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MTD Gear Case Parts for NEWER models  (scroll down for older models)
Reference # in
diagram
Replaces MTD #
Order
 
    684-0158, 984-0158 Impeller
684-0158 Impeller
$93.99
 
684-04057, 68404057A
684-0637, 6840637A
684-04057A-0637
684-04057 Impeller
$74.99
1
    618-0124, 618-0124A     Housing
    LH
    918-0124, 918-0124A    includes
    bushing
    618-0058, 918-0058      and oil
    seal
    719-0320, 919-0320
    719-04292, 919-04292
    618-0418, 918-0418
618-0124 LH Housing === NO STOCK ===
2
    618-0123      Housing RH
    618-0123A    includes bushing
    618-0059      and oil seal
    719-0319
    719-04291
618-0123 RH Housing === NO STOCK ===
3
    710-0642, 910-0642  
    Bolts
710-0642 Housing Bolt
$2.99
5
    714-0161, 914-0161      
    Key
714-0161 Woodruff Key
$6.50
6
    715-0143, 915-0143
    Pin with hollow center
715-0143 Shaft Pin
$4.25
 
    715-04021, 915-04021
    Pin with hard center
715-04021 Pin
$4.50
7
    717-04449, 917-04449
    717-0528, 717-0528A
    917-0528, 917-0528A
    717-04861, 917-04861
    Brass Worm Gear
717-0528A Worm Gear MTD
$44.99
8
    717-0526, 917-0526
    Worm Shaft with splined end
717-0526 Splined end Worm Shaft
$99.99
 
    717-04126, 917-04126   
    Worm Shaft with flat end
917-04126 Flat end Worm Shaft
$59.99
 
    717-3320, 917-3320
    Worm Shaft for Tractor
    Mounted Snowblowers
717-3320 Worm Shaft
$95.99
9
    718-04071    
    Thrust Collar
         OD: 1 1/2"  ID: 3/4"
Height: 5/8"
718-04071 Thrust Collar
$12.99
 
    718-0186     
    Thrust Collar
     OD: 1 1/2"  
          ID: 3/4"  Height: 7/16"
718-0186 Thrust Collar
$12.50
10
    721-0325      Plug
721-0325 Housing Plug
$3.99
11
    721-0327      Oil Seal
721-0327 Oil Seal
$6.99
12
    736-0351      Washer
736-0351 Washer
$2.99
13
    736-0369      Washer
736-0369 Washer
$4.99
14
    736-0445      Washer
736-0445 Washer
$2.99
 
    736-3084      Washer
736-3084 Washer
$4.99
15
    741-0662      Bushing
    Width: 0.50"
         Inner Dimension: 0.75"
Outer Dimension: 1.00"
741-0662 Bushing
$8.99
16
    741-0663      Bushing
    Width: .925"
         Inner Dimension: .50"
Outer Dimension: .75"
741-0663 Bushing
$9.99
17
    741-0661      Bushing
741-0661 Bushing ===NLA===
18
    721-0179, 921-0338      Oil Seal
721-0338 Oil Seal
$5.99
 
    721-0327      Oil Seal
721-0327 Oil Seal
$6.99
 
    721-0338      Oil Seal
721-0338 Oil Seal
$5.99
837-0168, 727-0111, 727-0149,
737-0122
737-0124, 737-0129 737-0157,
737-0168
737-0168A
Grease
4.5 oz Grease Tube === OUT OF STOCK ===
     

MTD Gear Case Parts for OLDER models  (scroll up for newer models)
Reference # in
diagram
Replaces MTD #
Order
 
715-0249, 915-0249, 489401
Roll Pin
715-0249 Roll Pin
$6.99
35
715-0118 Roll Pin
715-0118 Roll Pin
$3.99
37
717-0297   Left Case Half
753-0889

(now comes as a kit, both halves)
753-0889 Gear Box Housing Kit === NLA ===
46
741-0192   bushing
741-0170 / 741-0192 Bushing MTD
$7.99
50
710-0891   shear bolt
710-0891 Shear Bolt
51
721-0146   oil seal
721-0146 Oil Seal MTD
$12.99
53
741-0182   bushing
Bushing 741-0182 (NLA)
54
736-0266   washer
736-0266 Washer
$8.99
55
717-0300  Aluminium worm gear
971-0300
717-1425
917-1425
717-0300 Worm Gear MTD === OUT OF STOCK ===
  717-1425 Brass worm gear
917-1425
717-1425 Brass Gear
$79.99
56
741-0184   thrust bearing
741-0184 Needle Bearing MTD
$9.99
57
736-0291   washer
736-0291 Washer
$6.99
58
717-0299   worm gear
917-0299 Worm Gear MTD
$55.99
59
741-0217   bushing
741-0217 Bushing MTD
$8.99
60
717-0298   Right Hand Case Half

(now comes as a kit, both halves)
753-0889 Gear Box Housing Kit === NLA ===
61
710-0376   bolt
710-3008
710-3008 Bolt
$3.99
62
721-0144   gasket
721-0144 / 921-0144 Gear Case Gasket MTD
$8.99
63
721-0145   oil seal
721-0145 Oil Seal MTD
$9.99
64
714-0126   woodruff key
714-0126 Woodruff Key
$3.99
65
716-0111 snap ring
716-0111 Snap ring
$4.99
66
714-0135   woodruff key
714-0135 Woodruff Key
$3.50
77
736-0291   washer
736-0291 Washer
$6.99
837-0168, 727-0111, 727-0149,
737-0122
737-0124, 737-0129 737-0157,
737-0168
737-0168A
Grease
4.5 oz Grease Tube === OUT OF STOCK ===
 
 
  
918-04190, 918-04190A,
918-04190B, 618-04170,
618-04170A
22" Gearbox
  
618-04294, 618-04294A,
618-04294B
918-04294, 918-04294A,
918-04294B
Gearbox Assembly