OPERATOR´S MANUAL LIST OF REVISIONS The owner of the manual enters the date, when he performed the change OPERATOR´S MANUAL required by the revision. Enter bulletin number only for revisions issued as a bulletin CHANGE BULLETIN NEW PAGES SECTION NUMBER REVISION NUMBER NUMBER EDIT. DATE AFFECTED BY REVISION PERFORMED M 337A,AK, M 332A,AK, DATE/SIGNATURE 1. M337AK 12.3.2001 see the list of valid /12a pages M 137A,AZ, M 132A,AK. AIRCRAFT ENGINES Manufacturer: LOM s.p., Praha 10-Malesice, Czech Republic Destination: This OPERATOR´S MANUAL is intended for owners, pilots and maintenance personnel responsible for operation and care of aircrafts powered by M 132/332 and M 137/337 series aircraft engines. Beside engine’s description and performances, this manual sets forth operation instructions and maintenance procedures. Piston engines LOM design-date: CAA-CZ date: 7.4. 1998 21.4.1998 Note.: This is an online copy. By printing or downloading becomes the copy uncontrolled. The user is obliged, before use, to check the official web-page for the latest revision. http://www.pistovemotory.cz/en/support 1.1.1998 i ii 1.1.1998 OPERATOR´S MANUAL INTRODUCTION LIST OF VALID PAGES SECTION PAGE DATE SECTION PAGE DATE SECTION PAGE DATE SECTION PAGE DATE Introduction i 1. 1. 1998 2-16 1. 1. 1998 3-13 1. 1. 1998 5-9 1. 1. 1998 ii 1. 1. 1998 2-17 1. 1. 1998 3-14 1. 1. 1998 5-10 1. 1. 1998 iii 12. 3. 2001 2-18 1. 1. 1998 3-15 1. 1. 1998 5-11 1. 1. 1998 iv 12. 3. 2001 2-19 1. 1. 1998 3-16 1. 1. 1998 5-12 1. 1. 1998 v 1. 1. 1998 2-20 1. 1. 1998 3-17 1. 1. 1998 5-13 12. 3. 2001 vi 1. 1. 1998 2-21 1. 1. 1998 3-18 1. 1. 1998 5-14 1. 1. 1998 vii 12.3.2001 2-22 1. 1. 1998 3-15 1. 1. 1998 viii 1. 1. 1998 2-23 1. 1. 1998 3-16 1. 1. 1998 Periodic 6-1 12. 3. 2001 2-24 1. 1. 1998 3-17 1. 1. 1998 inspections 6-2 1. 1. 1998 General 1-1 1. 1. 1998 2-25 1. 1. 1998 3-18 1. 1. 1998 6-3 1. 1. 1998 1-2 1. 1. 1998 2-26 1. 1. 1998 3-19 1. 1. 1998 6-4 1. 1. 1998 1-3 1. 1. 1998 2-27 1. 1. 1998 3-20 1. 1. 1998 6-5 1. 1. 1998 1-4 without text 2-28 1. 1. 1998 3-21 1. 1. 1998 6-6 12. 3. 2001 Description 2-1 1. 1. 1998 2-29 1. 1. 1998 3-22 1. 1. 1998 6-7 1. 1. 1998 2-2 1. 1. 1998 2-30 1. 1. 1998 6-8 1. 1. 1998 2-3 1. 1. 1998 Operating 4-1 1. 1. 1998 6-9 1. 1. 1998 2-4 1. 1. 1998 Specifications 3-1 1. 1. 1998 substances 4-2 1. 1. 1998 6-10 1. 1. 1998 2-5 1. 1. 1998 3-2 1. 1. 1998 4-3 1. 1. 1998 6-11 1. 1. 1998 2-6 1. 1. 1998 3-3 1. 1. 1998 4-4 without text 6-12 1. 1. 1998 2-7 1. 1. 1998 3-4 1. 1. 1998 6-13 12. 3. 2001 2-8 1. 1. 1998 3-5 1. 1. 1998 Operation 5-1 1. 1. 1998 6-14 1. 1. 1998 2-9 1. 1. 1998 3-6 1. 1. 1998 instructions 5-2 1. 1. 1998 6-15 1. 1. 1998 2-10 1. 1. 1998 3-7 12. 3. 2001 5-3 1. 1. 1998 6-16 1. 1. 1998 2-11 1. 1. 1998 3-8 1. 1. 1998 5-4 1. 1. 1998 6-17 12. 3. 2001 2-12 1. 1. 1998 3-9 1. 1. 1998 5-5 1. 1. 1998 6-18 without text 2-13 1. 1. 1998 3-10 1. 1. 1998 5-6 12. 3. 2001 2-14 1. 1. 1998 3-11 1. 1. 1998 5-7 1. 1. 1998 Maintenance 7-1 1. 1. 1998 2-15 1. 1. 1998 3-12 1. 1. 1998 5-8 1. 1. 1998 procedures 7-2 1. 1. 1998 12.3.2001 iii iv 12.3.2001 INTRODUCTION OPERATOR´S MANUAL SECTION PAGE DATE SECTION PAGE DATE SECTION PAGE DATE 7-3 1. 1. 1998 7-31 1. 1. 1998 9-7 1. 1. 1998 7-4 1. 1. 1998 7-32 1. 1. 1998 9-8 1. 1. 1998 7-5 1. 1. 1998 7-33 1. 1. 1998 9-9 1. 1. 1998 7-6 1. 1. 1998 7-34 1. 1. 1998 9-10 1. 1. 1998 7-7 1. 1. 1998 7-35 1. 1. 1998 9-11 1. 1. 1998 7-8 1. 1. 1998 7-36 1. 1. 1998 9-12 1. 1. 1998 7-9 1. 1. 1998 7-37 1. 1. 1998 9-13 1. 1. 1998 7-10 1. 1. 1998 7-38 without text 9-14 1. 1. 1998 7-11 1. 1. 1998 9-15 1. 1. 1998 7-12 1. 1. 1998 Trouble-shooting 8-1 1. 1. 1998 9-16 1. 1. 1998 7-13 1. 1. 1998 8-2 1. 1. 1998 9-17 1. 1. 1998 7-14 1. 1. 1998 8-3 1. 1. 1998 7-15 1. 1. 1998 8-4 1. 1. 1998 Engine protection 10-1 1. 1. 1998 7-16 1. 1. 1998 8-5 1. 1. 1998 and preparation 10-2 1. 1. 1998 7-17 1. 1. 1998 8-6 1. 1. 1998 10-3 1. 1. 1998 7-18 1. 1. 1998 8-7 1. 1. 1998 10-4 1. 1. 1998 7-19 1. 1. 1998 8-8 1. 1. 1998 10-5 1. 1. 1998 7-20 1. 1. 1998 8-9 1. 1. 1998 10-6 1. 1. 1998 7-21 1. 1. 1998 8-10 1. 1. 1998 10-7 1. 1. 1998 7-22 1. 1. 1998 8-11 1. 1. 1998 10-8 1. 1. 1998 7-23 1. 1. 1998 8-12 without text 10-9 1. 1. 1998 7-24 1. 1. 1998 10-10 1. 1. 1998 7-25 1. 1. 1998 Shipping, 9-1 1. 1. 1998 7-26 1. 1. 1998 storage, 9-2 1. 1. 1998 Tables 11-1 1. 1. 1998 7-27 1. 1. 1998 installation 9-3 1. 1. 1998 11-2 1. 1. 1998 7-28 1. 1. 1998 9-4 1. 1. 1998 11-3 1. 1. 1998 7-29 1. 1. 1998 9-5 1. 1. 1998 11-4 1. 1. 1998 7-30 1. 1. 1998 9-6 1. 1. 1998 1.1.1998 v vi 1.1.1998 INRODUCTION OPERATOR´S MANUAL List of Supplements TABLE OF CONTENS 1. Aircraft engine M337B supplement No. 1 to Operator´s manual Section 1. GENERAL ........................................................................1-1 M337A,AK,M332A,AK,M137A,AZ,M132A,AK engines. Section 2. DESCRIPTION .................................................................2-1 Section 3. SPECIFICATIONS ............................................................3-1 2. Aircraft engine M337C – supplement No. 2 to Operator´s manual M337A,AK,M332A,AK,M137A,AZ,M132A,AK engines. Section 4. OPERATING SUBSTANCES ...........................................4-1 Section 5. OPERATING INSTRUCTIONS ........................................5-1 3. Aircraft engine M332B - supplement No.3 to Operator´s manual M337A,AK,M332A,AK,M137A,AZ,M132A,AK engines. Section 6. PERIODIC INSPECTIONS ...............................................6-1 Section 7. MAINTENANCE PROCEDURES .....................................7-1 This supplements are binding only for uses of corresponding version of aircraft engines - M337B,M332B,M337C. Section 8. TROUBLE-SHOOTING ...................................................8-1 Section 9. SHIPPING, STORAGE, INSTALATION ..........................9-1 Section 10. ENGINE PROTECTION AND PREPARATION .......... 10-1 Section 11. TABLES ....................................................................... 11-1 12.3.2001 vii viii 1.1.1998 GENER AL OPERATOR´S MANUAL 1. WARNING TO OPERATOR’S While operating and maintaining the engine, it is unconditionally necessary to observe exactly the prescriptions in this manual. Neglecting to follow the SECTION 1 operation instructions or the maintenance procedures, such as other prescriptions contained in different sections of this manual, can result in poor engine performance and power loss. Exceeding engine limitations can GENERAL determine engine damage and have detrimental influences upon engine life. The works, required by the maintenance procedures and repair prescriptions in this manual, may only be performed by trained personnel, who meets qualification requirements and is also fully responsible for complete and qualified performed works. 1/ Warning to Operators ................................................................... 1-2 Further information concerning more ample repair procedures, beyond the aim of this manual is contained in the M 337A/AK, M 137A/AZ, M 332A/AK, M132A/AK. engine OVERHAUL MANUAL. Information about assemblies and their part is contained in the SPARE PARTS CATALOGUE of the mentioned 2/ Structure of the Manual, Page and Ilustration numbering ............ 1-2 engines. Information concerning engine installation is contained in the INSTALLATION MANUAL of the mentioned engines. 3/ Manner of Performing Changes in the Manual ............................ 1-3 2. STRUCTURE OF THE MANUAL The manual is divided into 11 sections. The number of each page is always composed of two figures separated by a dash. The first figure indicates the ordinal 4/ Terminology ................................................................................. 1-3 number of the current section, the second figure indicates the ordinal number of the page inside the section. The content of each section is always outlined on the page bearing the ordinal number ´´n-1´´ (n for section number). The illustration numbering is independent for each section and is similar to that of the pages. The numbering begins from 1 upwards and the illustrations are placed inside the text, where they are referred to. 1. 1. 1998 1-1 1-2 1. 1. 1998 GENER AL OPERATOR´S MANUAL 3. MANNER OF PERFORMING CHANGES IN THE MANUAL Revisions of this manual are issued as bulletins approved by the Aviation Authority i.e. the CIVIL AVIATION AUTHORITY of CZECH REPUBLIC (CAA-CR). The manual´s owner will receive a copy of the bulletin with the respective number of affected pages to be replaced and new list of valid pages and revisions. These lists are placed at the beginning of this manual to which they unseparably belong. The revised pages themselves bear a new date of issuance. After receiving the revision and performing the change in his manual, the owner enters the date in the LIST of REVISIONS, when he performed the change, attested by signature. Attention: The owner of the manual is obliged to verify, that the page number and date in his manual correspond to those in the LIST of VALID PAGES. Pages not corresponding to the LIST must be discarded. 4. TERMINOLOGY All location references used in this manual are unitary: - the engine front is the propeller location end. Page without text - the cylinders are numbered in order beginning from the front end, cylinder No. 1 being immediately after propeller. - the engine right-hand and left-hand sides are designated, viewing the engine from rear. The top and bottom designate locations on engine or part ends considering. - the rotational sense of drives and accessories is established while viewing from driving side to driven side. The driven instrument sense of rotation is identical to that of its drive. - the drive ratio is designated by the ratio between the driving part RPM and the driven part RPM. The resulting drive ratio indicates the crankshaft RPM to accessory drive RPM ratio. - the abbreviation TDC, possibly BDC indicates the top/bottom dead center. 1. 1. 1998 1-3 1-4 1.1.998 DESCRIPTIO N OPERATOR´S MANUAL 1. GENERAL SECTION 2 Models M 132A/AK, M 332A/AK, M 137A/AZ and M 337A/AK are air- cooled, in-line inverted four or six-cylinder engines. The propeller is mounted by DESCRIPTION means of the propeller flange on the crankshaft bevel end. The engines are equipped with low-pressure injection pump and disengageable centrifugal compressor (applicable for models M 3nn ). The valves are actuated by a camshaft supported in the camshaft housings mounted on the cylinder heads. The engines M 132AK, M 332AK, M 137A/AZ, M 337AK (see Fig. 2-1) uses aerobatic oil system enabling 1/ General ........................................................................ 2-2 high aerobatics, inverted flights included. 2/ Engine part description ................................................ 2-2 a/ Crankcase ............................................................... 2-2 b/ Crankshaft .............................................................. 2-2 .2. ENGINE PART DESCRIPTION c/ Connecting rods .................................................... 2-3 d/ Pistons ................................................................. 2-3 A. Crankcase e/ Cylinder barrels and heads ..................................... 2-3 The crankcase is composed from the proper crankcase, the top lid and the frontal 3/ Valve operating mechanism ........................................ 2-9 lid. All these parts are magnesium alloy castings. The lids are assembled to the 4/ Induction system ......................................................... 2-9 crankcase by means of studs and nuts and using gaskets. The proper crankcase is 5/ Ignition system ......................................................... 2-20 provided with transversal double walls, where there are located the crankshaft 6/ Oil system ................................................................. 2-22 bearings. At the bottom there are other studs for cylinder barrel and head a/ Pressure oil circuit .................................................. 2-22 assembling. On the lateral side there are flanges for mounting pin assembly and b/ Oil scavenging ....................................................... 2-24 for generator and RPM transmitter drive. The accessory and vertical shaft drive 7/ Crankcase venting ..................................................... 2-27 are located at the rear end. The flanges for supercharger, oil pump and propeller 8/ Cooling system .......................................................... 2-27 governor mounting are at the rear end too. The flanges for magnetos and oil sump are at the rear end on the bottom side. The top lid is provided with three 9/ Engine starting ........................................................... 2-27 hanging eyes and with the crankcase breather. a/ Engine equipped with supercharger ........................ 2-27 b/ Engine without supercharger .................................. 2-27 B. Crankshaft 10/ Accessory drive ......................................................... 2-29 a/ Mechanical RPM indicator drive ............................. 2-29 The crankshaft with four/six cranks is forged from special nitrided steel. The main and connecting rod journals are nitrided. All journals are hollow and together with b/ Electrical RPM indicator drive ............................... 2-29 the canals in the crank arms distribute lubricating oil to the connecting rod main c/ Propeller governor drive ......................................... 2-29 bearing. The holes in journals are obturated by means of plate like obturators. The d/ Generator drive ...................................................... 2-29 crankshaft frontal end is beveled, with groove for key and threaded for the propeller 11/ Engine installation .................................................... 2-29 flange mounting nut. At the crankshaft rear end there are assembled the drive geared wheel and the supercharger drive. The crankshaft is supported on seven slide 12/ Accessories ................................................................ 2-30 bearings. The bearings consist of bearing inserts casted from lead 1. 1. 1998 2-1 2-2 1. 1. 1998 DESCRIPTIO N OPERATOR´S MANUAL bronze and galvanicly lead plated, which are fastened by means of aluminium alloy lids. C. Connecting rods The connecting rods, with the stem in the form of “H” section, are aluminum alloy forgings having burnished surface. The bearing cap is retained on the crankshaft end by means of two bolts. Two bearing inserts, cast from lead bronze, are provided on the crankshaft end. The piston pin is mounted directly, without no bearing bushing. D. Pistons The pistons are forged from aluminum alloy. Each piston is provided with two compression rings and two oil regulating rings in common grooves. The piston pin is secured against translation by means of elastic retainers. The piston surface is graphite faced. E. Cylinder barrels and heads The cylinder barrels are machined from nitrided steel forgings. On the exterior, there are machined cooling fins. The inside of the barrels is nitrided and underwent a special finish to shorten engine run-in period. The heads, with a great density of cooling fins on the exterior, are aluminum alloy castings. The intake port is on the right side and the exhaust port on the left side. To the heads, with hemispherical combustion chamber, there are shrunk the valve seats made from special steel and the valve guides made from bronze. To the heads there are also screwed in the bronze spark plug inserts. The ports are provided with flanges and studs for air intake piping and exhaust stacks mounting. For camshaft housing mounting, the heads are provided with steel threaded inserts. Each head is provided with one intake and one exhaust valve. The exhaust valve is made from Fig. 2-1 a heat-resistant steel and is internally natrium cooled. To actuate valves, there were provided two helical springs, identical for each valve. The upper spring seats are Typical M 337AK longitudinal section retained by means of tapered keys. The cylinder barrels and heads are mounted together and fastened by means of four studs and nuts. A bronze gasket is placed between the barrel and the head while a thin gasket being placed between cylinder flange and crankcase. 1. 1. 1998 2-3 2-4 1. 1. 1998 DESCRIPTIO N OPERATOR´S MANUAL Fig. 2-1 b Fig. 2-1 c Typical M 337A/AK cross section Typical M 337A/AK cross section 1. 1. 1998 2-5 2-6 1. 1. 1998 DESCRIPTIO N OPERATOR´S MANUAL EXPLANATIONS 1. Crankcase Oil Scavenge Tube 2. Camshaft 3. Camshaft Housings 4. Oil Sump 5. Injection Pump 6. Aux. Oil Scavenge Pump 7. Vertical Shaft 8. Starter 9. Supercharger (M332A,AK; M337A,AK) 10. Exhaust Valve 11. Intake Valve 12. Valve Clearance Adjust Screw 13. Throttle Housing 14. Injection Nozzle 15. Air Scoop 16. M332A, M337A, M132A Oil Strainer 17. Gravity Valve In Camcase M 332AK, M 337AK, M132AK, M137A, M137AZ 18. Crankcase Breather 19. Crankcase Breather 20. Three Way Fitting With High Pressure Vlave 21. Main Oil Pump 22. Oil Outlet 23. Oil Inlet 24. Inlet Gravity Valve in Main Oil Pump- M 337AK, M 332AK, M137A/AZ, M132AK Fig. 2-1 d M 337 AK rear view 1. 1. 1998 2-7 2-8 1. 1. 1998