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7                                                                                                                        MI-1058 

GENERAL DESIGN 

Wisconsin

  engines  are of the 

four cycle type

, in which 

each of the four operations of 

suction, compression, 

expansion

  and 

exhaust

  constitutes a complete stroke.  

This gives one power stroke for each two revolutions of 

the crankshaft. 
 

COMPRESSION RELEASE 

A component part of the camshaft that operates auto-

matically and trouble free.  Permits fast and effortless 

starting with no dangerous “kick back”. 

COOLING 

Cooling is accomplished from a flow of air circulated 

over the cylinder and head of the engine, by a combi-

nation fan-flywheel encased in a sheet metal shroud.  

The  air is divided and directed by ducts and baffle 

plates to insure uniform cooling of all parts. 

Never operate an engine with any part of the 

shrouding removed, because this will retard the 

air cooling. 
Keep the cylinder and head fins free from dirt 

and chaff.  Improper circulation of cooling air will 

cause engine to overheat. 

CARBURETOR 

The proper combustible mixture of gasoline and air is 

furnished by a balanced carburetor, giving correct  fuel 

to air ratios for all speeds and loads. 

IGNITION 

The spark for ignition of the fuel mixture is furnish-

ed by a high tension 

flywheel magneto

. A stator plate 

functions as an engine bearing plate as well as a sup-

port for the coil and core.  The permanent magnet is an 

integral part of the flywheel, and a breaker box on the 

side of the crankcase contains the points, condenser 

and  stop switch.  A push pin, actuated by the engine 

camshaft, operates the 

breaker arm at half engine speed

Battery ignition

 

(12 volt) can be furnished in place of 

magneto, when specified.  An ignition coil and breaker 

assembly are the means of inducing high voltage to 

the  spark plug

.  Battery is not

  furnished by Wisconsin 

Motor Corporation. 

LUBRICATION SYSTEM 

An oil dipper on the connecting rod provides for a 

splash type lubrication system.  The action of the dip-

per striking the oil in the crankcase provides ample lub-

rication for all 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 

variable speed controls are available for practically 

all applications. 

ROTATION 

The rotation of the crankshaft is 

clockwise

  when 

viewing the flywheel or starting end of the engine.  

This gives 

counter-clockwise

  rotation at the power 

take-off end of the crankshaft.  

Horsepower

  given in the accompanying chart is for an 

atmospheric temperature of 60° Fahrenheit at sea 

level  and at a Barometric  pressure of 29.92 inches of 

mercury.  

HORSEPOWER 

 

 
 
 
 
 
 
 
 
 

For each inch lower  the  Barometric pressure drops, 

there will be a loss in horsepower of 3

½

%. 

For each 10° temperature rise there will be a reduce-

tion in horsepower of 1%. 
For each 1000 ft. altitude above sea level there will 

be a reduction in horsepower of 3

½

%.  

The friction in new engines cannot be reduced to the 

ultimate minimum during the regular block test, but 

engines are guaranteed to develop at least 85 per 

cent  of  maximum power when shipped from the fac-

tory.  The power will increase as friction is reduced 

during the first few days of operation.  The engine will 

develop at least 95% of maximum horsepower when 

friction is reduced to a minimum. 

 

INSTRUCTIONS FOR 

STARTING AND OPERATING 

LUBRICATION 

Before starting a new engine, fill crankcase base with 

the correct grade of engine oil, as specified in “

grade 

of  oil chart

”.  Fill thru the dipstick plug opening illus-

trated in 

Fig. 4

, with 

1 quart

 of oil.  

For 

run-in of new engines

, use same oil as recom-

mended in Grade Of Oil Chart. 
The oil level mark is indicated by a groove on the dip 

stick as shown in 

Fig 4

.  Check oil level by resting 

the bottom of plug at the top of oil filler opening on 

gear cover.  (Do not thread in place to check level). 
Too much emphasis cannot be given to the matter of 

oil  selection.  High grade oil of the body suited to the 

requirements of your engine is the most important sin-

gle item in the economical operation of the unit, yet 

R.P.M 

MODEL TRA-10D 

 

 

2000 

5.4 

2200 

6.1 

2400 

6.8 

 
 

2600 

7.6 

2800 

8.3 

3000 

8.8 

3200 

9.4 

 

3400 

9.8 

 

3600 

10.1 

 
 

 

 

 

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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