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Hatz 2G30 Engine

General Technical Data

Engine Specifications

Engine Model ............... Hatz 2G30
Engine Type ............... 4-cycle inline 2-cylinder direct injection air-cooled diesel
Number of Cylinders ............... 2
Engine Bore, in (mm) ............... 3.46 (88.0)
Engine Stroke, in (mm) ............... 2.95 (75.0)
Displacement, cu.in (L) ............... 55.65 (0.912)
Rated Engine Power, hp (kW) ............... 17.56 (13.1) at 2500 rpm
Rated Engine Speed, rpm ............... 1500-3000
Peak Torque ............... 36.9 lb-ft (50.0 Nm) at 2000 rpm
Idle Speed ............... 850-950 rpm
Aspiration Type ............... Naturally Aspirated
Operating Speed ............... 2500 rpm
Compression Ratio ............... 18.0:1
Firing Order ............... 1-2
Cylinder Block Type ............... Diecast aluminum alloy with cast iron liners
Cylinder Head Type ............... Individual light alloy heads
Lubrication System ............... Pressure circulating lubrication system
Oil Pump Type ............... Gear-driven gear pump
Oil Filter Type ............... Replaceable main flow spin-on element
Cooling System ............... Forced air axial cooling blower
Water Pump Type ............... None, air-cooled configuration
Air Cleaner Type ............... Dry type element with mechanical maintenance indicator
Starting System ............... Electric starter or optional manual crank handle
Electrical System ............... 12V with integrated flywheel alternator

Fuel System

Injection Pump Type ............... Bosch discrete single-unit injection pumps
Number of Injection Pump ............... 2
Governor Type ............... Centrifugal mechanical governor
Static Injection Pressure, psi (bar) ............... 3625.9 (250.0)
Injection Timing Setting ............... Adjustable via precision metal shims under pump housing
Fuel Injection Nozzle ............... Multi-hole nozzle configuration
Fuel Feed Pump Type ............... Mechanical plunger type driven via camshaft lobe
Fuel Feed Line Diameter, in (mm) ............... 0.31 (8.0)
Fuel Return Line Diameter, in (mm) ............... 0.23 (6.0)
Fuel Filter Type ............... High capacity spin-on cartridge filter element
Fuel Pre-Filter Type ............... Inline strainer mesh screen
Fuel Tank Capacity, gal (L) ............... External supply or application dependent custom tank mounting
Maximum Fuel Lift Height, ft (m) ............... 3.28 (1.0)
Fuel Grade Requirement ............... Standard premium automotive grade low sulfur diesel fuel
Fuel Lift Pump Pressure, psi (bar) ............... 4.35-7.25 (0.30-0.50)
Bleeding Valve Configuration ............... Manual screw type on top of fuel pump assembly housing
Extra Fuel Start Device ............... Integrated mechanical fuel enrichment for sub-freezing operations
Stop Control Mechanism ............... Mechanical shutdown lever or 12V electrical solenoid assembly

Dimensions and Weight

Overall Length, in (mm) ............... 20.3 (515)
Overall Width, in (mm) ............... 18.7 (475)
Overall Height, in (mm) ............... 21.1 (535)
Dry Weight with Electric Starter, lbs (kg) ............... 188 (85)
Dry Weight with Manual Crankhandle, lbs (kg) ............... 157 (71)

Maintenance Data

Service Information

Oil Pressure at High Speed, psi (bar) ............... 43.5-65.2 (3.0-4.5)
Oil Pressure at Idle Speed, psi (bar) ............... 8.7 (0.6)
Oil Crankcase Temperature Range, F (C) ............... 176.0-230.0 (80.0-110.0)
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 5W-40, SAE 10W-30, 15W-40
API Service Classifications ......................... CD, CE, or CF4
Engine Oil Sump Capacity, qt (L) ............... 2.64-3.17 (2.50-3.00)
Minimum Engine Oil Capacity, qt (L) ............... 1.76 (1.67)

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) ............... 3.4645-3.4653 (88.000-88.022)
Cylinder Bore Maximum Wear Limit, in (mm) ............... 3.4692 (88.12)
Crankshaft Main Bearing Journal Diameter, in (mm) ............... 2.1653-2.1661 (55.000-55.020)
Crankshaft Main Bearing Clearance, in (mm) ............... 0.0015-0.0031 (0.040-0.080)
Connecting Rod Journal Diameter, in (mm) ............... 1.9685-1.9692 (50.000-50.018)
Connecting Rod Bearing Clearance, in (mm) ............... 0.0011-0.0027 (0.030-0.070)
Crankshaft Axial End Play, in (mm) ............... 0.0039-0.0078 (0.10-0.20)
Piston Skirt Outer Diameter, in (mm) ............... 3.4606-3.4614 (87.900-87.920)
Piston to Cylinder Bore Clearance, in (mm) ............... 0.0031-0.0047 (0.080-0.120)
Piston Pin Bore Inner Diameter, in (mm) ............... 0.9842-0.9848 (25.000-2.5015)
Piston Pin Outer Diameter, in (mm) ............... 0.9838-0.9841 (24.990-24.996)
Top Ring Groove Width, in (mm) ............... 0.0787-0.0795 (2.000-2.020)
Second Ring Groove Width, in (mm) ............... 0.0787-0.0795 (2.000-2.020)
Oil Ring Groove Width, in (mm) ............... 0.1574-0.1582 (4.000-4.020)
Top Ring End Gap, in (mm) ............... 0.0098-0.0157 (0.25-0.40)
Second Ring End Gap, in (mm) ............... 0.0098-0.0157 (0.25-0.40)
Oil Ring End Gap, in (mm) ............... 0.0078-0.0157 (0.20-0.40)
Cylinder Head Deck Flatness Max Distortion, in (mm) ............... 0.0019 (0.05)
Valve Guide Inside Diameter, in (mm) ............... 0.2755-0.2763 (7.000-7.022)
Intake Valve Stem Outer Diameter, in (mm) ............... 0.2740-0.2746 (6.960-6.975)
Exhaust Valve Stem Outer Diameter, in (mm) ............... 0.2732-0.2738 (6.940-6.955)
Intake Valve Stem to Guide Clearance, in (mm) ............... 0.0009-0.0024 (0.025-0.062)
Exhaust Valve Stem to Guide Clearance, in (mm) ............... 0.0017-0.0032 (0.045-0.082)
Valve Seat Depression Depth, in (mm) ............... 0.0275-0.0433 (0.70-1.10)
Valve Spring Free Lenght, in (mm) ............... 1.496 (38.0)
Camshaft Bearing Journal Diameter, in (mm) ............... 1.5748-1.5755 (40.000-40.018)
Camshaft Journal Clearance, in (mm) ............... 0.0007-0.0023 (0.020-0.060)

Tightening Torques

Cylinder Head Nuts, lb-ft (Nm) ............... 40.56 (55.0)
Connecting Rod Cap Screws, lb-ft (Nm) ............... 29.50 (40.0)
Main Bearing Housing Bolts, lb-ft (Nm) ............... 36.87 (50.0)
Flywheel Center Nut, lb-ft (Nm) ............... 110.63 (150.0)
Counterweight Balancer Mass Bolts, lb-ft (Nm) ............... 25.81 (35.0)
Camshaft Thrust Flange Screws, lb-ft (Nm) ............... 7.37 (10.0)
Cylinder Head Valve Cover Capscrews, lb-ft (Nm) ............... 6.63 (9.0)
Rocker Arm Shaft Stand Support Nuts, lb-ft (Nm) ............... 18.43 (25.0)
Fuel Injection Pump Flange Nuts, lb-ft (Nm) ............... 18.43 (25.0)
Fuel Injector Clamping Yoke Nut, lb-ft (Nm) ............... 14.75 (20.0)
High Pressure Fuel Line Flare Gland Nuts, lb-ft (Nm) ............... 18.43 (25.0)
Oil Pressure Alert Switch Sensor, lb-ft (Nm) ............... 11.06 (15.0)
Oil Sump Drain Plug, lb-ft (Nm) ............... 36.87 (50.0)
Oil Sump Governor Drain Plug, lb-ft (Nm) ............... 29.50 (40.0)
Oil Filter Riser Tube Central Fitting, lb-ft (Nm) ............... 22.12 (30.0)
Exhaust Manifold Flange Copper Nuts, lb-ft (Nm) ............... 16.22 (22.0)
Intake Manifold Flange Screws, lb-ft (Nm) ............... 8.85 (12.0)
Flywheel Blower Shroud Air Guide Screws, lb-ft (Nm) ............... 6.63 (9.0)
Starter Motor Housing Mounting Bolts, lb-ft (Nm) ............... 33.19 (45.0)
Integrated Alternator Stator Core Screws, lb-ft (Nm) ............... 5.16 (7.0)
Centrifugal Governor Weight Locking Nut, lb-ft (Nm) ............... 25.81 (35.0)
Speed Control Assembly Lever Pivot Nut, lb-ft (Nm) ............... 8.85 (12.0)
Crankcase Split Line Assembly Bolts, lb-ft (Nm) ............... 18.43 (25.0)
Timing Gear Cover Panel Screws, lb-ft (Nm) ............... 7.37 (10.0)
Breather Valve Chamber Screws, lb-ft (Nm) ............... 4.42 (6.0)
Oil Pump Housing Cover Mounting Screws, lb-ft (Nm) ............... 7.37 (10.0)
Lifting Eyebolt Anchorage Points, lb-ft (Nm) ............... 29.50 (40.0)
Engine Support Foot Bracket Bolts, lb-ft (Nm) ............... 51.62 (70.0)
Accessory Drive Pulley Flywheel Hub Screws, lb-ft (Nm) ............... 22.12 (30.0)
Fuel Feed Pump Housing Stud Nuts, lb-ft (Nm) ............... 11.06 (15.0)

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