MTD 607 Operator's Manual page 37

*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.
†Used on Single-speed transmission 618-0307B ONLY.
‡Used on Single-speed transmission 618-0307C ONLY.
Single-speed Transmission
REF. PART
NO. NO.
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
DESCRIPTION
37