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Yanmar 3T90T-J Engine

General Technical Data

Engine Specifications

Engine Model ............... Yanmar 3T90T-J
Engine Type ............... 4-cycle inline 3-cylinder turbocharged liquid-cooled diesel
Number of Cylinders ............... 3
Cylinder Arrangement ............... In-line
Engine Bore, in (mm) ............... 3.54 (90.0)
Engine Stroke, in (mm) ............... 3.54 (90.0)
Displacement, cu.in (L) ............... 105 (1.717)
Rated Engine Power, hp (kW) ............... 37 (27.6)
Rated Engine Speed, rpm ............... 2400
Peak Torque ............... 87 lb-ft (118 Nm) at 1600 rpm
Idle Speed ............... 800-900 rpm
Maximum No-Load Speed, rpm ............... 2600
Minimum Idling Speed, rpm ............... 750
Aspiration Type ............... Turbocharged
Operating Speed ............... 2400 rpm
Compression Ratio ............... 20.4:1
Firing Order ............... 1-3-2
Cylinder Block Type ............... Cast iron mono-block
Cylinder Head Type ............... Cast iron cross-flow
Valve Mechanism Layout ............... Overhead valve pushrod operated
Combustion Chamber ............... Spherical swirl pre-combustion chamber type
Number of Valves per Cylinder ............... 2
Crankcase Ventilation Type ............... Closed breather system
Lubrication System ............... Forced full-pressure circulation
Oil Pump Type ............... Trochoid rotor gear-driven pump
Oil Filter Type ............... Full-flow spin-on cartridge
Cooling System ............... Liquid-cooled with radiator system
Water Pump Type ............... Belt-driven centrifugal impeller
Air Cleaner Type ............... Dry dual paper elements
Starting System ............... Electric starter motor
Electrical System ............... 12V negative ground system
Alternator Capacity ............... 12V 35A
Starter Power, hp (kW) ............... 2.0 (1.5)

Fuel System

Fuel Injection Pump Type ............... Yanmar inline Plunger type Bosch-A matching design
Fuel Injection Method ............... Indirect injection via swirl chamber
Fuel Injection Pump Drive ............... Gear train driven from crankshaft idler
Fuel Feed Pump Type ............... Mechanical diaphragm type pump
Fuel Injection Nozzle Type ............... Throttle type pin nozzle nozzle holder system
Fuel Injection Opening Pressure, psi (MPa) ............... 1990-2133 (13.7-14.7)
Fuel Injection Timing, deg ............... 16-18 BTDC
Governor Type ............... Mechanical centrifugal all-speed governor
Fuel Filter Type ............... Spin-on element paper filter with water separator cartridge
Fuel Recommendation ............... Diesel light oil No. 2-D ASTM standard
Fuel Minimum Cetane Rating ............... 45
Fuel Consumption Rate, lb/hp-hr (g/kW-h) ............... 0.411 (250) at rated power
Fuel Delivery Pressure, psi (kPa) ............... 2.9-4.3 (20-30)
Maximum Fuel Pump Suction Head, ft (m) ............... 3.3 (1.0)
Nozzle Cleaning Interval, hours ............... 200
Fuel Pump Spill Timing Method ............... Flow checking via No. 1 high pressure line cylinder
Injection Pump Overflow Valve Opening Pressure, psi (kPa) ............... 14.2 (98)
Plunger Diameter, in (mm) ............... 0.236 (6.0)
Plunger Stroke, in (mm) ............... 0.275 (7.0)
Delivery Valve Variable Volume, cu.in (cu.mm) ............... 0.0015 (25)
Governor Linkage Play Adjustment, in (mm) ............... 0.004-0.012 (0.1-0.3)
Maximum Leak-Back Volume, drops/min ............... 10 at peak injection pressure
Fuel Tank Base Return Line Diameter, in (mm) ............... 0.25 (6.35)
Fuel Injection Pipe Outer Diameter, in (mm) ............... 0.236 (6.0)
Fuel Injection Pipe Inner Diameter, in (mm) ............... 0.078 (2.0)
Fuel System Air Bleeding Method ............... Manual via priming pump and vent screws

Dimensions and Weight

Overall Length, in (mm) ............... 22.8 (580)
Overall Width, in (mm) ............... 18.9 (480)
Overall Height, in (mm) ............... 24.3 (615)
Dry Weight, lbs (kg) ............... 363 (165)
Wet Weight, lbs (kg) ............... 385 (175)

Maintenance Data

Service Information

Standard Compression Pressure, psi (MPa) ............... 412-441 (2.84-3.04)
Minimum Allowable Compression Pressure, psi (MPa) ............... 341 (2.35)
Oil Normal Operating Pressure, psi (kPa) ............... 42.6-56.8 (294-392)
Oil Minimum Idle Pressure, psi (kPa) ............... 11.4 (78.4)
Turbocharger Maximum Boost Pressure, psi (kPa) ............... 6.5 (45)
Radiator Cap Relief Valve Pressure, psi (kPa) ............... 12.8 (88.3)
Thermostat Valve Opening Temperature, F (C) ............... 160 (71)
Thermostat Full Open Temperature, F (C) ............... 185 (85)
V-Belt Tension Deflection Check, in (mm) ............... 0.39-0.55 (10.0-14.0)
Intake Valve Clearance, Cold, in (mm) ............... 0.008 (0.20)
Exhaust Valve Clearance, Cold, in (mm) ............... 0.008 (0.20)

Engine Oil and Coolant

Engine Oil Type .................. SAE 10W-30, SAE 5W-20
API Service Classifications ......................... CD or CE
Engine Oil Capacity with Filter, qt (L) ............... 7.0 (6.6)
Engine Oil Capacity, Pan Only, qt (L) ............... 5.9 (5.6)
Engine Oil Minimum Level, qt (L) ............... 4.2 (4.0)
Cooling System Total Capacity, qt (L) ............... 6.5 (6.2)
Engine Block Coolant Capacity, qt (L) ............... 3.1 (2.9)

Service Intervals

Change engine oil ............... Every 100 hours
Replace oil filter ............... Every 200 hours
Replace fuel filter ............... Every 300 hours
Service air filter ............... Every 100 hours
Replace air filter ............... Every 500 hours
Change coolant ............... Every 1000 hours
Valve-lash adjustment ............... Every 400 hours
Check fuel system ............... Every 600 hours
Compression test ............... Every 800 hours
Belt inspection ............... Every 100 hours

Service Specifications

Cylinder Bore Inner Diameter, in (mm) ............... 3.5433-3.5441 (90.000-90.022)
Crankshaft Main Journal Outer Diameter, in (mm) ............... 2.1642-2.1648 (54.972-54.985)
Crankpin Journal Outer Diameter, in (mm) ............... 1.8886-1.8892 (47.972-47.985)
Crankshaft Journal Out-of-Roundness, in (mm) ............... 0.0007 (0.02)
Crankshaft End Play, in (mm) ............... 0.004-0.010 (0.11-0.25)
Main Bearing Clearance, in (mm) ............... 0.0014-0.0033 (0.038-0.085)
Connecting Rod Small End Bushing I.D, in (mm) ............... 1.0244-1.0251 (26.020-26.038)
Connecting Rod Bearing Clearance, in (mm) ............... 0.0014-0.0031 (0.038-0.080)
Connecting Rod Big End Side Clearance, in (mm) ............... 0.006-0.014 (0.15-0.35)
Thrust Bearing Thickness, in (mm) ............... 0.0763-0.0783 (1.938-1.988)
Crankshaft Thrust Play, in (mm) ............... 0.0157 (0.40)
Piston Skirt Outer Diameter, in (mm) ............... 3.5397-3.5409 (89.910-89.940)
Piston to Cylinder Bore Clearance, in (mm) ............... 0.0031-0.0044 (0.080-0.112)
Piston Pin Bore Inner Diameter, in (mm) ............... 1.0236-1.0241 (26.000-26.013)
Piston Pin Outer Diameter, in (mm) ............... 1.0236-1.0240 (26.000-26.009)
Piston Pin to Pin Bore Clearance, in (mm) ............... -0.0003 to +0.0005 (-0.009 to +0.013)
Piston Pin to Small End Bushing Clearance, in (mm) ............... 0.0004-0.0014 (0.011-0.038)
Top Ring Groove Width, in (mm) ............... 0.0807-0.0815 (2.050-2.070)
Second Ring Groove Width, in (mm) ............... 0.0795-0.0803 (2.020-2.040)
Oil Ring Groove Width, in (mm) ............... 0.1583-0.1591 (4.020-4.040)
Top Ring Side Clearance, in (mm) ............... 0.0027-0.0043 (0.070-0.110)
Second Ring Side Clearance, in (mm) ............... 0.0015-0.0031 (0.040-0.080)
Oil Ring Side Clearance, in (mm) ............... 0.0011-0.0027 (0.030-0.070)
Top Ring End Gap, in (mm) ............... 0.0098-0.0157 (0.25-0.40)
Second Ring End Gap, in (mm) ............... 0.0098-0.0157 (0.25-0.40)
Oil Ring End Gap, in (mm) ............... 0.0078-0.0157 (0.20-0.40)
Cylinder Head Surface Flatness, Limit, in (mm) ............... 0.002 (0.05)
Intake Valve Stem Outer Diameter, in (mm) ............... 0.3130-0.3136 (7.950-7.965)
Exhaust Valve Stem Outer Diameter, in (mm) ............... 0.3126-0.3132 (7.940-7.955)
Intake Valve Guide Inner Diameter, in (mm) ............... 0.3150-0.3156 (8.000-8.015)
Exhaust Valve Guide Inner Diameter, in (mm) ............... 0.3150-0.3156 (8.000-8.015)
Intake Valve Stem to Guide Clearance, in (mm) ............... 0.0014-0.0025 (0.035-0.065)
Exhaust Valve Stem to Guide Clearance, in (mm) ............... 0.0017-0.0029 (0.045-0.075)
Valve Seat Angle, deg ............... 45
Valve Sinkage Depth, in (mm) ............... 0.027-0.035 (0.70-0.90)
Valve Seat Contact Width, in (mm) ............... 0.043-0.055 (1.1-1.4)
Valve Spring Free Length, in (mm) ............... 1.637 (41.6)
Camshaft Journal Outer Diameter (Front), in (mm) ............... 1.7303-1.7311 (43.950-43.970)
Camshaft Journal Outer Diameter (Center), in (mm) ............... 1.7283-1.7291 (43.900-43.920)
Camshaft Journal Outer Diameter (Rear), in (mm) ............... 1.7263-1.7271 (43.850-43.870)
Camshaft Bearing Inner Diameter (Front), in (mm) ............... 1.7322-1.7335 (44.000-44.030)
Camshaft Bearing Inner Diameter (Center), in (mm) ............... 1.7303-1.7317 (43.950-43.985)
Camshaft Bearing Inner Diameter (Rear), in (mm) ............... 1.7283-1.7297 (43.900-43.935)
Camshaft Journal to Bearing Clearance, in (mm) ............... 0.0011-0.0031 (0.030-0.080)
Intake Lobe Height, in (mm) ............... 1.3409-1.3421 (34.060-34.090)
Exhaust Lobe Height, in (mm) ............... 1.3409-1.3421 (34.060-34.090)
Camshaft End Play, in (mm) ............... 0.002-0.008 (0.05-0.20)
Rocker Arm Shaft Outer Diameter, in (mm) ............... 0.4716-0.4722 (11.983-11.994)
Rocker Arm Bushing Inner Diameter, in (mm) ............... 0.4724-0.4731 (12.000-12.018)
Rocker Arm to Shaft Clearance, in (mm) ............... 0.0002-0.0013 (0.006-0.035)
Idle Gear Shaft Bushing Inner Diameter, in (mm) ............... 1.4173-1.4183 (36.000-36.025)
Idle Gear Shaft Outer Diameter, in (mm) ............... 1.4153-1.4161 (35.950-35.970)
Idle Gear Shaft to Bushing Clearance, in (mm) ............... 0.0011-0.0029 (0.030-0.075)
Crankshaft Gear to Idler Gear Backlash, in (mm) ............... 0.0027-0.0059 (0.07-0.15)
Camshaft Gear to Idler Gear Backlash, in (mm) ............... 0.0027-0.0059 (0.07-0.15)

Tightening Torques

Cylinder Head Bolt (Stage 1), lb-ft (Nm) ............... 25.3-28.9 (34.3-39.2)
Cylinder Head Bolt (Stage 2), lb-ft (Nm) ............... 54.2-57.8 (73.5-78.4)
Connecting Rod Cap Bolt, lb-ft (Nm) ............... 32.5-36.1 (44.1-49.0)
Main Bearing Cap Bolt, lb-ft (Nm) ............... 72.3-75.9 (98.0-103.0)
Flywheel Mounting Bolt, lb-ft (Nm) ............... 57.8-61.4 (78.4-83.3)
Crankshaft Pulley V-Belt Nut, lb-ft (Nm) ............... 61.4-68.7 (83.3-93.1)
Camshaft Thrust Plate Bolt, lb-ft (Nm) ............... 7.2-8.7 (9.8-11.8)
Camshaft Gear Lock Nut, lb-ft (Nm) ............... 50.6-57.8 (68.6-78.4)
Idle Gear Shaft Bolt, lb-ft (Nm) ............... 17.3-21.7 (23.5-29.4)
Rocker Arm Shaft Support Bolt, lb-ft (Nm) ............... 17.3-21.7 (23.5-29.4)
Rocker Arm Adjusting Nut, lb-ft (Nm) ............... 10.1-13.0 (13.7-17.6)
Cylinder Head Valve Cover Nut, lb-ft (Nm) ............... 5.1-7.2 (6.9-9.8)
Oil Pan Drain Plug, lb-ft (Nm) ............... 36.1-43.4 (49.0-58.8)
Oil pan Mounting Bolt, lb-ft (Nm) ............... 7.2-8.7 (9.8-11.8)
Oil Pump Assembly Base Bolt, lb-ft (Nm) ............... 7.2-8.7 (9.8-11.8)
Gear Case Housing Cover Bolt, lb-ft (Nm) ............... 14.5-17.3 (19.6-23.5)
Flywheel Housing Mounting Bolt, lb-ft (Nm) ............... 28.9-32.5 (39.2-44.1)
Fuel Pump Delivery Valve Holder, lb-ft (Nm) ............... 25.3-28.9 (34.3-39.2)
Fuel Pump Locking Fixing Nut, lb-ft (Nm) ............... 14.5-17.3 (19.6-23.5)
Fuel Injection Nozzle Case Nut, lb-ft (Nm) ............... 28.9-36.1 (39.2-49.0)
Fuel Injection Nozzle Holder Nut, lb-ft (Nm) ............... 36.1-43.4 (49.0-58.8)
Fuel Injection Pipe Flare Gland Nut, lb-ft (Nm) ............... 18.1-21.7 (24.5-29.4)
Fuel Return Line Joint Bolt, lb-ft (Nm) ............... 7.2-10.1 (9.8-13.7)
Fuel Feed Pump Mounting Bolt, lb-ft (Nm) ............... 5.1-7.2 (6.9-9.8)
Water Pump Assembly Mounting Bolt, lb-ft (Nm) ............... 7.2-8.7 (9.8-11.8)
Cooling Water Temperature Sensor, lb-ft (Nm) ............... 14.5-18.1 (19.6-24.5)
Oil Pressure Switch Sensor, lb-ft (Nm) ............... 10.1-13.0 (13.7-17.6)
Thermostat Housing Cover Bolt, lb-ft (Nm) ............... 7.2-8.7 (9.8-11.8)
Exhaust Manifold Mounting Nut, lb-ft (Nm) ............... 17.3-21.7 (23.5-29.4)
Air Intake Manifold Mounting Bolt, lb-ft (Nm) ............... 14.5-17.3 (19.6-23.5)
Turbocharger Oil Feed Tube Joint Bolt, lb-ft (Nm) ............... 10.1-13.0 (13.7-17.6)
Turbocharger Oil Return Pipe Bolt, lb-ft (Nm) ............... 7.2-8.7 (9.8-11.8)
Turbocharger Mounting Flange Nut, lb-ft (Nm) ............... 17.3-21.7 (23.5-29.4)
Starter Motor Mounting Bolt, lb-ft (Nm) ............... 28.9-36.1 (39.2-49.0)
Alternator Pivot Long Bolt, lb-ft (Nm) ............... 14.5-17.3 (19.6-23.5)
Alternator Adjusting Locking Bolt, lb-ft (Nm) ............... 11.6-14.5 (15.7-19.6)
Glow Plug Body, lb-ft (Nm) ............... 10.8-14.5 (14.7-19.6)
Glow Plug Wiring Nut, lb-ft (Nm) ............... 1.1-1.4 (1.5-2.0)
Engine Base Mount Foot Bracket Bolt, lb-ft (Nm) ............... 36.1-43.4 (49.0-58.8)
Breather Valve Cover Plate Screws, lb-ft (Nm) ............... 2.2-3.6 (3.0-4.9)

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• Yanmar Engines Specs
  
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• Yanmar 3T90J Specs
  

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