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MI-1067                                                                                                   16                                                                                                

Spark plug wet or dirty. 
Spark plug point gap wrong

.  See Page 14. 

Condensation on spark plug electrodes. 
Breaker points pitted or fused. 
Breaker arm sticking. 
Condenser leaking or grounded. 
Oil in breaker box

.  See ‘Crankcase Breather’, Page 10. 

Spark timing wrong

.  See ‘Timing’, Page 11. 

ENGINE MISSES 

Spark plug gap incorrect.  

See Page 14. 

Worn and leaking ignition cable. 
Weak spark.  

See ‘Ignition Spark’, Page 10. 

Loose connections at ignition wires. 
Breaker points pitted or worn. 
Oil in breaker box

.  See ‘Crankcase Breather’, Page 10. 

Water in gasoline. 
Poor compression.  

See ‘Compression’, Page 15. 

ENGINE SURGES OR GALLOPS 

Carburetor flooding. 
Governor spring hooked into wrong hole in lever, or 

governor rod incorrectly adjusted.  

See ‘Governor Ad-

justment’, Page 24. 

ENGINE STOPS 

Fuel tank empty, or water, dirt or gum in gasoline. 
Gasoline vaporized in fuel lines due to excessive 

heat around engine (Vapor Lock)

 

See ‘Stopping En-

gine’, Page 9.  

Vapor lock in fuel lines or carburetor due to using 

winter gas (too volatile) in hot weather. 
Air vent hole in fuel tank cap plugged.  Engine scored 

or stuck due to lack of oil. 
Ignition troubles

.

  

See ‘Ignition’, Page 15. 

ENGINE OVERHEATS 

Crankcase oil supply low.  Replenish immediately. 
Ignition spark timed wrong.  

See ‘Timing’, Page 11.

 

Low grade of gasoline, or engine overloaded. 
Restricted cooling air circulation. 
Part of air shroud removed from engine. 
Dirt between cooling fins on cylinder head. 
Engine operated in confined space where cooling air 

is continually recirculated. 
Dirty or incorrect grade of crankcase oil. 
Restricted exhaust, or carbon in engine. 
Engine operated while detonating due to low octane 

gasoline or heavy load at low speed. 

ENGINE KNOCKS 

Poor grade of gasoline or of low octane rating. 
Engine operating under heavy load at low speed. 
Carbon or lead deposits in cylinder head. 
Spark advanced too far.

 

 

See ‘Timing’, Page 11. 

Loose or burnt out connecting rod bearing. 
Engine overheated due to causes under previous 

heading. 
Worn or loose piston pin. 

ENGINE BACKFIRES THROUGH CARBURETOR

 

Water or dirt in gasoline, or poor grade of gasoline. 
Sticky inlet valves.  

See ‘Valves and Seat Insert’, 

Page 18. 

Overheated valves, or hot carbon particles in engine. 
Engine cold. 
 

DISSASSEMBLY AND REASSEMBLY 

OF ENGINE

 

Engine repairs should be made by a mechanic who 

has experience in such work.  When disassembling 

the engine it is advisable to have several boxes avail-

able so that parts belonging to certain groups can be 

kept together.  Capscrews of various lengths are used 

in the engine, therefore great care must be exercised 

in reassembly so that right screws will be used in 

the proper places. 
Tighten the capscrews of the cylinder head, gear 

cover, connecting rod, stator plate and the spark plug 

to the specified torque readings indicated in the para-

graphs of reassembly, relative to these parts. 
With the disassembling operations, instructions on 

reassembling are also given, as often it will not be 

necessary to disassemble the entire engine.  If it is 

desired to disassemble  the entire engine, the re-

assembly instructions can be looked up later under 

the headings of the various parts.   
While the engine is partly or fully dismantled, all of 

the parts should be thoroughly cleaned

.  

Use all new 

gaskets

  in reassembly and lubricate all bearing 

surfaces. 

TESTING REBUILT ENGINE 

An engine that has been completely overhauled; such 

as having the cylinder rebored and fitted with new 

piston, rings and valves, should go through a thorough 

“run-in” period before any load is applied to it. 
The engine should be started and allowed to run for 

about one-half hour, at about 1600 to 1800 R.P.M. 

without load.  The R.P.M. should then be increased 

to engine operating speed, still without load, for an 

additional three and one-half to four hours. 
The proper “running-in” of the engine will help  to 

establish polished bearing surfaces and proper clear-  

Summary of Contents for Air Cooled TR-10D

Page 1: ...WISCONSIN HEAVY DUTY ENGINES INSTRUCTION BOOK AND PARTS LIST MODELS TRA 10D TR 10D ISSUE MM 320 C WORLD S LARGEST BUILDERS OF HEAVY DUTY AIR COOLED ENGINES...

Page 2: ...gine operating speed still without load for an additional two hours If at all possible operate the engine at light loads for a period totaling about eight hours before maximum load is applied This wil...

Page 3: ...UCTIONS WISCONSIN SINGLE CYLNDER ENGINES MODEL TRA 10D 3 1 8 Bore 2 7 8 Stroke 22 05 cu In Displacement MODEL TR 10D 3 1 8 Bore 2 5 8 Stroke 20 2 cu In Displacement WISCONSIN MOTOR CORPORATION Milwauk...

Page 4: ...l hours All adjustments are carefully made so that each engine will be in perfect operating condition when it leaves the factory Back of the Wisconsin Motor Corporation are more than fifty years of en...

Page 5: ...ed 24 Electrical Equipment Wiring Circuits and Motor Generator 13 Fuel 8 Fuel Pump 8 General Design 7 Governor Adjustment 24 PAGE Governor Description 7 Governor Operation 23 Horsepower 7 Ignition Des...

Page 6: ...MI 937 2 4 Fig 1 289860C TAKE OFF rear and LEFT HAND SIDE VIEW of ENGINE...

Page 7: ...5 MI 938 2 FAN END front and RIGHT HAND SIDE VIEW of ENGINE...

Page 8: ...MI 939 2 6 SECTIONAL VIEWS OF ENGINE...

Page 9: ...internal parts of the engine GOVERNOR A governor of the centrifugal flyball type controls the engine speed by varying the throttle opening to suit the load imposed upon the engine Manually operated va...

Page 10: ...temperatures and excessive idling FUEL The fuel tank should be filled with a good quality gasoline free from dirt and water The capacity of the tank is one gallon Some of the poorer grades of gaso li...

Page 11: ...hich 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 normally be required but it must be remembere...

Page 12: ...lement After five washings or one year of service replace cartridge New cartridges are available at you Wis consin Motor dealer Refer to parts list section for re placement part number CRANKCASE BREAT...

Page 13: ...pyramiding and it becomes necessary to resurface or replace point it will also be necessary to readjust the gap to its proper clearance and re time the engine The normal breaker point gap is 0 020 inc...

Page 14: ...clockwise and stop immediately when light goes out At this point mark on flywheel should line up with pointer in shroud 7 Assemble coil primary wire to terminal stud and mount cover MAGNETO SERVICE I...

Page 15: ...an ignition coil are wired in accordance with Fig 14 This type ignition system has always been wired negative ground Battery is not furnished by Wisconsin Motor Corporation MOTOR GENERATOR OPERATING I...

Page 16: ...and pour about a fluid ounce of crankcase oil through the spark plug hole Turn the engine over several times with the rope starter to distribute the oil over the cylinder wall Then replace the spark...

Page 17: ...ding float needle valve in carburetor open This condition would be indicated if fuel con tinues to drip from carburetor with engine standing idle Often tapping the float chamber of the carbu retor ver...

Page 18: ...anced too far See Timing Page 11 Loose or burnt out connecting rod bearing Engine overheated due to causes under previous heading Worn or loose piston pin ENGINE BACKFIRES THROUGH CARBURETOR Water or...

Page 19: ...wo capscrews holding shroud to bottom of crankcase and two screws at the cylinder head CARBURETOR and AIR CLEANER Fig 21 The carburetor and air cleaner should be removed both to facilitate working on...

Page 20: ...an be removed when replacement becomes necessary by means of Wisconsin Motor DF 66 A insert puller See Fig 23 Grinding of valves and seats should be done by an authorized Wisconsin service station See...

Page 21: ...n stroke Observe position of valve stems in the inspection compartment Both valves should be in their lowest position closed then proceed to check clearance FLYWHEEL Fig s 27 and 28 Place a 1 1 2 box...

Page 22: ...into grease filled hole and assemble gear cover by tapping in place with a soft hammer Caution Be sure timing marks on crankshaft and camshaft gear Fig 38 remain correctly mated when end of camshaft...

Page 23: ...on down until rod con tacts crank pin The oil dipper in Model TRA 10D is an integral part of the connecting rod cap whereas the Model TR 10D has a sheet metal dipper that must be mounted so that the c...

Page 24: ...clearance of 002 to 006 in the guide hole Timing mark on camshaft gear must be located between the two marked teeth on the crankshaft gear See Fig 38 If valve timing is off engine will not function pr...

Page 25: ...crankshaft gear cover and flywheel are mounted The end play should be 001 to 004 inch with engine cold and can be determined as illustrated in Fig 43 Wedge a lever between the fly wheel and crankcase...

Page 26: ...g tension by means of an adjusting screw The governor lever has 8 holes for the governor spring with the No 1 hole closest to the fulcrum shaft A change in the design of the governor flyweights was in...

Page 27: ...selected by the WISCONSIN MOTOR CORPORATION in order to assure complete and efficient repair and inspection service to owners of Wisconsin Air Cooled Engines These service stations equipped and traine...

Page 28: ......

Page 29: ...PARTS FOR ENGINE MODELS TRA 10D AND TR 10D...

Page 30: ...PARTS FOR ENGINE MODELS TRA 10D AND TR 10D...

Page 31: ...PARTS FOR ENGINE MODELS TRA 10D AND TR 10D...

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Page 41: ...agm section 7 Using a screw driver inserted into the coils of rocker arm spring 13 remove this spring and save 8 Holding the mounting bracket 11 in the left hand with the rocker arm toward the body an...

Page 42: ...of this pas sage The fuel travels through this channel to the idle jet cali bration The air for the idle mixture originates back of or from behind the main venturi The position of the idle adjusting...

Page 43: ...alve opens automati cally when the engine starts and admits air to avoid over choking or flooding of the engine The mixture required for starting is considerably richer than that needed to develop pow...

Page 44: ......

Page 45: ...ns have been made unless authorized by us We make no Warranty in respect to trade accessories such being subject to the Warranties of their respective manufacturers We shall in no event be liable for...

Page 46: ...WISCONSIN MOTOR CORPORATION MILWAUKEE WISCONSIN 532466 PRINTED IN U S A...

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