________________________________________________________________________________

Yanmar 3T75HL Engine

General Technical Data

Engine Specifications

Engine Model ............... Yanmar 3T75HL
Engine Type ............... 4-cycle 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) ............... 3.35 (85.0)
Displacement, cu.in (L) ............... 68.8 (1.127)
Rated Engine Power, hp (kW) ............... 24.5 (18.3)
Rated Engine Speed, rpm ............... 2600
Peak Torque ............... 54.6 lb-ft (74.0 Nm) at 1800 rpm
Idle Speed ............... 700-800 rpm
Aspiration Type ............... Naturally Aspirated
Operating Speed ............... 2600 rpm
Compression Ratio ............... 21.5:1
Firing Order ............... 1-3-2
Combustion Chamber ............... Swirl pre-combustion chamber type
Rotation Direction ............... Counterclockwise viewed from flywheel side
Cylinder Block Type ............... Cast iron
Cylinder Head Type ............... Cast iron
Lubrication System ............... Forced pressure lubrication
Oil Pump Type ............... Trochoid gear pump
Oil Filter Type ............... Full-flow, spin-on
Cooling System ............... Liquid-cooled forced circulation
Water Pump Type ............... Belt-driven, centrifugal
Air Cleaner Type ............... Dry element style
Starting System ............... Electric Starter
Electrical System ............... 12V
Alternator Output ............... 15A

Fuel System

Fuel Injection Pump Type ............... Yanmar inline Bosch type YPD-style
Fuel Injection Nozzle Type ............... Throttle nozzle style
Fuel Injection Pressure, psi (MPa) ............... 1991-2132 (13.7-14.7)
Fuel Injection Timing ............... 15-17 degrees BTDC
Fuel Transfer Pump Type ............... Mechanical diaphragm style
Governor Type ............... Mechanical centrifugal type
Fuel Filter Type ............... Spin-on cartridge type
Fuel Feed Pump Pressure, psi (kPa) ............... 2.9-4.3 (20-30)
Maximum Fuel Return Flow, gph (L/h) ............... 3.43 (13.0)
Fuel Tank Vent Pressure, psi (kPa) ............... 1.45 (10.0)
Fuel Nozzle Spray Angle ............... 40 degrees
Fuel Plunger Diameter, in (mm) ............... 0.236 (6.0)
Fuel Plunger Stroke, in (mm) ............... 0.275 (7.0)
Fuel Injection Nozzle Hole Diameter, in (mm) ............... 0.039 (1.0)
Fuel Leak-off Line Diameter, in (mm) ............... 0.157 (4.0)
Fuel Filter Filtration Rating, microns ............... 10
Minimum Fuel Inlet Pressure, inHg (kPa) ............... -1.47 (-5.0)
Maximum Fuel Inlet Temperature, F (C) ............... 122 (50)
Fuel Limit System Mechanism ............... Mechanical stop lever style

Dimensions and Weight

Overall Length, in (mm) ............... 21.6 (550)
Overall Width, in (mm) ............... 18.1 (460)
Overall Height, in (mm) ............... 23.2 (590)
Dry Weight, lbs (kg) ............... 249 (113)
Wet Weight, lbs (kg) ............... 265 (120)

Maintenance Data

Service Information

Compression Pressure, Standard, psi (MPa) ............... 412-440 (2.84-3.04)
Compression Pressure, Minimum, psi (MPa) ............... 341 (2.35)
Compression Difference Between Cylinders, psi (MPa) ............... 28.4 (0.19)
Oil Pressure at Rated Speed, psi (kPa) ............... 42.6-56.8 (294-392)
Oil Pressure at Idle Speed, psi (kPa) ............... 14.2 (98.0)
Thermostat Opening Initial Temperature, F (C) ............... 156.2 (69.0)
Thermostat Full Open Temperature, F (C) ............... 183.2 (84.0)
Cooling System Radiator Cap Pressure, psi (kPa) ............... 12.8 (88.2)
V-Belt Tension Deflection Distance, in (mm) ............... 0.39-0.59 (10.0-15.0)
Intake Valve Clearance, in (mm) ............... 0.0078 (0.20)
Exhaust Valve Clearance, 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, qt (L) ............... 3.38 (3.2)
Minimum Engine Oil Level, qt (L) ............... 2.00 (1.9)
Cooling System Capacity, qt (L) ............... 4.43 (4.2)

Service Intervals

Change engine oil ............... Every 100 hours
Replace oil filter ............... Every 200 hours
Replace fuel filter ............... Every 200 hours
Service air filter ............... Every 50 hours
Replace air filter ............... Every 500 hours
Change coolant ............... Every 1000 hours
Valve-lash adjustment ............... Every 400 hours
Check fuel system ............... Every 400 hours
Compression test ............... Every 1000 hours
Belt inspection ............... Every 100 hours

Service Specifications

Cylinder Bore Inner Diameter, in (mm) ............... 2.9527-2.9539 (75.000-75.030)
Cylinder Bore Maximum Wear Limit, in (mm) ............... 2.9606 (75.200)
Connecting Rod Small End Bushing I.D, in (mm) ............... 0.8669-0.8677 (22.020-22.040)
Connecting Rod Big End Bearing Clearance, in (mm) ............... 0.0014-0.0033 (0.035-0.085)
Crankshaft Main Journal Outer Diameter, in (mm) ............... 2.0472-2.0480 (52.000-52.020)
Connecting Rod Big End Inside Diameter, in (mm) ............... 1.9291-1.9299 (49.000-49.020)
Crankshaft Main Bearing Clearance, in (mm) ............... 0.0015-0.0035 (0.038-0.090)
Crankpin Outer Diameter, in (mm) ............... 1.8110-1.8118 (46.000-46.020)
Crankshaft End Play, in (mm) ............... 0.0043-0.0094 (0.110-0.240)
Piston Skirt Outer Diameter, in (mm) ............... 2.9492-2.9504 (74.910-74.940)
Piston to Cylinder Wall Clearance, in (mm) ............... 0.0035-0.0047 (0.090-0.120)
Piston Pin Bore Inner Diameter, in (mm) ............... 0.8661-0.8665 (22.000-22.009)
Piston Pin Outer Diameter, in (mm) ............... 0.8657-0.8661 (21.989-22.000)
Piston Pin to Piston Pin Bore Clearance, in (mm) ............... 0.0000-0.0007 (0.000-0.020)
Piston Pin to Small End Bushing Clearance, in (mm) ............... 0.0007-0.0020 (0.020-0.051)
Top Ring Groove Width, in (mm) ............... 0.0807-0.0815 (2.050-2.070)
Second Ring Groove Width, in (mm) ............... 0.0807-0.0815 (2.050-2.070)
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) ............... 0.0019-0.0035 (0.050-0.090)
Oil Ring Side Clearance, in (mm) ............... 0.0011-0.0027 (0.030-0.070)
Top Ring End Gap, in (mm) ............... 0.0078-0.0157 (0.200-0.400)
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 Surface Flatness Distortion, in (mm) ............... 0.0019 (0.050)
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 Outer Diameter (Front), in (mm) ............... 1.5728-1.5736 (39.950-39.970)
Camshaft Journal Outer Diameter (Middle), in (mm) ............... 1.5334-1.5342 (38.950-38.970)
Camshaft Journal Outer Diameter (Rear), in (mm) ............... 1.4547-1.4555 (36.950-36.970)
Camshaft Bearing Oil Clearance, in (mm) ............... 0.0019-0.0041 (0.050-0.105)
Cam Lobe Height (Intake), in (mm) ............... 1.3366-1.3405 (33.950-34.050)
Cam Lobe Height (Exhaust), in (mm) ............... 1.3366-1.3405 (33.950-34.050)
Camshaft End Play, in (mm) ............... 0.0019-0.0059 (0.050-0.150)
Rocker Arm Shaft Outer Diameter, in (mm) ............... 0.6287-0.6295 (15.970-15.990)
Rocker Arm Bushing Inner Diameter, in (mm) ............... 0.6303-0.6314 (16.010-16.040)
Rocker Arm Bushing Clearance, in (mm) ............... 0.0007-0.0027 (0.020-0.070)
Tappet Guide Hole Inner Diameter, in (mm) ............... 0.4724-0.4731 (12.000-12.018)
Tappet Stem Outer Diameter, in (mm) ............... 0.4704-0.4712 (11.950-11.970)
Tappet to Guide Hole Clearance, in (mm) ............... 0.0011-0.0026 (0.030-0.068)
Crankshaft Gear to Camshaft Gear Backlash, in (mm) ............... 0.0027-0.0055 (0.070-0.140)
Crankshaft Gear to Idle Gear Backlash, in (mm) ............... 0.0027-0.0055 (0.070-0.140)
Camshaft Gear to Injection Pump Gear Backlash, in (mm) ............... 0.0027-0.0055 (0.070-0.140)

Tightening Torques

Cylinder Head Bolt, lb-ft (Nm) ............... 57.8-61.4 (78.5-83.3)
Connecting Rod Cap Bolt, lb-ft (Nm) ............... 34.7-38.3 (47.1-52.0)
Main Bearing Cap Bolt, lb-ft (Nm) ............... 61.4-65.0 (83.3-88.2)
Flywheel Mounting Bolt, lb-ft (Nm) ............... 61.4-65.0 (83.3-88.2)
Flywheel Housing Fastener Bolt, lb-ft (Nm) ............... 18.0-21.6 (24.5-29.4)
Crankshaft Pulley End Center Bolt, lb-ft (Nm) ............... 68.6-75.9 (93.0-103.0)
Camshaft Thrust Metal Plate Bolt, lb-ft (Nm) ............... 7.2-8.6 (9.8-11.7)
Rocker Arm Shaft Support Bolt, lb-ft (Nm) ............... 18.0-21.6 (24.5-29.4)
Valve Cover Nut Cap Fastener, lb-ft (Nm) ............... 5.0-6.5 (6.8-8.8)
Timing Gear Case Cover Bolt, lb-ft (Nm) ............... 18.0-21.6 (24.5-29.4)
Oil Pan Mounting Perimeter Bolt, lb-ft (Nm) ............... 14.4-18.0 (19.6-24.5)
Oil Pan Bottom Drain Plug Fastener, lb-ft (Nm) ............... 36.1-43.3 (49.0-58.8)
Fuel Pump Drive Gear Nut, lb-ft (Nm) ............... 43.3-50.6 (58.8-68.6)
Fuel Pump Holding Bracket Nut, lb-ft (Nm) ............... 18.0-21.6 (24.5-29.4)
Fuel Injection Nozzle Holder Assembly, lb-ft (Nm) ............... 28.9-36.1 (39.2-49.0)
Fuel High Pressure Line Union Nut, lb-ft (Nm) ............... 18.0-21.6 (24.5-29.4)
Fuel Leak-off Pipe Joint Hollow Bolt, lb-ft (Nm) ............... 7.2-10.8 (9.8-14.7)
Fuel Injection Nozzle Case Nut, lb-ft (Nm) ............... 28.9-36.1 (39.2-49.0)
Water Pump Mounting Assembly Bolt, lb-ft (Nm) ............... 14.4-18.0 (19.6-24.5)
Thermostat Housing Water Outlet Bolt, lb-ft (Nm) ............... 14.4-18.0 (19.6-24.5)
Exhaust Manifold Flange Holding Nut, lb-ft (Nm) ............... 18.0-21.6 (24.5-29.4)
Intake Manifold Flange Holding Stud Nut, lb-ft (Nm) ............... 14.4-18.0 (19.6-24.5)
Oil Pump Cover Screw, lb-ft (Nm) ............... 5.0-6.5 (6.8-8.8)
Oil Pressure Regulator Valve Plug, lb-ft (Nm) ............... 28.9-36.1 (39.2-49.0)
Oil Pressure Switch Sender Sensor, lb-ft (Nm) ............... 10.8-14.4 (14.7-19.6)
Coolant Water Temperature Sensor, lb-ft (Nm) ............... 14.4-21.6 (19.6-29.4)
Glow Plug Main Installation Body, lb-ft (Nm) ............... 10.8-14.4 (14.7-19.6)
Glow Plug Terminal Wiring Nut, lb-ft (Nm) ............... 1.0-1.5 (1.3-2.0)
Starter Motor Frame Mounting Bolt, lb-ft (Nm) ............... 28.9-36.1 (39.2-49.0)
Alternator Pivot Mount Long Bolt, lb-ft (Nm) ............... 28.9-36.1 (39.2-49.0)
Alternator Adjusting Tension Bracket Bolt, lb-ft (Nm) ............... 14.4-18.0 (19.6-24.5)
Idler Gear Shaft Support Fastener Bolt, lb-ft (Nm) ............... 18.0-21.6 (24.5-29.4)
Oil Filter Bracket Connection Bolt, lb-ft (Nm) ............... 18.0-21.6 (24.5-29.4)

________________________________________________________________________________________

• Yanmar Engines Specs
  
• Yanmar 3T72HA Specs
  
• Yanmar 3T72SA Specs
  
• Yanmar 3T72SB Specs
  
• Yanmar 3T75U Specs
  
• Yanmar 3TG66UJ Specs
  
• Yanmar 3TG72 Specs
  

________________________________________________________________________________

________________________________________________________________________________________

_______________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________