Screws, lb-ft (Nm) ............... 14.4-18.0 (19.6-24.5)
Alternator Pivot Mount Support Bracket Long Bolt, lb-ft (Nm) ............... 36.1-43.4 (49.0-58.8)
Alternator Slotted Tension Adjuster Link Bolt, lb-ft (Nm) ............... 14.4-18.0 (19.6-24.5)
Starter Motor Flange Rear Mounting Nuts, lb-ft (Nm) ............... 32.5-39.7 (44.1-53.9)
Engine Support Front Cushion Rubber Base Bolts, lb-ft (Nm) ............... 36.1-43.4 (49.0-58.8)
Engine Support Rear Rubber Isolation Damper Nut, lb-ft (Nm) ............... 36.1-43.4 (49.0-58.8)
Fan Blade Water Pump Driving Pulley Screws, lb-ft (Nm) ............... 7.2-10.8 (9.8-14.7)

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