Troy-Bilt 609 - Single-Speed Transmission

RER PART
NO. NO.
1 618-0318
2 710-0788
3 711-1274
4 711-1280
5 713-0474
6 713-0478
7 717-1422
8 717-1565
9 717-1569
10 718-0652
11 719-0394
12a 736-0336
12b 736-0337
12c 736-0349
13 736-0519
14 741-0336
15 741-0337
16 750-1238
17 611-0112
611-0133
18 618-0369
618-0424
19 661-0006
20 710-1325
21 710-1206
22 717-0678
23 732-0863
24 741-0862
25 761-0202
26 711-1331
711-1430
27 716-0385
716-0108
28 717-1571
717-1464
29 719-0391A
30 736-0335
736-0723
31 741-0525
32 718-0228
33 711-1431
34 750-1234
35 717-1362
36 717-1363
37 736-0495
38 741-0340
39 721-0338
40 716-0231
Single-speed Transmission
DESCRIPTION
Clutch Collart
Self-tapping Screw, 1/4-20 x 1.0
Drive Shaft
Counter Shaft
22-1ink Chain, #420
144ooth Sprocket
Sprocket Bevel Gear, 42/10
29-tooth Spur Gear
20-tooth Spur Gear
Counter Shaft Coupling
Lower Housing
Flat Washer, 5/8 x 1.0 x .030"
Flat Washer, 5/8 x 1.0 x .040"
Flat Washer, 5/8 x 1.0 x .020"
Flat Washer, .70 x 1.125 x .031
Flange Bearing, 5/8 x 3/4 x 3/4
Flange Bearing, 5/8 x 3/4 x 15/16
Spacer, .635 x 1.0 x .27
Detent Shaft Assemblyt
Detent Shaft Assembly$
Differential Assemblyt
Differential Assembly$
Brake Assembly
Self-tapping Screw, 1/4-20 x 1.625
Self-tapping Screw, 1/4-20 x 2.375
Brake Pad
Compression Spring
Detent Ball
Brake Disc
Input Shaftt
Input Shafts
Retaining Ring, .394t
Retaining Ring, .4375
124ooth Bevel Piniont
14-tooth Bevel Pinions
Upper Housing
Thrust Washer, .63 x 1.24 x .062t
Thrust Washer, .635 x 1.25 x .0425
Needle Bearing, .625 x .875
Clutch Collars
Drive Shafts
Spacer, .633 x 1.0 x .513
42-tooth Bevel GearS
42-tooth Bevel GearS
Thrust Washer, 1.0 x .632 x .0
Sleeve Bearing, .75 x .1.0 x 1.0
Seal, .75 x 1.0 x .125
E-ring, .75
*If rebuilding transmission for any reason, use applicable flat washer (12a, 12b, or 12c) in this application allowing
proper end play as instructed in MTD's Service Manual.
IMPORTANT: One of two different transmissions may be found on your lawn tractor (618-0307B & 618-0307C). Refer to the
model plate found on the rear right portion of the transmission's lower housing before ordering replacement service parts.
fUsed on Single-speed transmission 618-0307B ONLY.
SUsed on Single-speed transmission 618-0307C ONLY.
35