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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
 
684-04057, 68404057A
684-0637, 6840637A
684-04057A-0637
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
2
    618-0123      Housing RH
    618-0123A    includes bushing
    618-0059      and oil seal
    719-0319
    719-04291
3
    710-0642, 910-0642  
    Bolts
5
    714-0161, 914-0161      
    Key
6
    715-0143, 915-0143
    Pin with hollow center
 
    715-04021, 915-04021
    Pin with hard center
7
    717-04449, 917-04449
    717-0528, 717-0528A
    917-0528, 917-0528A
    717-04861, 917-04861
    Brass Worm Gear
8
    717-0526, 917-0526
    Worm Shaft with splined end
 
    717-04126, 917-04126   
    Worm Shaft with flat end
 
    717-3320, 917-3320
    Worm Shaft for Tractor
    Mounted Snowblowers
9
    718-04071    
    Thrust Collar
         OD: 1 1/2"  ID: 3/4"
Height: 5/8"
 
    718-0186     
    Thrust Collar
    OD: 1 1/2"  
          ID: 3/4"  Height: 7/16"