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Hatz 1D81 Engine

General Technical Data

Engine Specifications

Engine Model ............... Hatz 1D81
Engine Type ............... 4-cycle single-cylinder air-cooled direct-injection diesel
Number of Cylinders ............... 1
Cylinder Arrangement ............... Vertical single-cylinder
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
Lower Idle Speed, rpm ............... 850-950
Upper Idle Speed, rpm ............... 3150-3250
Aspiration Type ............... Naturally Aspirated
Compression Ratio ............... 20.5:1
Direction of Rotation ............... Counterclockwise looking at flywheel
Combustion System ............... Direct injection with multi-hole nozzle configuration
Decompression System ............... Automatic mechanical automatic decompression device
Balancing System ............... Dual counter-rotating balance shafts option
Power Take-Off Sides ............... Crankshaft flywheel side or gear timing cover side
Exhaust Gas Recirculation ............... External optional circuit configuration
Cylinder Block Material ............... High-strength die-cast aluminum alloy
Cylinder Crankcase Type ............... Tunnel-type aluminum crankcase
Cylinder Liner Type ............... Separately cast wear-resistant gray iron liner
Cylinder Head Type ............... Single-piece crossflow aluminum alloy casting
Lubrication System ............... Full-pressure circulation via gear pump
Oil Pump Type ............... Positive-displacement gear pump
Oil Filter Type ............... Full-flow screen mesh or spin-on cartridge option
Cooling System ............... Axial-flow cooling blower fan integral with flywheel
Cooling Fan Drive ............... Direct-driven via crankshaft extension flange
Air Cleaner Type ............... Dry-type paper element or oil-bath air cleaner option
Emissions Certification ............... EPA Tier 4 Final and EU Stage V compliant
Starting System ............... Manual crankhandle or heavy-duty electric starter option
Electrical System ............... 12V or 24V DC configurations
Alternator Output ............... 14A or 7A integrated fly-wheel generator

Fuel System

Fuel Injection Pump Type ............... Single-plunger high-pressure block element unit
Injection Pump Model ............... Bosch PFR 1K 80 or PFR 1K 90 variant
Injection Nozzle Type ............... Multi-hole micro-orifice spray nozzle
Injection Valve Model ............... Bosch DLLA series micro-aperture matching unit
Nozzle Opening Pressure, psi (bar) ............... 3190-3480 (220.0-240.0)
Fuel Injection Timing, degrees BTDC ............... 11.5-13.5
Plunger Diameter, in (mm) ............... 0.315 (8.0)
Plunger Stroke, in (mm) ............... 0.276 (7.0)
Fuel Delivery Pump Type ............... Mechanical diaphragm lift pump option
Fuel Delivery Pressure, psi (bar) ............... 2.9-4.3 (0.2-0.3)
Fuel Filter System ............... Micro-fiber spin-on depth filtration cartridge
Fuel Return Line Volume, gph (L/h) ............... 0.26-0.53 (1.0-2.0)
Maximum Allowed Fuel Inlet Temp, F (C) ............... 140.0 (60.0)
Fuel Tank Capacity, gal (L) ............... 1.85-2.38 (7.0-9.0)
Recommended Fuel Grade ............... Ultra-low sulfur diesel EN 590 or ASTM D 975
Allowed Bio-fuel Blend Fraction ............... B7 maximum operational threshold standard
Fuel Consumption at Full Load, g/kWh (lb/hph) ............... 215.0 (0.353)
Fuel Consumption at Rated Speed, gph (L/h) ............... 0.58-0.69 (2.2-2.6)
Injection Pipe Internal Diameter, in (mm) ............... 0.079 (2.0) thick-walled line
Injection Pipe External Diameter, in (mm) ............... 0.236 (6.0)
Injection Line Length, in (mm) ............... 11.81 (300.0) uniform volume calibration
Fuel Tank Drain Plug Seating ............... Threaded metal plug with copper crush ring
Bleeder Valve Thread Size ............... M8 x 1.0 direct venting port
Governing System ............... Mechanical centrifugal flyweight speed governor
Governor Regulation ............... Class A1 speed regulation accuracy
Governor Spill Port Timing Clearance, in (mm) ............... 0.039-0.047 (1.0-1.2)
Max Permitted Fuel System Vacuum, inHg (bar) ............... 1.48 (0.05)

Dimensions and Weight

Overall Length, in (mm) ............... 17.0 (430)
Overall Width, in (mm) ............... 18.6 (475)
Overall Height, in (mm) ............... 23.2 (590)
Dry Weight with Crankhandle Start, lbs (kg) ............... 214 (97)
Dry Weight with Electric Starter, 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) ............... 1.06 (1.0)

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 1D81S Specs
  
• Hatz 1D81Z Specs
  
• Hatz 2G30 Specs
  

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