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Operating and Maintenance Manual
Limbach L 2000
Engine for Powered Gliders and
Very Light Aircraft
Edition: 01.03.2016
This manual is approved in accordance with the procedures of the EASA approved develop-
ment organization No. EASA.21J.270.
Approval and translation has been done by best knowledge and judgement. - In any
case the original text (P/N 201.253.900.000) in german language is authoritative.
Limbach Flugmotoren GmbH & Co. KG
Kotthausener Str. 5
D-53639 Königswinter, Germany
Tel. ++49-2244-9201-0
Fax ++49-2244-9201-30
www.limflug.de
© Limbach Flugmotoren GmbH & Co. KG
201.253.905.000
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Summary of Contents for LIMBACH L 2000 EA
- Page 1 Approval and translation has been done by best knowledge and judgement. - In any case the original text (P/N 201.253.900.000) in german language is authoritative. Limbach Flugmotoren GmbH & Co. KG Kotthausener Str. 5 D-53639 Königswinter, Germany Tel. ++49-2244-9201-0 Fax ++49-2244-9201-30 www.limflug.de © Limbach Flugmotoren GmbH & Co. KG 201.253.905.000...
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Page 2: Table Of Contents
LIMBACH L 2000 EC ..........................15 LIMBACH L 2000 DA ..........................16 Performance ..............................18 Performance Graph LIMBACH L 2000 E0 and L 2000 EC ............... 18 Performance Graph LIMBACH L 2000 EA ....................19 Performance Graph LIMBACH L 2000 EB ....................20 Performance Graph LIMBACH L 2000DA .................... - Page 3 Operating Manual L 2000 8.15 Drive Belt check, stretching and replacement ................... 35 8.16 Exhaust System Check ..........................36 8.17 Bowden Cable Check..........................36 8.18 Harness Check ............................36 8.19 Check of Bolted Connections ........................36 8.20 Engine Test Run ............................37 8.21 Engine Preservation ...........................
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Page 4: Change Index
Operating Manual L 2000 Change Index This Edition replaces the Operating and Maintenance Manual from 07/92. This manual has 48 pages and is issued per 01.03.2016 This edition replaces: Date Description 07/92 New edition 01.03.2016 Replaces edition from 07/92 Release Relased and approved on: 01.03.2016 Dipl.-Ing. -
Page 5: Introduction
Operating Manual L 2000 Introduction This manual is meant to instruction for proper operation and maintenance of the aircraft engine. Modifications to the engine are only permitted with the approval of our development department. Caution: The specially identifies safety notes must be observed to prevent accidents with personal injuries and to prevent damage to the engine. -
Page 6: Engine Description
Alternator • Mechanical Fuel Pump • Constant Pressure Carburetor Model Designation 2000 1. LIMBACH (Manufacturer) 2. Displacement Class in cm 3 3. (E) Single Ignition (D) Dual Ignition 4. Equipment - Basic Type of Construction Tractor Propeller Carburetor rear, bottom... - Page 7 Operating Manual L 2000 Type of Propeller Flange Flange for Variable-Pitch Propeller Flange for Fixed-Pitch Propeller 6 + 7. Installation Type Differences with regard to installation related changes Experimental Engine without Certification AA = Variant for powered glider GROB G 109 AB = Variant for powered glider VALENTIN TAIFUN AC = Variant for powered glider HOFFMANN H 36 DIMONA Page: 7/48...
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Page 8: Cylinder Designation
Operating Manual L 2000 Cylinder Designation front = propeller side right rear = accessory mounting side left cylinder 1 cylinder 2 cylinder 3 cylinder 4 Page: 8/48 Edition: 01.03.2016... -
Page 9: Technical Data
Operating Manual L 2000 Technical Data LIMBACH L 2000 E0 Dimensions Bore 90 mm Stroke 78,4 mm Displacement per Cyl. 498,5 cm³ Total Displacement 1994 cm³ Compression Ratio 8,4 : 1 Crankshaft Rotation counterclockwise Magneto Timing 30° BTC Firing Order... - Page 10 Operating Manual L 2000 Max. Take-Off Power 59 kW / 80 shp @ 3400 RPM Max. Continuous Power 51 kW / 70 shp @ 3000 RPM Engine Rotational Speeds Max. permissible speed 3400 RPM Max. speed for cruise See flight and maintainance manual of airframe manufacturer.
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Page 11: Limbach L 2000 Ea
Operating Manual L 2000 LIMBACH L 2000 EA Dimensions Bore 90 mm Stroke 78,4 mm Displacement per Cyl. 498,5 cm³ Total Displacement 1994 cm³ Compression Ratio 8,6 : 1 Crankshaft Rotation counterclockwise Magneto Timing 30° BTC Firing Order 1-3-2-4 Equipment... - Page 12 Operating Manual L 2000 Engine Ratings Max. Take-Off Power 59 kW / 80 shp @ 3400 RPM Max. Continuous Power 51 kW / 70 shp @ 3000 RPM Engine Rotational Speeds: Max. permissible speed 3400 RPM Max. speed for cruise See flight and maintainance manual of airframe manufacturer.
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Page 13: Limbach L 2000 Eb
Operating Manual L 2000 LIMBACH L 2000 EB Dimensions Bore 90 mm Stroke 78,4 mm Displacement per Cyl. 498,5 cm³ Total Displacement 1994 cm³ Compression Ratio 8,4 : 1 Crankshaft Rotation counterclockwise Magneto Timing 30° BTC Firing Order 1-3-2-4 Equipment... - Page 14 Operating Manual L 2000 Engine Ratings Max. Take-Off Power 59 kW / 80 shp @ 3400 RPM Max. Continuous Power 53 kW / 72 shp @ 3000 RPM Engine Rotational Speeds Max. permissible speed 3400 RPM Max. speed for cruise See flight and maintainance manual of airframe manufacturer.
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Page 15: Limbach L 2000 Ec
Operating Manual L 2000 LIMBACH L 2000 EC The technical data of the LIMBACH L 2000 EC model are identical to the technical data of the LIMBACH L 2000 E0 model. "C" indicates the changes concerning the axial bearing for rear engine installation (pusher propellers). -
Page 16: Limbach L 2000 Da
Operating Manual L 2000 LIMBACH L 2000 DA Dimensions Bore 90 mm Stroke 78,4 mm Displacement per Cyl. 498,5 cm³ Total Displacement 1994 cm³ Compression Ratio 8,5 : 1 Crankshaft Rotation counterclockwise Magneto Timing 25° BTC Firing Order 1-3-2-4 Equipment... - Page 17 Operating Manual L 2000 Engine Ratings Max. Take-Off Power 55 kW / 75 shp @ 3200 RPM Max. Continuous Power 51 kW / 70 shp @ 3000 RPM Engine Rotational Speeds Max. permissible speed 3400 RPM Max. speed for cruise See flight and maintainance manual of airframe manufacturer.
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Page 18: Performance
Operating Manual L 2000 Performance Performance Graph LIMBACH L 2000 E0 and L 2000 EC Page: 18/48 Edition: 01.03.2016... -
Page 19: Performance Graph Limbach L 2000 Ea
Operating Manual L 2000 Performance Graph LIMBACH L 2000 EA Page: 19/48 Edition: 01.03.2016... -
Page 20: Performance Graph Limbach L 2000 Eb
Operating Manual L 2000 Performance Graph LIMBACH L 2000 EB Page: 20/48 Edition: 01.03.2016... -
Page 21: Performance Graph Limbach L 2000Da
Operating Manual L 2000 Performance Graph LIMBACH L 2000DA Page: 21/48 Edition: 01.03.2016... -
Page 22: Operating Instructions
Operating Manual L 2000 Operating Instructions Strict adherence to the information contained in this operating manual is the basis for undisturbed operation of your engine. Before Starting Perform daily check (see section 7.1) Move power lever to throttle full open position. Check for interference and free movement between the idle cutoff and full open stops at the carburator. -
Page 23: Runup, Performance Check
Operating Manual L 2000 Disengage choke. Check oil pressure (must increase within 10 sec.). Runup, Performance Check Run the engine for approx. 2 min. at 1000 - 1200 RPM. Then increase speed to 1500 RPM until oil temperature is 50 °C. Due to the sluggish action of the indication, there will be sufficient effective operating temperature at 50 °C already. -
Page 24: Engine Shut-Down
As a remedy we recommend retrofitting an additional electric fuel pump. Please consult your aircraft manufacturer for additional information. In general only such fuels approved by Limbach shall be used (see section 10.2) Page: 24/48 Edition: 01.03.2016... -
Page 25: Maintenenance Schedule
Operating Manual L 2000 Maintenenance Schedule Maintenance at Limbach aircraft engines is to be performed after fixed time periods or when reaching a certain interval of operating hours. In addition, a "daily check" has to be performed before each flight. -
Page 26: Operating Time Related Inspections
7.3.2 After the first 25 Operating hours Work as specified in Chapter 7.3.4 7.3.3 Every 25 Operating hours Grease magneto couplings. Applicable to all engines except L 2000 EA, DA. 7.3.4 Every 50 Operating hours Check fuel and lubrication system. ... -
Page 27: Every 100 Operating Hours
Operating Manual L 2000 7.3.5 Every 100 Operating hours Check carburetor diaphragm of the Stromberg-Zenith carburetor. Check magneto timing and adjust, if necessary. Clean fuel pump screen. Work as specified in section 7.3.4 7.3.6 Every 250 Operating hours ... -
Page 28: Maintenence Instructions
Operating Manual L 2000 Maintenence Instructions This chapter describes the performance of maintenance work. In addition, the preservation of engines as well as winter and tropical operation is covered. Repair activities during engine maintenance may only be performed by authorized persons. Caution: Disconnect spark plug connectors before performing any work on the engine. -
Page 29: Cleaning Of Air Filter
Operating Manual L 2000 Cleaning of Air Filter Remove induction air filter. Clean air filter. Replace dry air filter (cloth filter). Wash oil-wetted air filter (wire screen) in gasoline, clean it off by using compressed air and wet with oil. Special filters are to be cleaned according to the aircraft manufacturer's instructions. -
Page 30: Carburetor Oil Level Check
Operating Manual L 2000 Carburetor Oil level check Unscrew piston damper. Check oil level and correct as necessary. Oil level should be approx. 4 mm below the top edge of the piston guide (the piston guide has two opposite notches at the top edge).For refilling, use carburetor damper oil only (P/N: 170.210.005). -
Page 31: Engines With Limbach Fuel Pump
Operating Manual L 2000 8.7.2 Engines with Limbach Fuel Pump Close fuel shutoff valve. Disconnect fuel lines from pump. Disassemble top of the fuel pump (6 screws). Collect any fuel dripping from the pump. Disassemble valve assy from top of fuel pump with a suitable tool. -
Page 32: Fuel Filter Cleaning
Operating Manual L 2000 Attach top of the fuel pump and tighten screws. Reassemble fuel hoses with new gaskets and sealing rings. Tighten hollow bolts and secure with safety wire. Open fuel valve. Perform test run and check for leaks. Fuel Filter cleaning Draining and cleaning of fuel filter. -
Page 33: Check Of Valve Shaft Projecting Length
Operating Manual L 2000 Remove valve cover. Valve clearance check. Turn propeller according to engine rotation until the valves of the second cylinder are overlapping. Now, the valve clearance of the first cylinder may be checked (see cylinder designation at page 3.2). Move thickness gauge between valve shaft and setscrew. -
Page 34: Cleaning, Check And Setting Of Spark Plugs
Operating Manual L 2000 Check valve clearance and readjust, if necessary. Mount cylinder head cover. Check gaskets and replace as necessary. 8.14 Cleaning, Check and Setting of Spark Plugs Removal of spark plugs. Disconnect spark plug connectors. Unscrew connectors on shielded spark plugs. Caution: Do not unscrew spark plugs when the engine is hot. -
Page 35: Drive Belt Check, Stretching And Replacement
Operating Manual L 2000 Velvet black: Electrode gap too big Mixture too rich Lack of air (induction air filter contaminated) Engine does not reach required temperature Oillike glossy: Interrupted spark plug operation Excess oil in combustion chamber ... -
Page 36: Exhaust System Check
Operating Manual L 2000 Rear mounted alternator and accessory housing with drive belt opening of 15 mm of width: Remove engine. Demount starter. Demount alternator. Demount magneto. Remove accessory housing. Replace drive belt. Mount accessory housing. Install starter. Install alternator. Install magneto. -
Page 37: Engine Test Run
Operating Manual L 2000 8.20 Engine Test Run Check of starting performance. At normal conditions (temperature, maintenance condition) the engine starts easily. If this is not the case check fuel supply and ignition system. Caution: Do not operate the starter a prolonged period of time (Risk of overheating). Warming up Run engine for approx. -
Page 38: Operation At Low Ambient Temperatures
Operating Manual L 2000 Removed engine: Remove spark plugs and spray engine oil into the combustion chambers so that the upper part of the cylinder barrel is wetted, too. Crank engine manually or with starter for a few turns. Spray spark plugs with engine oil and install them again. -
Page 39: Operation In Tropical Conditions
Operating Manual L 2000 8.23 Operation in Tropical Conditions The following measures are necessary to protect the engine against heat and dust: Air induction filter If the engine is operated in areas of high dust accumulation install larger air filter (contact your aircraft manufacturer for details). -
Page 40: Overhaul
Operating Manual L 2000 Overhaul Major Overhaul Major overhaul must be performed by the manufacturer or overhaul shops, authorized by the manufacturer. Therefore, the engine has to be forwarded to the manufacturer or an authorized overhaul shop, after the operating time limit has been reached. The permissible operating time (TBO) is determined by the latest issue of Technical Bulletin No. -
Page 41: Lubricants, Coolants, Fuels
Operating Manual L 2000 Lubricants, Coolants, Fuels 10.1 List of Lubricants Do not use ashless dispersant or straight mineral aircraft engine oils! Use only brand name oils according to spezification API-SG, or higher. (eg. API-SH, SI, SJ, S…) as well as one of Volkswagen-specs VW 500 00, VW 501 01 or VW 502 00. As the temperature ranges of adjacent SAE classes are overlapping, there is no need to change the oil for short time temperature variations. -
Page 42: Fuels
Operating Manual L 2000 10.2 Fuels Following fuels are factory approved: • Super Plus 98 fuel according to DIN EN 228, • AVGAS 100 LL, • or other unleaded fuels with a minimum octane rating of 98 RON and 87 MON. Notes: •... -
Page 43: Recommended Tightening Torques
Operating Manual L 2000 Recommended Tightening Torques Oil screen cover to housing 7 Nm Oil drainage screw to oil screen cover 35 Nm Air filter to carburetor (M8) 20 Nm Carburetor to induction pipe 20 Nm Carburetor cover to carburetor 2 Nm Fuel bowl to carburetor 2 Nm... -
Page 44: Trouble Shooting
Operating Manual L 2000 Trouble Shooting "Small", apparently neglectable causes are often responsible for a "big" effect, i.e. disturbance of engine operation. Detection of the causes is not always easy. The hints to possible trouble causes and their correction contained in this section serve as a guideline for the engine user, listing the most frequent faults. -
Page 45: Engine Operating Trouble
Operating Manual L 2000 Possible Cause: Remedy: Fuel tank empty (faulty indication of fuel Refuel, replace fuel gauge. gauge). Fuel valve closed or filter locked. Open fuel valve, clean or replace filter. Fuel line defective or not connected. Replace or connect fuel line. Fuel pump defective. -
Page 46: Ignition
Operating Manual L 2000 Possible Cause: Remedy: Carburetor float defective. Replace float. Carburetor diaphragm defective. Replace diaphragm. Lack of damping oil in carburetor. Refill damping oil. Wrong idling speed. Adjust idling speed. Throttle does not open fully. Repair throttle control. Carburetors not synchronous (2-carburetor Adjust carburetor setting. -
Page 47: Cooling
Operating Manual L 2000 12.2.3 Cooling Possible Cause: Remedy: Insufficient or damaged baffling. Repair or complete baffling. Seal leakages. Carburetor shielding defective or missing Replace carburetor shielding. (2 carburetors). Cooling air inlet disturbance (missing Install spinner, increase air inlets in cowling. spinner, cross section too small). -
Page 48: Mechanical System
Operating Manual L 2000 12.3 Mechanical System Possible Cause: Remedy: No valve clearance. Set valve clearance. Leaking or sticking valve. Repair cylinder head. Note: In some cases, fuel tanks made out of com- posite materials have been proven to be in- compatible with the fuel, thus causing the tank material to dissolve.
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