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Hatz 1D81S Engine

General Technical Data

Engine Specifications

Engine Model ............... Hatz 1D81S
Engine Type ............... 4-cycle vertical single-cylinder direct injection air-cooled diesel
Number of Cylinders ............... 1
Engine Bore, in (mm) ............... 3.94 (100.0)
Engine Stroke, in (mm) ............... 3.35 (85.0)
Displacement, cu.in (L) ............... 40.7 (0.667)
Rated Engine Power, hp (kW) ............... 6.7-13.8 (5.0-10.3)
Rated Engine Speed, rpm ............... 1500-3000
Peak Torque ............... 26.8 lb-ft (36.3 Nm) at 2000 rpm
Idle Speed ............... 850-950 rpm
Aspiration Type ............... Naturally Aspirated
Operating Speed, rpm ............... 1500-3000
Compression Ratio ............... 20.5:1
Rotation Direction ............... Counterclockwise looking at flywheel side
Combustion System ............... Direct multi-hole nozzle injection system
Valve Config ............... Overhead valve mechanism with pushrods and rockers
Number of Valves ............... 2
Valves Per Cylinder ............... 2
Exhaust System ............... Integrated high attenuation silencer muffler unit
Crankshaft Material ............... Forged steel alloy running on plain journals
Connecting Rod Type ............... Forged steel rod with split plain big end bearing journals
Cylinder Liner Type ............... Integral heavy duty grey cast iron bore structure
Decompression Mechanism ............... Automatic device system
Power Take Off Points ............... Flywheel side plus up to three separate auxiliary drive shafts
Cylinder Block Type ............... Diecast light alloy crankcase
Cylinder Head Type ............... Light alloy cylinder head
Lubrication System ............... Full pressure circulation
Oil Pump Type ............... Gear-driven oil pump
Oil Filter Type ............... Full-flow spin-on cartridge
Cooling System ............... Air-cooled via flywheel fan blower
Flywheel Fan Type ............... Integrated flywheel cooling blower fan
Air Cleaner Type ............... Dry type multi-stage or optional oil bath air cleaner
Emission Certification ............... EPA Tier 4 final compliant variant configurations
Starting System ............... Electric starter motor with optional recoil or crankhandle back up
Electrical System ............... 12V or 24V configurations
Alternator Output ............... 14A

Fuel System

Fuel Injection Pump Type ............... Integrated high pressure mechanical plunge pump
Fuel Injector Nozzle Type ............... Multi-hole direct injection nozzle tip design assembly
Fuel Injection Pressure, psi (bar) ............... 2900-3625 (200-250)
Fuel Feed Pump Type ............... Mechanical diaphragm lift pump driven
Governor Type ............... Centrifugal mechanical governor
Primary Fuel Filter Type ............... Inline pre-filter water separator mesh bowl screen element
Secondary Fuel Filter Type ............... Spin-on canister fine element micro filter cartridge
Fuel Type Requirements ............... Ultra low sulfur diesel fuel meeting EN 590 or ASTM D975 std
Fuel Tank Capacity, gal (L) ............... 1.85 (7.0)
Fuel Consumption Rate, lb/hp-hr (g/kWh) ............... 0.395 (240)
Fuel Return Line System ............... Low pressure leak off return line pipe routing to main tank
Fuel Injection Timing ............... Fixed static spill port timing alignment shim adjustments
Fuel Shut Off System ............... Manual mechanical stop lever or electric stop solenoid
Cold Start Device System ............... Manual excess fuel delivery push mechanism switch button
Maximum Fuel Lift Height, ft (m) ............... 3.3 (1.0)
Maximum Fuel System Backpressure, inHg (bar) ............... 1.47 (0.05)
Fuel Injection Line Material ............... Thick walled high pressure double jacket steel piping lines
Fuel Tank Cap Type ............... Vented leakproof screw cap fitted with splash safety guard retainer
Fuel System Air Bleeding Device ............... Manual primer plunger mechanism on lift pump
Biodiesel Fuel Suitability ............... Maximum limit B7 blend mixture fulfilling
Water Separation Efficiency ............... 95 percent rating from base fuel stream volume feed flow
Nozzle Opening Pressure Standard, psi (bar) ............... 3190 (220)
Injection Pump Plunger Clearance, in (mm) ............... 0.00012 (0.003)
Fuel Delivery Control Rod Travel, in (mm) ............... 0.47 (12.0)
Fuel System Vent Ventilation Type ............... Atmospheric tank breather equipped with filtration element

Dimensions and Weight

Overall Length, in (mm) ............... 17.0 (430)
Overall Width, in (mm) ............... 18.6 (470)
Overall Height, in (mm) ............... 23.2 (590)
Dry Weight, lbs (kg) ............... 232 (105)

Maintenance Data

Service Information

Compression Pressure Range, psi (bar) ............... 435.1-507.6 (30.0-35.0)
Oil Pressure at Low Idle, psi (bar) ............... 8.7 (0.6)
Oil Pressure at Rated Rated, psi (bar) ............... 36.2-58.0 (2.5-4.0)
Relief Valve Opening Pressure, psi (bar) ............... 65.2 (4.5)
Maximum Permitted Oil Temperature, F (C) ............... 266.0 (130.0)
Intake Valve Clearance, Cold, in (mm) ............... 0.0039 (0.100)
Exhaust Valve Clearance, Cold, in (mm) ............... 0.0078 (0.200)

Engine Oil

Engine Oil Type .................. SAE 20W-50, SAE 10W-30, 15W-40
API Service Classifications ......................... CH-4 or higher
Crankcase Oil Capacity (Max Mark), qt (L) ............... 2.01 (1.9)
Crankcase Oil Capacity (Min Mark), qt (L) ............... 1.16 (1.1)

Service Intervals

Change engine oil ............... Every 250 hours
Clean oil filter ............... Every 250 hours
Replace fuel filter ............... Every 500 hours
Service air filter ............... Every 500 hours
Valve-lash adjustment ............... Every 250 hours
Check fuel system ............... Every 500 hours
Compression test ............... Every 1000 hours
Replace breather valve ............... Every 1000 hours
Belt inspection ............... Every 100 hours

Service Specifications

Cylinder Bore Inside Diameter, in (mm) ............... 3.9370-3.9378 (100.000-100.022)
Cylinder Bore Maximum Wear Limit, in (mm) ............... 3.9417 (100.120)
Cylinder Bore Taper Ovality Limit, in (mm) ............... 0.0019 (0.050)
Crankshaft Main Journal Diameter, in (mm) ............... 2.7553-2.7561 (69.985-70.000)
Crankpin Journal Diameter, in (mm) ............... 2.3616-2.3622 (59.985-60.000)
Main Bearing Shell Inside Diameter, in (mm) ............... 2.7578-2.7594 (70.050-70.090)
Connecting Rod Big End Bearing I.D, in (mm) ............... 2.3637-2.3653 (60.040-60.080)
Crankshaft Main Bearing Clearance, in (mm) ............... 0.0019-0.0041 (0.050-0.105)
Connecting Rod Big End Clearance, in (mm) ............... 0.0015-0.0037 (0.040-0.095)
Crankshaft Axial End Play, in (mm) ............... 0.0039-0.0118 (0.100-0.300)
Connecting Rod Big End Side Clearance, in (mm) ............... 0.0078-0.0157 (0.200-0.400)
Piston Skirt Outer Diameter, in (mm) ............... 3.9342-3.9350 (99.930-99.950)
Piston to Cylinder Bore Clearance, in (mm) ............... 0.0020-0.0036 (0.050-0.092)
Piston Pin Bore Inside Diameter, in (mm) ............... 1.2599-1.2602 (32.002-32.010)
Piston Pin Outer Diameter, in (mm) ............... 1.2596-1.2598 (31.994-32.000)
Piston Pin Small End Bushing I.D, in (mm) ............... 1.2604-1.2610 (32.015-32.030)
Piston Pin to Small End Bushing Clearance, in (mm) ............... 0.0006-0.0014 (0.015-0.036)
Top Ring Groove Width, in (mm) ............... 0.0992-0.1000 (2.520-2.540)
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) ............... 0.0019-0.0035 (0.050-0.090)
Second Ring Side Clearance, in (mm) ............... 0.0019-0.0035 (0.050-0.090)
Oil Ring Side Clearance, in (mm) ............... 0.0019-0.0035 (0.050-0.090)
Piston Ring End Gap Top Ring New, in (mm) ............... 0.0118-0.0197 (0.300-0.500)
Piston Ring End Gap Compression Ring New, in (mm) ............... 0.0118-0.0197 (0.300-0.500)
Piston Ring End Gap Oil Scraper Ring New, in (mm) ............... 0.0098-0.0177 (0.250-0.450)
Intake Valve Stem Outer Diameter, in (mm) ............... 0.3137-0.3145 (7.970-7.990)
Exhaust Valve Stem Outer Diameter, in (mm) ............... 0.3129-0.3137 (7.950-7.970)
Valve Guide Inside Diameter, in (mm) ............... 0.3150-0.3159 (8.000-8.025)
Intake Valve Stem to Guide Clearance, in (mm) ............... 0.0004-0.0021 (0.010-0.055)
Exhaust Valve Stem to Guide Clearance, in (mm) ............... 0.0011-0.0029 (0.030-0.075)
Intake Valve Seat Width, in (mm) ............... 0.0590-0.0708 (1.500-1.800)
Exhaust Valve Seat Width, in (mm) ............... 0.0787-0.0905 (2.000-2.300)
Valve Sink Depth, in (mm) ............... 0.0275-0.0433 (0.700-1.100)
Valve Spring Free Length, in (mm) ............... 1.8897 (48.000)
Camshaft Journal Diameter (Timing Side), in (mm) ............... 1.6527-1.6535 (41.980-42.000)
Camshaft Journal Diameter (Flywheel Side), in (mm) ............... 1.1803-1.1811 (29.980-30.000)
Camshaft Bearing Clearance, in (mm) ............... 0.0011-0.0031 (0.030-0.080)
Cam Lobe Height (Intake), in (mm) ............... 1.4960-1.5000 (38.000-38.100)
Cam Lobe Height (Exhaust), in (mm) ............... 1.4960-1.5000 (38.000-38.100)

Tightening Torques

Cylinder Head Nuts (Step 1), lb-ft (Nm) ............... 14.7 (20.0)
Cylinder Head Nuts (Step 2), lb-ft (Nm) ............... 36.8 (50.0)
Cylinder Head Nuts (Step 3), lb-ft (Nm) ............... 55.3-59.0 (75.0-80.0)
Connecting Rod Cap Bolt (Step 1), lb-ft (Nm) ............... 22.1 (30.0)
Connecting Rod Cap Bolt (Step 2), lb-ft (Nm) ............... 44.2-47.9 (60.0-65.0)
Flywheel Center Central Nut, lb-ft (Nm) ............... 258.1-272.9 (350.0-370.0)
Main Bearing Housing Block Bolts, lb-ft (Nm) ............... 33.1-36.8 (45.0-50.0)
Counterweight Cap Screws, lb-ft (Nm) ............... 44.2 (60.0)
Camshaft Timing Gear Bolt, lb-ft (Nm) ............... 33.1 (45.0)
Timing Case Gear Cover Screws, lb-ft (Nm) ............... 16.2 (22.0)
Rocker Arm Shaft Support Bolt, lb-ft (Nm) ............... 18.4 (25.0)
Valve Clearance Adjustment Nut Screws, lb-ft (Nm) ............... 8.8 (12.0)
Fuel Pump Flange Mounting Nuts, lb-ft (Nm) ............... 18.4 (25.0)
Fuel Injection Valve Nozzle Holder Nuts, lb-ft (Nm) ............... 16.2 (22.0)
High Pressure Fuel Pipe Delivery Nuts, lb-ft (Nm) ............... 22.1 (30.0)
Oil Drain Plug Bolt, lb-ft (Nm) ............... 36.8 (50.0)
Oil Pressure Switch, lb-ft (Nm) ............... 14.7 (20.0)
Oil Pump Assembly Plate Hex Screws, lb-ft (Nm) ............... 7.3 (10.0)
Cylinder Head Top Valve Cover Nut, lb-ft (Nm) ............... 7.3 (10.0)
Air Intake Manifold Flange Bolts, lb-ft (Nm) ............... 16.2 (22.0)
Exhaust Muffler Manifold Stud Nuts, lb-ft (Nm) ............... 25.8 (35.0)
Electric Starter Flange Mounting Stud Nuts, lb-ft (Nm) ............... 33.1 (45.0)
Alternator Stator Assembly Frame Screws, lb-ft (Nm) ............... 3.6 (5.0)
Decompression Automatic Device Control Housing, lb-ft (Nm) ............... 16.2 (22.0)
Speed Governor Mechanical Control Housing, lb-ft (Nm) ............... 7.3 (10.0)
Speed Control Hand Lever Pivot Friction Bolt, lb-ft (Nm) ............... 11.0 (15.0)
Engine Support Base Mounting Anchor Bolts, lb-ft (Nm) ............... 62.6 (85.0)
Crankcase Breather Internal Plate Screws, lb-ft (Nm) ............... 5.1 (7.0)
Fuel Tank Frame Bracket Isolation Assembly, lb-ft (Nm) ............... 16.2 (22.0)
Air Cowling Cover Sheet Metal Fasteners, lb-ft (Nm) ............... 5.1 (7.0)
Flywheel Outer Charging Ring Mount Screws, lb-ft (Nm) ............... 7.3 (10.0)
Blowby Gas Ventilation Top Tube Fitting, lb-ft (Nm) ............... 14.7 (20.0)
Fuel Pump Bleeder Assembly Vent Valve, lb-ft (Nm) ............... 5.9 (8.0)
Oil Screen Cover Sump Access Plate Bolts, lb-ft (Nm) ............... 7.3 (10.0)
External Auxiliary PTO Flange Bolts, lb-ft (Nm) ............... 36.8 (50.0)

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• Hatz Engines Specs
  
• Hatz 1D81 Specs
  
• Hatz 1D81Z Specs
  
• Hatz 2G30 Specs
  

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