MTD 643 User Manual
Page 21
21
Models 643 & 663
Ref.
No.
Part No.
Part Description
1.
712-0116
Lock Jam Nut 3/8-24
2.
756-0178
Flat Idler
3.
784-5632B
Auger Idler Arm
4.
710-0459A
Hex Cap Screw 3/8-24 x 1.50
5.
738-0281
Shoulder Screw
6.
736-0167
Wave Washer
7.
732-0611
Extension Spring
8.
712-3068
Hex Nut 5/16-18
9.
710-0276
Carriage Bolt, 5/16-18 x 1.00
10.
736-0119
Lock Washer 5/16
11.
05931A
Bearing Housing
12.
741-0309
Ball Bearing
13.
710-0451
Carriage Bolt, 5/16-18 x .75
14.
705-5226
Chute Reinforcement
15.
684-0041D
28” Housing Ass’y
16.
712-3010
Hex Nut 5/16-18
17.
712-0429
Lock Nut 5/16-18
18.
736-0242
Belleville Washer
19.
736-0231
Flat Wshr, .344ID x 1.125 OD
24.
784-5618
Bearing Housing
26.
710-0604A
Hex Screw 5/16-18
27.
736-0169
Lock Washer 3/8
28.
712-0798
Hex Nut 3/8-16
29.
741-0245
Hex Flange Bearing
30.
784-5580
Slide Shoe
784-5038B
Skid Shoe (If Equipped)
31.
736-0242
Bell Washer
32.
712-3010
Hex Nut 5/16-18
33.
784-5582A
Shave Plate
34.
710-0260
Carriage Bolt 5/16-18 x .62
35.
684-0065
Impeller Assembly
36.
715-0114
Pin
37.
618-0122A
28” Gear Ass’y
38.
605-5196A
28” Spiral RH
39.
736-0188
Flat Washer
40.
741-0493A
Flange Bushing
41.
605-5197A
28” Spiral LH
42.
710-0890A
Shear Bolt 5/16-18 x 1.5
43.
714-0104
Hairpin Clip
44.
736-0185
Flat Washer
47.
705-5204A
Chute Crank
48.
720-0201A
Chute Crank Knob
49.
726-0100
Push Cap
50.
712-3068
Hex Nut 5/16-18
51.
731-2643
Clean-Out Tool
52.
731-2635
Clean-Out Tool Mount
777I20711
Label: Handle Panel (L)
777I20722
Label: Handle Panel (R)
777S30514
Label: Housing Danger
777S30511
Label: Chute Danger
Ref.
No.
Part No.
Part Description