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Hatz 1D81Z Engine

General Technical Data

Engine Specifications

Engine Model ............... Hatz 1D81Z
Engine Type ............... 4-stroke 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) ............... 7.6-14.1 (5.0-10.3)
Rated Engine Speed, rpm ............... 1500-3000
Peak Torque ............... 26.8-29.0 lb-ft (36.3-39.3 Nm) at 2000-2200 rpm
Idle Speed ............... 850-950 rpm
Aspiration Type ............... Naturally aspirated
Operating Speed, rpm ............... 3000
Compression Ratio ............... 20.5:1
Direction of Rotation ............... Counter-clockwise looking at flywheel side
Combustion Bowl Location ............... Centered in piston crown piston cavity
Valve Mechanism ............... Pushrod and rocker arm overhead valve setup
Number of Valves Per Cylinder ............... 2
Crankcase Breath System ............... Closed circuit crankcase breathing valve breather
Cylinder Block Type ............... Die-cast light alloy crankcase
Cylinder Liner Type ............... Grey cast iron liner
Cylinder Head Type ............... Light alloy removable head
Lubrication System ............... Full-pressure lubrication
Oil Pump Type ............... Gear-driven trochoid pump
Oil Filter Type ............... Full-flow spin-on element
Cooling System ............... Forced air cooling via flywheel blower axial fan
Air Blower Type ............... Flywheel integrated fan blade
Air Cleaner Type ............... Dry-type heavy duty dual element
Exhaust Certification ............... EPA Tier IV final and EU Stage V compliant
Starting System ............... Electric starter motor with optional manual recoil or crank handle
Electrical System ............... 12V or 24V

Fuel System

Fuel Injection Pump Type ............... Single plunger high pressure injection unit
Fuel Injection Pump Drive ............... Camshaft lobe driven mechanical roller assembly
Fuel Injection Nozzle Type ............... Multi-hole micro orifice direct injector nozzle
Fuel Injector Opening Pressure, psi (bar) ............... 3625-3770 (250.0-260.0)
Fuel Delivery Feed Pump Type ............... Mechanical diaphragm lift pump mechanical action
Governor Type ............... Centrifugal mechanical mass governor mechanical control
Fuel Filter Type ............... Spin-on fine cartridge element separator combo
Fuel Specification Standard ............... EN 590 or BS 2869 A1/A2 or ASTM D 975-09a
Fuel Tank Capacity, gal (L) ............... 1.85 (7.0)
Fuel Pre-Filter Screen Mesh Size, in (mm) ............... 0.0059 (0.15)
Maximum Fuel Return Flow, qt/h (L/h) ............... 1.58 (1.5)
Fuel Injection Timing Initial Advance, deg BTDC ............... 12.0-14.0
Fuel Injection Line High Pressure Wall Thickness, in (mm) ............... 0.078 (2.0)
Fuel System Bleeding Method ............... Manual priming lever on lift assembly unit
Fuel Water Separator Type ............... Gravity sediment bowl integrated filter style
Maximum Permissible Fuel Suction Head, in (mm) ............... 19.68 (500.0)
Maximum Permissible Fuel Temperature, deg F (deg C) ............... 140.0 (60.0)
Fuel Injection Plunger Diameter, in (mm) ............... 0.275 (7.0)
Fuel Plunger Stroke Travel, in (mm) ............... 0.236 (6.0)
Injection Nozzle Hole Quantity ............... 4
Injection Nozzle Orifice Diameter, in (mm) ............... 0.0098 (0.25)
Fuel Solenoid Operating Voltage, V ............... 12V DC or 24V DC configurations
Fuel Cut-off Mechanism ............... Mechanical stop lever or electrical shutdown solenoid
Extra Fuel Device Cold Start Setup ............... Mechanical spring-loaded auto-release system

Dimensions and Weight

Overall Length, in (mm) ............... 21.2 (540)
Overall Width, in (mm) ............... 19.8 (505)
Overall Height, in (mm) ............... 23.4 (595)
Dry Weight, lbs (kg) ............... 214 (97)

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 CJ-4
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 1D81S Specs
  
• Hatz 2G30 Specs
  

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