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MTD 31AE5MLG729 - page 1
Ser vice Manual MTD Products LLC - Product T r aining and Education Dep artment FORM NUMBER 769-01418 9/2004 31AE5ML G729 T w o-Stage Snow T hr o wer NOTE: These materials are for use by trained technicians who are experienced in the service and repair of outdoor power equipment of the kind described in this publication, and are not intended fo ...
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TABLE OF CONTENTS General Information ........ ................................................. ................ ............... ............ 1 Tire Pressure ............ .................................................................. ................ ............... 2 Chute Installation ..... ............................................ ...... ...
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1 31AE5MLG729 Y ARD MACHINES SNOW THROWER Model 31AE5MLG729 • Serial Number 1G024B1016 8 • T wo S tage – 4 Cycle HMSK80-1 1 0 – 10.5 HP • 28” Xtreme Auger • 21” Inta ke Height • T ecumseh Engine With Electric S tart • Power Steering • 4 – W ay Discharge Chute Con trol • 6 Forward S peeds and 2 Reverse S peeds • Built in ...
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MTD 31AE5MLG729 - page 6
2 There is a storage area in the handle p anel used fo r holding the spare auger shear pins. See Figure 2. 1. TIRE PRESSURE Before operating, che ck tire pressure. Both tires should be between 15 psi and 20 p si. NOTE: If the tire pres sure is not equal in b oth tires, the unit may pull to one side or th e other during operation. 2. CHUTE INSTALLAT ...
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MTD 31AE5MLG729 - page 7
3 shave plate. Use a middle or lower position when the area to be cleared is uneven, such as a gravel dr iveway . CAUTION: Loose gravel can be picked up and thrown by the auger , causing injury to the opera- tor and bysta nders and/or damag e to the snow thrower and surr ounding property . For initial adjustment we recommend pla cing the shave plat ...
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MTD 31AE5MLG729 - page 8
4 5.4. Loosen the hex jam nut on the auger co ntrol cable "Z" fitting and rot ate the coupling end of the cable d ownward to prov ide more slack or upward to take up slack. See Figure 8. 5.5. Retighten the he x jam nut and repeat all three tests to verify proper a djustment has been achieved. 6. AUGER CONTROL TESTING AND ADJUST- MENT 6.1. ...
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MTD 31AE5MLG729 - page 9
5 When replacing pins, spray an oil lubr icant into shaft before inserting new pins. 7. SHIFT ROD ADJUSTMENT If the full range of speeds ( forward and rever se) cannot be achiev ed, adjust the s hif t rod. 7.1. Place the shif t lever in the fastest forward speed position and remove the hairpi n clip which secures the ferrule to the shift lever . Se ...
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MTD 31AE5MLG729 - page 10
6 8.6. Using a 3/8” so cket, remove the four self-t apping screws which secure the frame cover to the frame. See Figure 15. 8.7. Using a pie ce of starte r cord, unhook the support bracket spring from the frame. See Figure 16. 8.8. Using a 9/16” socke t and a ¾” wrench, loosen and remove the sho ulder screw which acts as a belt keeper . 8.9. ...
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MTD 31AE5MLG729 - page 11
7 10. FRICTION WHEEL REMOV AL If the snow thrower fails to drive with the drive control engaged, and performin g the drive contro l cable adjustment fails to correc t the problem, the friction wheel may need to be replaced. 10.1. Examine the friction wheel for signs of wear or cracking an d replace if necessary . 10.2. Place the shift lever in seco ...
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MTD 31AE5MLG729 - page 12
8 10.9. Holding the friction wheel assembly , slide the hex gear shaft to the right . See Figure 22. NOTE: It may be necessary to use a drift punch on the left side of the shaf t to drive it from the bearing. 10.10. Lif t the chain of f the small sprocket. 10.1 1. Catch the bearin g, sprocket and friction whee l as they come of f the shaft. See F i ...
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MTD 31AE5MLG729 - page 13
9 1 1.2. Using a 3/8” socket, re move the shaft retainer cover . See Figure 25. 1 1.3. Remove the ba ll bearing and flat washer . 1 1.4. Using snap ring pliers, re move the retaining ring. See Figure 26 . 1 1.5. Remove the three flat washer shims. Figure 25 Shaft Ret ainer Cover Figure 26 Retaining Ring 1 1.6. Remove the planet ary ring gear . Se ...
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MTD 31AE5MLG729 - page 14
10 12.3. Remove the right planet ary gear cluster fr om the drive shaft. See Figure 29. 12.4. Slide the drive shaft to the right while holding the left planet ary gear cluster in place. See Figure 30. 12.5. Remove the drive shaf t and sprocket from the unit. 12.6. Remove the drive chain from around th e left planet ary gear cluster and remove th e ...
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MTD 31AE5MLG729 - page 15
11 13.7. Slide the right axle to the right an d remove the gear , shim washer a nd hex flange b earing from the axle as you remo ve it. See Figure 33. 13.8. Slide the lef t axle to the lef t and remove the axle support tube, gear , shim washer and hex flange bearing as you remove it. See F igure 34. Figure 33 Right Axle Axle Support T ube Figure 34 ...
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MTD 31AE5MLG729 - page 16
12 14.5. Use needle nose pliers to r emove the hairpin clip from the clevis pin secu ring the 4-way chute control asse mbly to the chute su pport tube. Remove the clevis pin. See Figure 36. 14.6. Remove the control as se mbly and set it on the engine. 14.7. Using a ½” socket, re move the AB screw secur- ing the lower portion of the chu te suppor ...
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MTD 31AE5MLG729 - page 17
13 14.1 1. Separate the two h alves of the unit. Se e Figure 40. NOTE: As you separate the housing halves, remove the exte nsion spring fro m the auger idler bracket. CAUTION: After the unit is split, place wood blocks at the rear of the wheel drive frame to support it and keep it from tipping back. 15. FRICTION WHEEL DISC DISASSEMBL Y 15.1. Discon ...
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MTD 31AE5MLG729 - page 18
14 NOTE: Duri ng reassembly note that th ere are two mounting holes in the friciton wheel support bracket. The friciton wheel disc must be installed in the left hand hole as you face the friction wheel support bracket. See Figure 44. 16. AUGER PULLEY REMOV AL 16.1. S plit the unit in two. Refer to the SPLITTING THE UNIT Section. 16.2. Wedge a 2x4 b ...
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MTD 31AE5MLG729 - page 19
15 17.4. Using a 1/2 “ socket, remove the four (two on each side) hex screws securin g the auger assembly to the auger housing. See Figure 47 . 17.5. Carefully tip back and remove the hou sing from the auger assembly . See Figure 48. Figure 47 Hex Screws Figure 48 AUGER AND IMPELLER NOTES • The impeller worm shaft is machined to match a double ...
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MTD 31AE5MLG729 - page 20
16 18. REDUCER TRANSMISSION 18.1. The reducer can be serviced. It can also be pur- chased as an assembly . NOTE: On the top of the gearbox is inspection and access hole for adding grease when and if required. Remove the rubber grommet from th e lubrication port. See Fig ure 51. 19. REDUCTION T RANSMISSION DISASSEMBLY 19.1. Using a 3/8” socket, r ...
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MTD 31AE5MLG729 - page 21
17 20.3. Align one of the holes in the impeller with the idler arm nut on th e front of the auge r housing. See Figure 54 . 20.4. Using a 9/16’ socket on a long exte nsion and a 15/16” socket on a ½’ socket wrench, remove the nut and shoulder screw att aching the idle r to the auger housing. See Fi gure 55. 20.5. Inspect the idler pulley for ...
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