TM 11-923B Power Units PE-99-B, 1943-12-15 TABLE OF CONTENTS SECTION I — DESCRIPTION General 1 1 Detailed description 2 1 SECTION II — INSTALLATION AND OPERATION Installation 3 7 Preparation for use 4 7 Battery instructions 5 9 Automatic voltage regulator 6 10 SECTION III — FUNCTIONING OF PARTS References 7 11 Automatic choke control 8 11 Impulse coupling 9 12 Voltage regulator 10 12 SECTION IV — MAINTENANCE Lubrication 11 14 Fuel 12 15 To clean the fuel lines 13 15 Carburetor 14 15 Fuel pump 15 18 Automatic choke 16 18 Governor — correct motor speed 17 19 Ignition system 18 21 Electric starter 19 25 Battery charging generator 20 25 To remove and replace flywheel 21 26 Cylinder assembly 22 26 Compression 23 26 Valve adjustment 24 26 Piston 25 27 Connecting rod 26 27 Crankshaft 27 28 Camshaft 28 28 Oil pump 29 28 Carbon 30 28 Air cleaner 31 28 Muffler 32 28 A-C generator 33 29 Automatic regulator maintenance 34 31 Overhauling 35 33 Disassembly and assembly of connecting rod, piston, etc 36 34 Disassembly and assembly of oil pump 37 34 Disassembly and assembly of cylinders 38 35 Disassembly and assembly of camshaft 39 35 Disassembly and assembly of governor 40 36 Disassembly and assembly of crankshaft 41 36 Cylinder firing sequence 42 37 Service chart 43 37 Storage 44 38 Trouble chart — engine 45 39 Trouble chart — generator 46 42 SECTION V — SUPPLEMENTARY DATA Table of replaceable parts 47 47 Standard nuts, bolts, washers, etc 48 107 Names of manufacturers 49 111 LIST OF ILLUSTRATIONS Fig. No. Title Page 1 Power Unit PE-99-B, tool compartment side vi 2 Power Unit PE-99-B, terminal side 2 3 Control panel 4 4 Power Unit PE-99-B, exciter end 6 5 Automatic choke 11 6 Fuel filter 15 7 Carburetor cross section 16 8 Magneto parts 20 9 Magneto timing diagram 24 10 Brush and commutator servicing 30 11 A-C generator voltage regulator " 32 12 Power Unit PE-99-B, engine cross section 43 13 Engine, magneto — side view 44 14 Engine, starter — side view 45 15 Engine, power take-off end 46 16 Fuel pump disassembled 60 17 Fuel filter 62 18 Air cleaner cross section 64 19 Automatic choke disassembled 66 20 Carburetor disassembled 68 21 Low voltage charging generator 72 22 Low voltage regulator 76 23 Starting motor, sectionalized view 78 24 Ignition shielding 80 25 Magneto parts group 82 26 A-C power generator 94 27 A-C generator voltage regulator 98 28 Cable reels and accessories 102 29 Wiring diagram for Power Unit PE-99-B 112, "15 December, 1943.", "Power Unit PE-99-B is a self contained, gasoline-engine driven electrical generator. The unit will furnish ... alternating current"--Page 1, Includes an exhaustive table of replaceable parts