Wisconsin vg4d Repair Manual Download Page 15 | Manualshive

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Summary of Contents for vg4d

Page 1: ...WISCONSIN MODEL VG4D 20RP...

Page 2: ...t enginelife Wis Con Total Power Corp distributors anddealers because of their closefactory relations canrenderthe bestandmostefficient service THE LIFE OF YOURENGINEDEPENDS ONTHE CAREIT RECEIVES The...

Page 3: ...t to establlishthepolished bearing surfaces which aresonecessary to the properperformance andlonglife of anengine These canonly beobtained by runninga newenginecarefully andunderreduced loadsfor a sho...

Page 4: ...Operations that mayresult only in enginedamage are identified in the RepairManual by this symbol CAUTION Wis Con Total Power Corp cannotanticipate everypossiblecircumstance that mightinvolve a potent...

Page 5: ...ntto thesesub systems WARNING Read andobserve all individual safety warnings as youusethis manual to operate serviceor repair yourengine Alwaysexercisecaution whenever workingwith an engineor anyassoc...

Page 6: ...t speeds in excess of 2400 R P M load Donot operate engine in a closedbuildingunless theexhaust is pipedoutside Thisexhaust contains carbonmonoxide a poisonous odorless and invisible gas which if brea...

Page 7: ...uel Pump and Priming 8 Fuel Pump Service 30 Gasoline Strainer 11 General Information andDesign 7 Governor Adjustment 24 Hot Weather Operation 16 Horsepower 7 Ignition Switch 8 Ignition System 7 Illust...

Page 8: ...DISTRIBUTOR FLYWHEEL SHROUD IGNITION COIL OIL DRAIN PLUG OPEN ENGINE TAKE OFF VIEW AIR VENT HOLE FUEL TANK CAP FUEL TANK MUFFLER OIL FILLER AND BREATHER CAP OIL BATH AIR CLEANER CYLINDER NUMBERS OIL S...

Page 9: ...RING SPLIT SKIRT PISTON SPLllrTO WARD O RECT ON OFCRANKSHAFT ROTATEON CAM GROUND PISTON W DE THRUST FACE OPPOS ITE CRANKSHAFT ROTATION OIL SABER CWL FILTER OIL SLINGER OIL PUMP OIL STRAINER O L SPRAYN...

Page 10: ...D LOW MARKS ON OIL GAUGE SABER CRANKSHAFT OIL SLINGER TO OIL FILTER OIL PRESSURE RELIEF VALVE SET FOR 15 POUNDS PRESSURE OIL STRAINER SCREEN WITH ENGINE AT OPERATING TEMPERATURE OIL PRESSURE IN HEADER...

Page 11: ...fixed speed governor a variable speed control to regulate the governed speed of the engine or an idle control ROTATION The rotation of the crankshaft is clockwise when viewing the flywheel or cranking...

Page 12: ...d be filled with a good quality gasoline free from dirt and water The capacity of the tank is approximately 9 gallons Some of the poorer grades of gasoline contain gum which will deposit on valve stem...

Page 13: ...only overstrain all working parts but which might cause wrecking of the engine and possible injury to bystanders All parts of the engine are designed to safely with stand any speeds which might normal...

Page 14: ...t cylinders pistons rings and bearings in a few days time andresult in costly repairs Oncea year or oftener in very dusty conditions the air cleaner should be removed from the engine and the element w...

Page 15: ...cover on the magneto The crankshaft should then be rotat ed with the starting crank this also rotates the mag neto until the breaker points are wide open The opening or gap should then be measured wi...

Page 16: ...remove the spark plug from No 1 cylinder and turn the engine over slowly by the starting crank at the same time holding a finger over the spark plug hole so that the compression stroke can be deter m...

Page 17: ...eginning with engine serial No 3979526the standard wiring circuits for all 12 volt electrical equipment is negative groundpolarity in place of the previously furnished positive ground All 6 volt syste...

Page 18: ...e Fig 15 NEON LAMP TIMING The engine should be timed to the 23 advancedposi tion at not less than 2000 R P M Check timing with a neon lamp connected in series with No 1 spark plug Chalk or paint the e...

Page 19: ...ne or one which has been out of opera tion for some time oil mayhave drained off the cylin SET GAP ders so that compression will be weak causing diffi culty in starting To remedy this condition remove...

Page 20: ...old weather and poor vaporization of fuel and irregular operation of the engine will result with loss of power If the hot spot is too large the inlet manifold and carburetor will be too hot in summer...

Page 21: ...ould of course be left open during this procedure The plugs should then be replaced and starting tried again To test for clogged fuel line loosen fuel line nut at carburetor slightly If line is open f...

Page 22: ...y inlet valves See Valves Page 22 Overheated valves Spark plugs too hot See Spark Plug Page 15 Hot carbon particles in engine DISASSEMBLY ANDREASSEMBLY OF VG4DENGINE Engine repairs should be made only...

Page 23: ...time strike the end of the crankshaft with ababbitt hammer see Fig 19 Theflywheelwill slide off the taper of the crankshaft Donot use a hard hammer as it mayruin the crankshaft and bearings Whenreasse...

Page 24: ...orque After complete assembly and engine is run in re torque headscrews GEAR COVER Disconnectthe governor linkage and removethe governor assembly Remove gear cover screws and drive out the two dowelpi...

Page 25: ...hand tap front of pumphousing not shaft with ham mer and brass rod Fig 28 PIPE PLlU CLEN HEAD OIL Fig 29 PISTONS and CONNECTING RODS Figs 30 31 34 By means of a 9 16 socket wrench loosen and re move t...

Page 26: ...Fig 32 UPPER ENDOF PISTON COMPRESSION RINGS iii SCRAPER RING OIL RING Fig 33 piston Oil the pistons rings wrist pins rod bearings and cylinder walls before assembly CAUTION Identical numbers are stam...

Page 27: ...ach valveso thatthey can be put back into the same guidesthey were re movedfrom Replace valves thatareburned or pitted The exhaust valves are furnished with positive type rotators The valve rotates sl...

Page 28: ...t the flanged sliding sleeve moving it back and forth as the flyweights move in or out The motion of the sleeve is transmitted through a ball thrust bearing to the governor lever which in turn is con...

Page 29: ...ch housing There are three points on these clutches re quiring lubrication and these are filled with grease at the factory see t ig 40 Greasegun fittings are fur nished for periodic lubrication The ho...

Page 30: ...raph for adjustment of the clutch in the Twin Disc and Rockford clutch reduction units A new clutch generally requires several adjustments until the friction surfaces are worn in INSTRUCTIONS FORPROTE...

Page 31: ...he engine and scrubbing off all sediment which may have collected there Whenreplacing the bottom cover a new gasket should be used Be sure to fill the crankcasewith a goodquality of crankcaseoil to th...

Page 32: ...MAGNETO SOLID STATEIGNITION DISTRIBUTORS Majorrepairsof Alternator automotive type Ignition Distributor Magneto andStarting Motormayrequire special tools andtesting equipment It is suggested that thes...

Page 33: ...ting bracket 15 in the left hand with the rocker arm toward your body and the thumb nail on the end of link 10 With the heel of right hand on dia phragm 1 compress the diaphragm spring 11 and the same...

Page 34: ...istinguished from each other by the ammetercalibrations 0 to 15 ampsfor the 10 ampcircuit and 0 to 30 ampsfor the 25 amp circuit or by the wire from ammeter to stator regulator connector 16 gage red w...

Page 35: ...are with the engine running and substitut ing known good components in place of suspected faulty components Static Tests 5 0 thru 7 2 following the run ning tests are more conclusive but sometest req...

Page 36: ...ce for grounding purposes Checkfor continuity with a VOM R x 1 scale or test light FLYWHEEL ALTERNATORCOMPONENTS STATIC TESTS The following test equipment is required DF 83 Analyzer Wisconsin Part Fig...

Page 37: ...s are not as indicated replace module TEST VOM RED VOM BLACK METER NO LEAD TO LEAD TO INDICATION 1 Module Either Module NoContinuity White Lead Black Lead 2 Module Other Module NoContinuity White Lead...

Page 38: ...rical systemper Fig 47 IMPORTANT This is a Negative Groundsystem Charging compo nents will be damaged if groundedwrongin connectingor jumpingbatteries Cbaution Handlebattery carefully to prevent acid...

Page 39: ...ing systemis properly wired 2 Thatall connectionsare clean and tight 3 Thatthe battery is in goodcondition Thetesting shouldbegin by testing the A C voltage output of the stator wherethe 2 leads attac...

Page 40: ...o the air stream to form the idling mixture through two holes one of which is controlled by the idle adjusting needle Turning the adjusting needle counter clockwise out permits more of the emulsion to...

Page 41: ...s in BendixMetalclene or Speedclene and rinsein cleaning solvent Blowout all pas sagesin throttle bodyand fuelbowlwithreduced air pres sure Be sure all carbondepositshave been removedfrom throttle bor...

Page 42: ...woclamp screws Toreplace the contacts removethe breaker fing clampscrew 39 Ref No 48 the breakerarmlock andwasher Ref No 14 and Ref No 18 then lift the breakerarmfromits pivot Remove the spacing washe...

Page 43: ...eplaced with a new factory impregnated wick Other than this the magneto does not require field lubrication No attempt should be made to oil or grease the magneto bearings The magneto lubricant should...

Page 44: ...hthe ignition switchin the on positionthe light shouldlight NOTE If there is novoltagepresentat the positive side of the coil recheckthe circuit fromthe battery through the ignition switchto the coil...

Page 45: ...akm arm pivot 8 INSPECT COOLINGS STEM Remove shrouding and scrape off dirt from between fins around cylinders and from shrouding 9 INSPECT STARTINGMOTOR Check for loose mounting and cable connections...

Page 46: ...ter d 3409Democrat Road Phone 901 365 3600 H EADQUARTERS P O Box181160 Memphis Tennessee 38181 TELEX 462 1058 ITT FAX NO 901 369 4050 EUR PEAN RueJoseph Deflandre 13 B 4053 Chaudfontaine Liege Belgium...

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