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Garden 

Tractor 

Talk

Digitally signed by Garden 

Tractor Talk 

DN: cn=Garden Tractor Talk, 

o=GTtalk.com, ou, 

email=contact@gttalk.com, 

c=US 

Date: 2011.10.16 12:05:00 

-04'00'

Summary of Contents for 226

Page 1: ...l No 9 51721 i QUALITY IN THE AIIER ICAN TR ADIT XJ Winneconne Wisconsin 54986 9576 e lngersoll Equipment Co lnc Garden Tractor Talk Digitally signed by Garden Tractor Talk DN cn Garden Tractor Talk o GTtalk com ou email contact gttalk com c US Date 2011 10 16 12 05 00 04 00 ...

Page 2: ... 12 BatteryCareand Maintenance 13 16 BatteryCheckSheet 16 Starter Motor Repair 17 24 For Models 226 re 4r18 ffi 17 tg For Model646 20 24 FlywheelAlternator 25 lgnition 25 25 BreakerPointsService 25 lgnitionTiming Procedure 26 CoilService n CondenserService 21 Spark Plug 29 Printed in U S A 2 9 91 RP 500 165 ...

Page 3: ...SAFETY MESSAGES v 3 ...

Page 4: ... Used for measuring battery charging voltage Ohms RXl00G Used for measuring higher resistance values such as in ignition coil secondary win dings Several suitable meters are Radio Shack Model22 202 and Model 2Z 2O3 LaFayette Model 99R50734 and Model g9R50841 2 An automotive type ampmeter such as lngersoll Part Number C18389 with leads and alligator clips 3 Spark Tester such as Briggs and Stratton ...

Page 5: ...ESS NEUTRAL START SWITCH BAfiERY 9 LIGHT WIRE HARNESS s sil2 FUSE PTO LIGHT SWITCH STARTER LIGHTS COLOR CODE 1 RED 2 BLUE 3 BLACK WHITE 4 YELLOW 5 ORANGE 6 BROWN 7 GREEN 8 BLACK YELLOW 9 WHITE 10 LIGHT GREEN 11 BLACK SOLENOID d t IGNITION SWITCH I WIRE HARNESS BATTERY WIRE HARNESS BREAKER CONTACTS AND CONDENSER r IGNITION cotL FIGURE 1 NEU R L2 2 START r i iviiiin 11 VY STATOR Y RECTIFIER 5 ...

Page 6: ...BLACK 5 YELLOW 6 DARK BLUE 7 WHITE 8 BLUE 26 46 448 TRACTOR WIRING DIAGRAM 226 _ PtN TO 14094020 446 _ PtN 9742W 3 TO 14096200 It48 _ PtN TO 14097625 NOTE Wire from L terminal on switch to lights can be pink WIRE HARNESS SPARK PLUG BREAKER CONTACTS IGNITION corL FIGURE 1A 6 SOLENOID STARTER e 1 LIGHTS ...

Page 7: ...OID STARTER ALTERNATOR STATOR HEADLIGHTS 1 t ICONDENSOR i r I t BREAKER POINTS SPARK Fiih PLUG IGNITION corL WIRE HARNESS WIRING COLOR CODE 1 Red 2 Orange 3 Black 4 Yellow 5 Black 6 Black 7 Pink 8 Black White 9 Black 10 Red 11 White FIGURE 2 NOTE To prevent battery drain while engine is stopped remove red charging lead frorn ammeter terminal and connect to key switch 1 terminal BATTERY 12 VOLT V 7...

Page 8: ...H TERiilt aLs CONNECTOR WIRE HARNESS UTRAL START SWITCH t SOLENOID AND STARTER 2 CONDENSOR BREAKER POINTS COLOR CODE Red Black Yellow Red white Blue White Brown Black white Pink BATTERY 12 VOLT OIL PRESSURE swrrcH I R HEADLIGHTS NOTE lnstall C23744 neutral start switch kit for 646 loaders prior to PIN 9732190 FIGURE 3 RECTIFIER REGULATOR WIRE HARNESS SPARK IGNITION PLUG t 1 8 ...

Page 9: ...Orange 4 Blue 5 Yellow 6 White 7 Black 8 Brown 9 Dark Blue IGNITION SWlTCH IGNITIOTi SIYITCH TERMIiIALS AMMETER ac v L SOLENOI D STATO R STARTE R l ig 3 7 HOUR METEB WIFI E H ARN ESS NEUTRAL START SWITCHES BREAKE R PO I NTS P RESSU R E SWITCH h FIGURE 4 BATTE RY 9 ...

Page 10: ...m batterY positive to solenoid small terminal or from B to S ter minal on switch Replace ignition switch C Solenoid click but engine won t crank See A above 1 Engine tight Attempt to turn engine man ually to check for free rotation Repair engine if found to be tight 2 Defective solenoid switch Connect heavy jumper wire across large solenoid posts Engine should crank Replace solenoid 3 Defective or...

Page 11: ...place lead or plug as required 4 Defective ignition coil Use coil tester Replace 5 Shorted to ground conden ser Unhook condenser lead Crank engine lf weak spark is now seen condenser was shorted Replace condenser A Engine runs at idle and erratically electrical pro blems only Flashing blue arc at points Points bu rned Faulty condenser or condenser connected to coil points and condenser should be c...

Page 12: ...y replace if necessary vll AccEssoRtEs A Oil pressure light does not glow when key is turned on 646 648 only 1 Open sender switch l Remove wire from sender touch to ground Light should glow when key is on l lf light glows replace sen der 2 Open wire or connections 2 Check continuity 2 Tighten connections replace broken wires 3 Bulb burned out 3 Check continuity 3 Replace bulb B Hour meter does not...

Page 13: ...n the Battery Mainten manual BATTERY CARE AND MAINTENANCE REMOVAL AND INSTALLATION Proper removal and installation procedures are required to prevent personal injury and damage to battery or equipment 1 Place all electrical switches in the off position 2 To remove battery DISCONNECT NEGATIVE 1 cable first and POSITIVE cable last 3 To install battery CONNECT POSITIVE cabte f irst and NEGATIVE cable...

Page 14: ...asing freely and no change in specific gravity occurs D Always turn charger off or unplug from wall before removing clips from battery terminals This prevents arcing at battery wlrich can cause explosion of hy drogen gas created while charging BATTERY TESTING SPECIFIC GRAVITY TEST HYDROMETER TEST The hydrometer is used to measure the specific gravity of battery electrolyte weight of electrolyte as...

Page 15: ...e cranking load of room temperature engine is approximately 80 amps Follow the step chart and enter results on the battery check sheet T TAX E TEADING AT EYE TEVET fTOAT MUSI BE FREE FIGURE 7 LOAD TEST CHARGE BATTERY IF NECESSARY UNTI L ALL CELLS ARE AT LEAST 1 200 SPECIFIC GRAVITY IF UNABLE TO OBTAIN SPECIFIC GRAVITY OF 1 200 8oo tN ALL CELLS SPECIFIC GRAVITY OF 1 200 0R MORE 8oo IN ALL CELLS REP...

Page 16: ...e battery Repeat test lf cell readings still vary more than 30 points replace battery Cell No 4 Cell No 5 Cell No 6 2 Most cells below 1 230 and within 30 points 2 Discharged 2 Recharge and make Load Test 3 Most cells at or near f ull charge 1 260 and within 30 points 3 Charged 3 Make Load Test 4 Most cells above f ull charge 1 260 4 Overcharged 4 Check regulatcr NOTE Specif ic gravity readings ap...

Page 17: ...g 9 to keep the brushes in position as the end cap is being in stalled This tool can be made from thin sheet metal ilIio i i HoLDER sPRtNC Nffi PERMANENT MAGNETS COMMUTATOR CAP ASSEMBLY I I INSULATlNG WASHER BRUSH COMMUTATOR SERVICE The starter must be completely disassembled to service brushes and commutator Proceed as fol lows 1 Remove the thru bolts 2 Separate the end cap from armature NOTE Bru...

Page 18: ...ds lf the ohmmeter reading is low it indicates a grounded armature Replace grounded armature TESTING ARMATURE FOR A SHORT CIRCUIT Use a growler for locating shorts in the armature Put armature in growler Hold a thin steel blade e g hacksaw blade parallel to the core and just above it Slowly rotate armature in growler A shorted armature will cause the blade to vibrate and be attracted to the core R...

Page 19: ...ounting surface on both the starter and engine Measure the amount of free travel or lash be tween the pinion gear teeth and the ring gear teeth as shown in Figure 12 The proper lash is 0 020 0 010 0 51 0 25 mm Loosen and adjust the starter motor as necessary to ob tain the correct setting Tighten the starter mounting bolts 4 2 lnstall the starter motor and tighten the mount ing bolts just enough t...

Page 20: ...ar bracket The spacing washers shown in Figure 15 are used for adjustment of the thrust gap of the armature shaft They are between the rear bracket and the commutator NOTE These washers are inserted so the steel washer is located in the commutator side FIGURE I5 Removing Through Bolts 3 Remove the armature from the front bracket Be careful not to miss a small steel washer used in the end of the ar...

Page 21: ...ary Reassembly is the reverse of Disassembly The following precautions should be taken 1 Clean all of the parts carefully with a dry cloth and compressed air IMPORTANT Do not use steam or high pressure water to clean the starter NOTE A Bearing equipped parts must not be immersed in cleaning fluid These parts should be cleaned with a brush dipped in Varsol or any other comparable mineral spirits b ...

Page 22: ...e end play of 004 to 020 mm Tighten the thru bolts to a torque in lbs 4 to 5 Nm TESTING ARMATURE FOR GROUNDS Touch armature shaft or core and the end of each commutator bar with a pair of ohmmeter leads lf the ohmmeter reading is low it indicates a grounded armature Replace grounded armature FIGURE 22 Testing Armature For Grounds TESTING ARMATURE FOR OPEN CIRCUITS The most likely place for an open...

Page 23: ...one lead on the connector and the other on a clean spot on the brushholder lf the ohmmeter reading is high the field coil is open Check the other three brushholders in the same manner may be new WEAR LtMtT 1 3 7 6 mm 13 9 mm FIGURE 26 Testing Field Coils For Opens INSPECTION OF BRUSHES When brushes are worn more than 3 7 6 mm they are to be replaced See that the brushes move smoothly in the brushh...

Page 24: ...en or grounded armature el Grounded or open field coil f Poor electrical connection sl Dirty commutator FIGURE 30 Battery Connections To adjust pinion clearance connect the battery to the starting motor as shown This will allow the pinion of the starting motor to slide and stop ln this state measure the clearance be tween the end of the pinion and pinion stop when the pinion is pushed lightly towa...

Page 25: ...l pass and as a result the engine may not operate at all or if it does run it is likely to misfire particularly at full throttle The breaker point gap affects the time that the contacts are opened and closed lf the points are adjusted to a wider gap they will open earlier and close later A def inite time is required for the magnetic field within the ignition coil to build up to sufficient value lf...

Page 26: ...nnect the timing light in accordance with its manufacturers instructions Use either spark plug because they fire at the same time 7 For units with rear adjust points connect the battery with jumper cables 8 Make sure that nothing can enter the carburetor throat 9 Start and run the engine Change the breaker point gap until the timing marks line up the blower hous see the timing FIGURE 33 Top Adjust...

Page 27: ...ndicates a shorted used primary circuit SPARK TESTER TEST OHMMETER TEST FOR COIL SECONDARY WINDING 1 Connect spark tester ground clip to engine ground 1 Select RX 1 000 scale on ohmmeter 2 connect spark plug wire to test terminal of spark tes 2 Zeroohmmeter needle ter 3 Connect the ohmmeter leads to the coil spark 3 Crank engine plug terminals 4 A sharp blue spark should be visible 4 Resistance sh...

Page 28: ...fer to Figures 36 37 and 38 for examples of failed spark plugs Correct the cause of the failure before returning the engine to service SERVICE Every 50 hours remove plug check condition and reset gap CLEAN AREA around plug before removal DO NOT sandblast wire brush scrape or otherwise service plug in poor condition best results are ob tained with new plug Set spark gap at 025 0 64 mm for standard ...

Page 29: ...Printed in U S A ...

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