________________________________________________________________________________

Yanmar 3T75U Engine

General Technical Data

Engine Specifications

Engine Model ............... Yanmar 3T75U
Engine Type ............... 4-cycle vertical inline 3-cylinder liquid-cooled diesel
Number of Cylinders ............... 3
Cylinder Arrangement ............... In-line
Engine Bore, in (mm) ............... 2.95 (75.0)
Engine Stroke, in (mm) ............... 2.95 (75.0)
Displacement, cu.in (L) ............... 60.7 (0.994)
Rated Engine Power, hp (kW) ............... 16.0-21.0 (11.9-15.7)
Rated Engine Speed, rpm ............... 2500-2750
Peak Torque ............... 44.2-51.6 Nm (32.6-38.1 lb-ft) at 1800-2000 rpm
Idle Speed ............... 700-800 rpm
Aspiration Type ............... Naturally Aspirated
Operating Speed ............... 2500 rpm
Compression Ratio ............... 23.3:1
Firing Order ............... 1-3-2
Cylinder Block Type ............... Cast iron monoblock
Cylinder Head Type ............... Cast iron single piece
Combustion Chamber ............... Special swirl pre-combustion type
Flywheel Rotation ............... Counterclockwise viewed from flywheel side
PTO Drive ............... Flywheel end split shaft output
Lubrication System ............... Forcible pressure lubrication
Oil Pump Type ............... Trochoid rotor pump
Oil Filter Type ............... Full-flow, spin-on cartridge
Cooling System ............... Liquid-cooled radiator with hybrid thermosiphon force assist
Water Pump Type ............... Belt-driven centrifugal pump
Air Cleaner Type ............... Dry dual-stage element
Starting System ............... Electric Starter axial reduction
Electrical System ............... 12V system

Fuel System

Fuel Injection Pump Type ............... Bosch type inline YPD injection pump
Fuel Feed Pump Type ............... Mechanical diaphragm type pump
Fuel Injection Nozzle Type ............... Throttle type nozzle assembly
Injection Pressure, psi (MPa) ............... 2275-2417 (15.7-16.7)
Fuel Injection Timing, deg ............... 18.0 deg BTDC
Fuel Filter Type ............... Paper element type with integrated water separator bowl
Fuel Return Line ............... Overflow leak-off pipe linked back to main fuel tank
Fuel Specific Consumption, g/kWh ............... 275.0-286.0
Maximum Supply Lift, ft (m) ............... 3.30 (1.0)
Maximum Fuel Inlet Restriction, inHg (kPa) ............... 3.94 (13.3)
Fuel Transfer Pump Delivery, gpm (L/min) ............... 0.21 (0.80)
Nozzle Valve Seat Angle, deg ............... 45.0
Nozzle Needle Diameter, in (mm) ............... 0.157 (4.0)
Nozzle Holder Shank Diameter, in (mm) ............... 0.669 (17.0)
Fuel Tank Base Return Loop ............... Non-return spring checks protection
Plunger Diameter, in (mm) ............... 0.216 (5.5)
Plunger Stroke, in (mm) ............... 0.275 (7.0)
Delivery Valve Opening Pressure, psi (MPa) ............... 426.0 (2.94)

Dimensions and Weight

Overall Length, in (mm) ............... 18.9 (480)
Overall Width, in (mm) ............... 14.9 (380)
Overall Height, in (mm) ............... 20.5 (520)
Dry Weight without Accessories, lbs (kg) ............... 216 (98)
Wet Weight with Fluid Loads, lbs (kg) ............... 232 (105)

Maintenance Data

Service Information

Oil Pressure at Low Idle, psi (kPa) ............... 14.2 (98.1)
Oil Pressure at Rated Speed, psi (kPa) ............... 42.6-56.8 (294.0-392.0)
Thermostat Valve Opening Start, F (C) ............... 160.0 (71.0)
Thermostat Full Open Position, F (C) ............... 185.0 (85.0)
Radiator Cap Relief Valve Pressure, psi (kPa) ............... 12.8 (88.2)
Alternator Belt Tension Deflection, in (mm) ............... 0.39-0.51 (10.0-13.0)
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 ......................... CD or CF
Engine Oil Capacity with Filter, qt (L) ............... 2.64 (2.50)
Engine Oil Capacity (Base Pan), qt (L) ............... 2.21 (2.10)
Coolant System Capacity, qt (L) ............... 4.22 (4.00)

Service Intervals

Change engine oil ............... Every 150 hours
Replace oil filter ............... Every 150 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 500 hours
Check fuel system ............... Every 500 hours
Compression test ............... Every 1000 hours
Belt inspection ............... Every 100 hours

Service Specifications

Cylinder Bore Inside Diameter, in (mm) ............... 2.9527-2.9539 (75.000-75.030)
Cylinder Bore Maximum Wear Limit, in (mm) ............... 2.9606 (75.200)
Cylinder Bore Out-of-Round Maximum, in (mm) ............... 0.0007 (0.020)
Cylinder Block Tappet Bore I.D, in (mm) ............... 0.4724-0.4731 (12.000-12.018)
Crankshaft Main Journal Diameter, in (mm) ............... 1.9665-1.9671 (49.950-49.965)
Crankpin Journal Diameter, in (mm) ............... 1.6913-1.6919 (42.960-42.975)
Main Bearing Clearance, in (mm) ............... 0.0015-0.0035 (0.040-0.090)
Con Rod Bearing Clearance, in (mm) ............... 0.0013-0.0031 (0.035-0.080)
Crankshaft End Play, in (mm) ............... 0.0039-0.0098 (0.100-0.250)
Piston Skirt Outside Diameter, in (mm) ............... 2.9484-2.9496 (74.890-74.920)
Piston to Cylinder Wall Clearance, in (mm) ............... 0.0031-0.0055 (0.080-0.140)
Piston Pin Bore Inside Diameter, in (mm) ............... 0.7874-0.7877 (20.000-20.009)
Piston Pin Outside Diameter, in (mm) ............... 0.7870-0.7874 (19.991-20.000)
Piston Pin to Small End Bushing Clearance, in (mm) ............... 0.0005-0.0015 (0.012-0.040)
Top Ring Groove Clearance, in (mm) ............... 0.0027-0.0043 (0.070-0.110)
Second Ring Groove Clearance, in (mm) ............... 0.0015-0.0031 (0.040-0.080)
Oil Ring Groove Clearance, in (mm) ............... 0.0007-0.0027 (0.020-0.070)
Top Ring End Gap, in (mm) ............... 0.0078-0.0137 (0.200-0.350)
Second Ring End Gap, in (mm) ............... 0.0059-0.0118 (0.150-0.300)
Oil Ring End Gap, in (mm) ............... 0.0078-0.0157 (0.200-0.400)
Intake Valve Stem Outer Diameter, in (mm) ............... 0.2736-0.2742 (6.950-6.965)
Exhaust Valve Stem Outer Diameter, in (mm) ............... 0.2728-0.2736 (6.930-6.950)
Intake Valve Guide Inner Diameter, in (mm) ............... 0.2755-0.2761 (7.000-7.015)
Exhaust Valve Guide Inner Diameter, in (mm) ............... 0.2755-0.2761 (7.000-7.015)
Intake Valve Guide to Stem Clearance, in (mm) ............... 0.0013-0.0025 (0.035-0.065)
Exhaust Valve Guide to Stem Clearance, in (mm) ............... 0.0019-0.0033 (0.050-0.085)
Intake Valve Face Angle, degrees ............... 45
Exhaust Valve Face Angle, degrees ............... 45
Intake Valve Seat Width, in (mm) ............... 0.0421-0.0539 (1.070-1.370)
Exhaust Valve Seat Width, in (mm) ............... 0.0488-0.0606 (1.240-1.540)
Intake Valve Recess Depth, in (mm) ............... 0.0275-0.0354 (0.700-0.900)
Exhaust Valve Recess Depth, in (mm) ............... 0.0275-0.0354 (0.700-0.900)
Valve Spring Free Length, in (mm) ............... 1.4881 (37.800)
Camshaft Journal Standard, in (mm) ............... 1.5732-1.5740 (39.960-39.980)
Camshaft Bearing Clearance, in (mm) ............... 0.0007-0.0027 (0.020-0.070)
Cam Lobe Height (Intake), in (mm) ............... 1.3346-1.3385 (33.900-34.000)
Cam Lobe Height (Exhaust), in (mm) ............... 1.3346-1.3385 (33.900-34.000)
Rocker Arm Shaft Outside Diameter, in (mm) ............... 0.5503-0.5511 (13.980-14.000)
Rocker Arm Bushing Inside Diameter, in (mm) ............... 0.5515-0.5523 (14.010-14.030)

Tightening Torques

Cylinder Head Bolts, lb-ft (Nm) ............... 54.2-57.8 (73.5-78.5)
Connecting Rod Cap Nut, lb-ft (Nm) ............... 27.4-30.4 (37.2-41.2)
Main Bearing Cap Bolts, lb-ft (Nm) ............... 57.8-61.4 (78.5-83.3)
Flywheel Retention Bolts, lb-ft (Nm) ............... 43.4-47.0 (58.8-63.7)
Crankshaft Front V-Pulley Lock Nut, lb-ft (Nm) ............... 61.4-68.7 (83.3-93.2)
Camshaft Gear Locking Bolt, lb-ft (Nm) ............... 43.4-50.6 (58.8-68.6)
Rocker Arm Shaft Support Nuts, lb-ft (Nm) ............... 18.0-21.7 (24.5-29.4)
Valve Lash Adjusting Lock Nuts, lb-ft (Nm) ............... 10.8-14.4 (14.7-19.6)
Fuel Injection Nozzle Holder Assembly, lb-ft (Nm) ............... 28.9-36.1 (39.2-49.0)
Fuel Injection Delivery Pipe Caps, lb-ft (Nm) ............... 14.4-18.0 (19.6-24.5)
Fuel Pump Mounting Flange Nuts, lb-ft (Nm) ............... 14.4-18.0 (19.6-24.5)
Oil Pan Sump Drain Plug, lb-ft (Nm) ............... 36.1-43.4 (49.0-58.8)
Oil Pan Perimeter Attaching Bolts, lb-ft (Nm) ............... 7.2-8.7 (9.8-11.8)
Timing Gear Case Cover Screws, lb-ft (Nm) ............... 7.2-8.7 (9.8-11.8)
Flywheel Housing Rigid Fasteners, lb-ft (Nm) ............... 28.9-36.1 (39.2-49.0)
Water Pump Assembly Holding Bolts, lb-ft (Nm) ............... 7.2-8.7 (9.8-11.8)
Thermostat Housing Mount Screws, lb-ft (Nm) ............... 7.2-8.7 (9.8-11.8)
Intake Manifold Sealing Bolts, lb-ft (Nm) ............... 14.4-18.0 (19.6-24.5)
Exhaust Manifold Thermal Stud Nuts, lb-ft (Nm) ............... 18.0-21.7 (24.5-29.4)
Glow Plug Cylindrical Core, lb-ft (Nm) ............... 10.8-14.4 (14.7-19.6)
Oil Pressure Sensor Sending Switch, lb-ft (Nm) ............... 10.8-14.4 (14.7-19.6)
Starter Motor Base Flange Connection, lb-ft (Nm) ............... 28.9-36.1 (39.2-49.0)
Alternator Pivot Joint Anchor Bolt, lb-ft (Nm) ............... 14.4-21.7 (19.6-29.4)
Alternator Tension Link Lock Fastener, lb-ft (Nm) ............... 10.8-14.4 (14.7-19.6)
Idler Gear Shaft Secure Stud, lb-ft (Nm) ............... 18.0-21.7 (24.5-29.4)
Oil Pump Internal Cover Screw, lb-ft (Nm) ............... 5.0-7.2 (6.8-9.8)
Fuel Feed Lift Pump Plate Bolts, lb-ft (Nm) ............... 7.2-8.7 (9.8-11.8)
Breather Assembly Top Cover Screws, lb-ft (Nm) ............... 3.6-5.0 (4.9-6.8)
Crankcase Tie Rod End Anchors, lb-ft (Nm) ............... 18.0-21.7 (24.5-29.4)
Fan Blade Spider Screw Set, lb-ft (Nm) ............... 7.2-8.7 (9.8-11.8)

________________________________________________________________________________________

• Yanmar Engines Specs
  
• Yanmar 3T72HA Specs
  
• Yanmar 3T72SA Specs
  
• Yanmar 3T72SB Specs
  
• Yanmar 3T75HL Specs
  
• Yanmar 3TG66UJ Specs
  
• Yanmar 3TG72 Specs
  

________________________________________________________________________________

________________________________________________________________________________________

_______________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________