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Hatz 1B30E Engine

The Hatz 1B30E is a heavy-duty, compact single-cylinder, four-stroke diesel engine belonging to the Hatz B-series E1 family. Engineered for both mobile and stationary industrial applications, this lightweight powerhouse features a die-cast light alloy crankcase and cylinder head. What sets the "E" designation apart from standard mechanical models is its integration of an electronic control unit (ECU) and electronic governor. This allows full variable speed management via the standard J1939 CAN bus protocol, delivering enhanced diagnostics and superior emissions efficiency. The engine is certified to strict EPA Tier IV Final and EU Stage V emission compliance standards.

The engine utilizes a conventional overhead valve (OHV) arrangement featuring an upright cylinder layout. Valve timing is driven mechanically by a single camshaft, transmitting motion via a finger follower, push rods, and rocker arms. The total displacement of the cylinder is 0.347 liters (347 cc). This volume is achieved with a factory cylinder bore of 80 mm combined with a piston stroke of 69 mm. The calculated static compression ratio for this configuration is 21.5:1 to 22:1.

Fuel System: Unlike mechanical direct-injection variants, the 1B30E employs an electronically controlled direct injection system managed by the engine control unit. Fuel is drawn from a 5.0-liter tank through an inline water separator equipped with an inspection window. The ECU dictates precise injector pulse timing to maximize thermal efficiency and minimize soot. The fuel delivery circuit is engineered to operate seamlessly with standard diesel fuel matching EN 590, ASTM D 975, or synthetic XTL/HVO alternative fuel designations.

Engine lubrication is managed through a fully pressurized oil system. An integrated oil pump draws oil through a main-flow fine filter mesh to protect internal bearing surfaces. Thermal regulation is achieved via a forced-air cooling framework. An integrated cooling fan forces ambient air across the external cooling fins of the light-alloy cylinder head and block. The engine shroud assembly must maintain structural integrity to restrict the maximum temperature rise beneath the cowling to between 8C and 10C above ambient air conditions.

General Technical Data

Engine Specifications

Engine Model ............... Hatz 1B30E
Engine Type ............... 4-stroke single-cylinder direct injection air-cooled diesel
Number of Cylinders ............... 1
Engine Bore, in (mm) ............... 3.15 (80.0)
Engine Stroke, in (mm) ............... 2.72 (69.0)
Displacement, cu.in (cc) ............... 21.17 (347.0)
Rated Engine Power, hp (kW) ............... 2.8-6.0 (2.1-4.5)
Rated Engine Speed, rpm ............... 2500-3600
Peak Torque ............... 10.84 lb-ft (14.7 Nm) at 3600 rpm
Idle Speed ............... 900-1000 rpm
Aspiration Type ............... Naturally Aspirated
Operating Speed ............... 3600 rpm
Compression Ratio ............... 20.5:1-22.0:1
Cylinder Block Type ............... Die-cast light alloy crankcase
Cylinder Head Type ............... Light alloy cylinder head
Lubrication System ............... Forced lubrication system with oil pump
Oil Pump Type ............... Flywheel gear-driven trochoid pump
Oil Filter Type ............... Cleanable mesh oil screen filter
Cooling System ............... Air-cooled via axial cooling fan
Air Cleaner Type ............... Dry air filter with integrated pre-cleaner
Starting System ............... Electric Starter 12V with Electronic Control Unit
Electrical System ............... 12V DC with J1939 CAN bus protocol

Fuel System

Injection Method ............... Direct injection with multi-hole nozzle
Injection Pump Type ............... High pressure unit injection pump
Governor Type ............... Electronic variable speed control governor
Fuel Feed Pump ............... Mechanical diaphragm lift pump
Fuel Filter Type ............... Spin-on inline cartridge fuel filter
Fuel Tank Capacity, gal (L) ............... 1.32 (5.0)
Approved Fuel Types ............... Ultra low sulfur diesel EN 590, ASTM D 975, BS 2869
Alternative Fuel Capacity ............... HVO and XTL paraffinic fuels EN 15940
Fuel Supply Return ............... Integrated internal return line to tank
Maximum Fuel Suction Height, in (mm) ............... 39.37 (1000.0)
Maximum Fuel Temperature, F (C) ............... 140.0 (60.0)
Injection Pressure, psi (bar) ............... 3625.94 (250.0)

Dimensions and Weight

Overall Length, in (mm) ............... 15.6 (395)
Overall Width, in (mm) ............... 16.2 (410)
Overall Height, in (mm) ............... 18.0 (460)
Dry Weight, lbs (kg) ............... 91 (41)

Maintenance Data

Service Information

Compression Pressure (Nominal), psi (bar) ............... 435-507 (30.0-35.0)
Compression Pressure (Minimum), psi (bar) ............... 348 (24.0)
Oil Pressure at Idle Speed, psi (bar) ............... 8.7 (0.6)
Oil Pressure at Rated Speed, psi (bar) ............... 36.2-58.0 (2.5-4.0)
Oil Temperature Maximum, F (C) ............... 284 (140)
Intake Valve Clearance, Cold, in (mm) ............... 0.0039 (0.10)
Exhaust Valve Clearance, Cold, in (mm) ............... 0.0039 (0.10)

Engine Oil

Engine Oil Type .................. SAE 10W-40, SAE 10W-30, or 15W-40
API Service Classifications ......................... CF, CH-4, CK-4, CJ-4
Engine Oil Sump Capacity (Minimum), qt (L) ............... 0.95 (0.9)
Engine Oil Sump Capacity (Maximum), qt (L) ............... 1.16 (1.1)

Service Intervals

Change engine oil ............... Every 250 hours
Clean oil filter ............... Every 1000 hours
Replace air cleaner ............... Every 500 hours
Replace fuel filter ............... Every 500 hours
Valve clearance adjustment ............... Every 250 hours
Fuel system inspection ............... Every 250 hours
Check battery ............... Every 250 hours
Inspect breather valve ............... Every 1000 hours

Service Specifications

Cylinder Bore Inside Diameter, in (mm) ............... 3.1496-3.1504 (80.000-80.020)
Cylinder Bore Wear Maximum Limit, in (mm) ............... 3.1535 (80.100)
Cylinder Bore Out-of-Round Max, in (mm) ............... 0.0011 (0.030)
Connecting Rod Small End Bushing I.D, in (mm) ............... 0.8665-0.8669 (22.010-22.020)
Crankshaft Main Journal Diameter, in (mm) ............... 1.7712-1.7718 (44.988-45.002)
Crankpin Journal Diameter, in (mm) ............... 1.5743-1.5749 (39.988-40.000)
Connecting Rod Big End Bearing Clearance, in (mm) ............... 0.0011-0.0027 (0.030-0.070)
Crankshaft Axial End Play, in (mm) ............... 0.0039-0.0118 (0.100-0.300)
Piston Skirt Outer Diameter, in (mm) ............... 3.1472-3.1480 (79.940-79.960)
Piston to Cylinder Bore Clearance, in (mm) ............... 0.0015-0.0031 (0.040-0.080)
Piston Pin to Small End Bushing Clearance, in (mm) ............... 0.0003-0.0010 (0.010-0.026)
Piston Pin Bore Outer Diameter, in (mm) ............... 0.8661-0.8664 (22.000-22.006)
Piston Pin Outer Diameter, in (mm) ............... 0.8659-0.8661 (21.994-22.000)
Top Ring Groove Width, in (mm) ............... 0.0602-0.0610 (1.530-1.550)
Second Ring Groove Width, in (mm) ............... 0.0602-0.0610 (1.530-1.550)
Oil Ring Groove Width, in (mm) ............... 0.1193-0.1201 (3.030-3.050)
Top Ring Side Clearance, in (mm) ............... 0.0019-0.0035 (0.050-0.090)
Second Ring Side Clearance, in (mm) ............... 0.0011-0.0027 (0.030-0.070)
Top Ring End Gap, in (mm) ............... 0.0098-0.0157 (0.250-0.400)
Second Ring End Gap, in (mm) ............... 0.0118-0.0177 (0.300-0.450)
Oil Ring End Gap, in (mm) ............... 0.0098-0.0177 (0.250-0.450)
Intake Valve Stem Outer Diameter, in (mm) ............... 0.2354-0.2360 (5.980-5.995)
Exhaust Valve Stem Outer Diameter, in (mm) ............... 0.2346-0.2352 (5.960-5.975)
Valve Guide Inside Diameter, in (mm) ............... 0.2362-0.2370 (6.000-6.020)
Intake Valve Stem to Guide Clearance, in (mm) ............... 0.0002-0.0015 (0.005-0.040)
Exhaust Valve Stem to Guide Clearance, in (mm) ............... 0.0009-0.0023 (0.025-0.060)
Valve Seat Angle, degrees ............... 45
Valve Face Angle, degrees ............... 45
Valve Sink Depth, in (mm) ............... 0.0275-0.0354 (0.700-0.900)
Valve Spring Free Length, in (mm) ............... 1.4173 (36.000)
Camshaft Journal Diameter, in (mm) ............... 0.7871-0.7877 (19.993-20.008)
Camshaft Bearing Bore Diameter, in (mm) ............... 0.7881-0.7893 (20.020-20.050)
Cam Lobes Height (Intake), in (mm) ............... 1.2992-1.3031 (33.000-33.100)
Cam Lobes Height (Exhaust), in (mm) ............... 1.2992-1.3031 (33.000-33.100)

Tightening Torques

Cylinder Head Nuts, lb-ft (Nm) ............... 21.4-22.9 (29.0-31.0)
Connecting Rod Big End Cap Bolts, lb-ft (Nm) ............... 23.6-25.8 (32.0-35.0)
Flywheel Central Nut, lb-ft (Nm) ............... 59.0-62.7 (80.0-85.0)
Crankcase Main Cover Bolts (M8), lb-ft (Nm) ............... 16.2-18.4 (22.0-25.0)
Crankcase Main Cover Bolts (M6), lb-ft (Nm) ............... 7.3-8.8 (10.0-12.0)
Engine Oil Drain Sump Plug, lb-ft (Nm) ............... 36.9 (50.0)
Rocker Arm Shaft Support Bracket Bolt, lb-ft (Nm) ............... 8.8-10.3 (12.0-14.0)
Cylinder Head Valve Cover Nuts, lb-ft (Nm) ............... 6.6-8.1 (9.0-11.0)
Injection Pump Flange Mounting Nuts, lb-ft (Nm) ............... 16.2-18.4 (22.0-25.0)
Injection Nozzle Clamp Holder Bolt, lb-ft (Nm) ............... 11.0-12.5 (15.0-17.0)
Fuel High Pressure Line Union Nuts, lb-ft (Nm) ............... 18.4-22.1 (25.0-30.0)
Fuel Tank Base Mounting Support Brackets, lb-ft (Nm) ............... 16.2-18.4 (22.0-25.0)
Exhaust Manifold Retention Nuts, lb-ft (Nm) ............... 16.2-18.4 (22.0-25.0)
Intake Manifold Flange Screws, lb-ft (Nm) ............... 7.3-8.8 (10.0-12.0)
Starter Motor Flange Mounting Bolts, lb-ft (Nm) ............... 33.2-36.9 (45.0-50.0)
Voltage Regulator Module Screws, lb-ft (Nm) ............... 2.9-4.4 (4.0-6.0)
Air Blower Cooling Fan Housing Screws, lb-ft (Nm) ............... 5.9-7.3 (8.0-10.0)
Governor Housing Cover Fasteners, lb-ft (Nm) ............... 7.3-8.8 (10.0-12.0)
Decompression Control Shaft Lever Bolt, lb-ft (Nm) ............... 5.9-7.3 (8.0-10.0)
Speed Control Lever Friction Adjustment Nut, lb-ft (Nm) ............... 8.8-11.0 (12.0-15.0)
Oil Pressure Sensor Indicator Switch Unit, lb-ft (Nm) ............... 10.3-12.5 (14.0-17.0)
Breather Valve Cover Plate Screws, lb-ft (Nm) ............... 2.9-4.4 (4.0-6.0)
Air Filter Housing Main Mount Nut, lb-ft (Nm) ............... 5.9-7.3 (8.0-10.0)
Recoil Starter Assembly Mounting Bolts, lb-ft (Nm) ............... 5.9-7.3 (8.0-10.0)
Crankshaft Timing Gear Wheel Screw, lb-ft (Nm) ............... 33.2-36.9 (45.0-50.0)
Camshaft Thrust Washers Mounting Screws, lb-ft (Nm) ............... 7.3-8.8 (10.0-12.0)
Flywheel Housing Ring Gear Screws, lb-ft (Nm) ............... 16.2-18.4 (22.0-25.0)
Rigid Foundation Base Fasteners, lb-ft (Nm) ............... 29.5-33.2 (40.0-45.0)
Electronic Control Unit Module Vibration Screws ............... 5.2-6.6 lb-ft (7.0-9.0 Nm)
CAN Bus Protocol Wiring Harness Interface Junction Clip ............... 2.2-3.7 lb-ft (3.0-5.0 Nm)

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• Hatz Engines Specs
  
• Hatz 1B20 Specs
  
• Hatz 1B20-6 Specs
  
• Hatz 1B30 Specs
  
• Hatz 1B40 Specs
  
• Hatz 1B50 Specs
  
• Hatz 1B50E Specs
  

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