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37
REF.
NO.
PART
NO. DESCRIPTION
1 618-0318 Clutch Collar†
2 710-0788 Self-tapping Screw, 1/4-20 x 1.0
3 711-1274 Drive Shaft
4 711-1280 Counter Shaft
5 713-0474 22-link Chain, #420
6 713-0478 14-tooth Sprocket
7 717-1422 Sprocket Bevel Gear, 42/10
8 717-1565 29-tooth Spur Gear
9 717-1569 20-tooth Spur Gear
10 718-0652 Counter Shaft Coupling
11 719-0394 Lower Housing
12a 736-0336 Flat Washer, 5/8 x 1.0 x .030*
12b 736-0337 Flat Washer, 5/8 x 1.0 x .040*
12c 736-0349 Flat Washer, 5/8 x 1.0 x .020*
13 736-0519 Flat Washer, .70 x 1.125 x .031
14 741-0336 Flange Bearing, 5/8 x 3/4 x 3/4
15 741-0337 Flange Bearing, 5/8 x 3/4 x 15/16
16 750-1238 Spacer, .635 x 1.0 x .27
17 611-0112 Detent Shaft Assembly†
611-0133 Detent Shaft Assembly‡
18 618-0369 Differential Assembly†
618-0424 Differential Assembly‡
19 661-0006 Brake Assembly
20 710-1325 Self-tapping Screw, 1/4-20 x 1.625
21 710-1206 Self-tapping Screw, 1/4-20 x 2.375
22 717-0678 Brake Pad
23 732-0863 Compression Spring
24 741-0862 Detent Ball
25 761-0202 Brake Disc
26 711-1331 Input Shaft†
711-1430 Input Shaft‡
27 716-0385 Retaining Ring, .394†
716-0108 Retaining Ring, .437‡
28 717-1571 12-tooth Bevel Pinion†
717-1464 14-tooth Bevel Pinion‡
29 719-0391A Upper Housing
30 736-0335 Thrust Washer, .63 x 1.24 x .062†
736-0723 Thrust Washer, .635 x 1.25 x .042‡
31 741-0525 Needle Bearing, .625 x .875
32 718-0228 Clutch Collar‡
33 711-1431 Drive Shaft‡
34 750-1234 Spacer, .633 x 1.0 x .513
35 717-1362 42-tooth Bevel Gear‡
36 717-1363 42-tooth Bevel Gear‡
37 736-0495 Thrust Washer, 1.0 x .632 x .0
38 741-0340 Sleeve Bearing, .75 x .1.0 x 1.0
39 721-0338 Seal, .75 x 1.0 x .125
40 716-0231 E-ring, .75
41 618-0551 Transmission Assembly Complete
Single-speed Transmission
*If rebuilding transmission for any reason, use applicable flat washer (12a, 12b, or 12c) in this application allowing
†Used on Single-speed transmission 618-0307B ONLY.
‡Used on Single-speed transmission 618-0307C ONLY.
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.
proper end play as instructed in MTD ’s Service Manual.