Section
For Parts Call 606-678-9623 or 606-561-4983
For Parts Call 606-678-9623 or 606-561-4983
1
13
6
9
7
(A) For Model 640C
(B) For Model 644A
Parts List
4
15
1
12
9
7
3
5
7
19
10
6
14
2
11
17
16
23
4
20
7
15
18
22
24
21
REF
NO.
1 715-0108 Spirol Pin
2 710-0597 Hex Hd. Screw, 1/4-20 x 1
3 710-0599 Screw, Self-Tapping,1/4-20 x 1/2
4 710-0874 Hex Hd. Screw, 5/16-18 x 1-1/4
5 710-3008 Hex Hd. Screw, 5/16-18 x .75
6 712-04064 Hex Lock Nut, Nylon, 1/4-20
7 712-04063 Hex Lock Nut, Nylon, 5/16-18
8 1916707 Channel Support Bracket
9 736-0119 Lock Washer, 5/16
10 GW-55013-1 Hood Bracket, Left Hand
11 GW-55013-2 Hood Bracket, Right Hand
12 GW-55015 Drag Bar
13 GW-55018 Depth Regulator Lever
PART NO. DESCRIPTION
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REF
NO.
14 686-04043 Tine Hood Assembly (A)
15 GW-55088 Bushing
16 GW-9384 Spring, Depth Regulator
17 GW-9534 Spacer
18 710-04048 Hex Hd. Flange Screw, 5/16-18 x 1
19 618-04254 Transmission Assembly (A)
20 786-04191 Flap Stop Bracket
21 1916570 Reverse Stop Arm
22 710-0395 Hex Screw, 5/16-18 x 2.25
23 1916771 Spacer, .462 x .328 x 1.63
24 736-0275 Flat Washer, 5/16
23
PART NO. DESCRIPTION
686-04041 Tine Hood Assembly (B)
618-04046 Transmission Assembly (B)
For Parts Call 606-678-9623 or 606-561-4983
For Parts Call 606-678-9623 or 606-561-4983
MODELS 640C & 644A
2
5
5
10
20
13
17
22
15
3
16
12
1
21
14
18
9
23
8
7
25
7
18
11
4
6
24
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For Parts Call 606-678-9623 or 606-561-4983
For Parts Call 606-678-9623 or 606-561-4983
MODELS 640C & 644A
REF
NO.
1 1916719 Cable Assembly, Reverse Clutch (B)
2 1916755 Upper Handlebar
3 747-04210 Bail, Forward Clutch
4 1918745 Cable Assembly, Forward Clutch
5 710-0599 Screw, Self-Tapping,1/4-20 x 1/2
6 710-3008 Screw, Hex, 5/16-18 x 3/4
7 712-3009 Hex Lock Nut, 5/16-18
8 786-04188 Handlebar Support
9 GW-55043 Lower Handlebar
10 786-04200 Panel
11 GW-55044 Tab, Conduit Mount
12 GW-9855 Screw, #10-24 x 2
13 725-0157 Cable Tie
14 736-3050 Flat Washer, 3/8
15 732-04040 Bracket, Reverse Clutch Cable (B)
16 732-04185 Spring, Forward Clutch
17 710-0106 Hex Hd. Screw, 1/4-20 x 1-1/4
18 710-0216 Screw, Hex, 3/8-16 x 3/4
20 710-0805 Screw, Hex, 5/16-18 x 1-1/2
21 712-0121 Hex Nut, #10-24
22 712-0291 Hex Lock Nut, 1/4-20
23 712-3000 Hex Nut, 3/8-16
25 736-0119 Lock Washer, 5/16
PART NO. DESCRIPTION
REF
NO.
1 749-04193 Bumper (B)
2 710-0395 Hex Screw, 5/16-18 x 2-1/4, Gr5 (B)
3 726-0201 Nut, Speed, 5/16-18 (B)
4 712-04063 Hex Lock Nut, Nylon, 5/16-18 (B)
(A) For Model 640C
(B) For Model 644A
PART NO. DESCRIPTION
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25
1
4
3
2
For Parts Call 606-678-9623 or 606-561-4983
For Parts Call 606-678-9623 or 606-561-4983
MODELS 640C & 644A
1
2
3
4
2
5
REF
NO.
1 GW-9517 Snap Ring
2 GW-1714 Bearing, Tapered Roller (with race)
3 GW-50043 Support Washer, Rear
4 711-04110 Drive Shaft
5 GW-1224-1* Shim, Rear Bearing Cap, .010" thick
— GW-1325C Shim Set (Incl. the following shims:
* Use as required to obtain between .005” and .015” allowable end-play.
PART NO. DESCRIPTION
GW-1224-2* Shim, same as above, except .030" thick
GW-1224-3* Shim, same as above, except .005" thick
GW-1224-4* Shim, same as above, except .062" thick
two #1224-1, two 1224-2 & one #1224-4)
1
2
5
7
8
6
8
9
10
12
2
4
6
11*
10
3
14
REF
NO.
1 GW-9727 Plug, Transmission Oil Fill
2 710-04049 Hex Hd. Flange Screw, 5/16-18 x 5/8,Gr. 5
3 736-0119 Lock Washer, 5/16
4 1918377 Rear Cover, Transmission
5 1916641 Front Cover, Transmission
6 GW-50032 Gasket, Housing Cover
7 721-04030 Oil Seal, Drive Shaft
8 721-04031 Oil Seal, Wheel Shaft
9 619-04013 Transmission Housing Assembly
10 721-04036 Oil Seal, Tine Shaft
11 736-3008* Washer, Flat, .344 x .750 x .120
12 718-04008 Rear Bearing Cap
13 710-04048 Hex Hd. Flange Screw, 5/16-18 x 1
14 710-3008 Hex Hd. Flange Screw, 5/16-18 x 3/4
13
PART NO. DESCRIPTION
*Included with transmission when purchased as an assembly only.
Remove and discard when installing the transmission on tiller.
26
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For Parts Call 606-678-9623 or 606-561-4983
For Parts Call 606-678-9623 or 606-561-4983
MODELS 640C & 644A
8
6
7
1
2
3
4
FRONT
(A) For Model 640C
(B) For Model 644A
11
10
7
4
3
2
REF
NO.
1 GW-9512 Retainer, Snap Ring, “E” Type
2 1909950 Retainer, Snap Ring
3 GW-1166-1* Shim, 0.062" thick
4 GW-1086 Bronze Bushing
5 711-04088 Wheel Shaft (A)
6 GW-9305 Key, Hi-Pro, 1/4 x 1
7 GW-1132-2 Spacer
8 1904278 Worm Gear, Wheel Shaft
9 711-04078 Tiller Shaft
10 GW-1104 Woodruff Key
11 1916542 Worm Gear, Tiller Shaft
PART NO. DESCRIPTION
GW-1166-2* Shim, 0.030" thick
GW-1166-3* Shim, 0.015" thick
GW-1166-4* Shim, 0.010" thick
GW-1166-5* Shim, 0.005" thick
711-04092 Wheel Shaft (B)
5
9
* Use as required to obtain between .005” and .030” allowable end-play.
27
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For Parts Call 606-678-9623 or 606-561-4983
For Parts Call 606-678-9623 or 606-561-4983
MODELS 640C & 644A
40
21
23
18
16
28
29
36
19
38
39
26
42
33
REVERSE
CLUTCH CABLE
15
28
28
2
37
43
3
31
32
38
8
16
10
7
25
17
20
5
1
12
1
11
1
28
19
9
30
24
27
14
24
4
34
FORWARD
CLUTCH CABLE
35
28
41
13
22
22
6
24
28
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For Parts Call 606-678-9623 or 606-561-4983
For Parts Call 606-678-9623 or 606-561-4983
MODELS 640C & 640A
REF
NO.
1 736-0159 Flat Washer, 5/16
2 714-0139 Key, 3/16" x 2" (A)
3 1916351 Pulley, Engine Drive
4 656-04023 Transmission Pulley (A)
5 1916535 Pulley, Reverse Idler (B)
6 1916652 Guard, Belts/Pulleys
7 1916657 Forward Drive Belt
8 1916658 Reverse Drive Belt (B)
9 1916660 Belt Cover
10 1916724 Reverse Return Spring (B)
11 1916725 Belt Guide (B)
12 1916726 Forward Belt Guide
13 1916794 Engine Bracket, Left
14 1916795 Engine Bracket, Right
15 1917326 Bracket, Belt Cover
16 1917746 Shoulder Washer
17 1918731 Reverse Idler Arm (B)
18 1918744 Forward Idler Lever
19 710-0627 Hex Hd. Screw, 5/16-24 x 1.25 (A)
20 710-0237 Hex Hd. Screw, 5/16-24 x 5⁄8
21 710-0376 Hex Hd. Screw, 5/16-18 x 1
PART NO. DESCRIPTION
1108841 Key, 3/16" x 1-1/2" (B)
656-04005 Transmission Pulley (B)
710-0117 Hex Hd. Screw, 5/16-24 x 1 (B)
REF
NO.
22 710-04049 Hex Hd. Screw, 5/16-18 x 5/8
23 710-0347 Hex Hd. Screw, 3/8-16 x 1-3/4
24 710-0599 Screw, Self-Tapping, 1/4-20 x 1/2
25 710-3103 Hex Hd. Screw, 5/16-18 x 2 (B)
26 712-3000 Lock Nut, 3/8-16
27 712-3009 Lock Nut, 5/16-18
28 736-0119 Lock Washer, 5/16
29 750-0535 Spacer, .380 ID x .625 OD x .21
30 736-3090 Flat Washer
31 736-0452 Bell Washer
32 710-0151 Hex Hd. Screw, 3/8-24 x 2.0, GR5
33 GW-50027 Support Washer
34 GW-55034 Forward Return Spring
35 GW-55049 Bracket, Cable Mounting
36 GW-9090 Forward Idler Pulley
37 GW-9301 Key, 3/16" x 1"
38 736-3078 Flat Washer
39 GW-9944 Belleville Washer
40 710-0395 Hex Screw, 5/16-18 x 2.25 Gr5 (A)
41 712-3010 Nut, Hex Lock, 5/16-18 (A)
42 750-0258 Spacer, Shoulder (A)
43 736-0315 Washer, Flat, .75 x 1.5 x .125 (A)
PART NO. DESCRIPTION
GW-1138-2 Shim, 1.0 x .765 x .031 (B)
(A) For Model 640C
(B) For Model 644A
29
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For Parts Call 606-678-9623 or 606-561-4983
For Parts Call 606-678-9623 or 606-561-4983
MODELS 640C & 644A
5
5
1
3
9
3
TINE SHAFT
2
9
7, 8
7
10
FORWARD
REF
NO.
1 710-0514 Hex Hd. Screw, 3/8-16 x 1, Grade 5
2 GW-50049-02 Single Bolo Tine - Left Hand
3 712-3000 Hex Lock Nut, 3/8-16
4 710-0347 Hex Hd. Screw, 3/8-16 x 1-3/4
5 GW-50049-01 Single Bolo Tine - Right Hand
6 1915075 Tine Holder (A)
7 1917486 Wheel & Tire Ass’y — Left/Right Side(B)
8 734-04161 Wheel & Tire Ass’y — Right Side Only (A)
9 GW-9380 Clevis Pin, .312" x 1-3/4"
10 GW-9338 Hair Pin Cotter
— GW-1901 Bolo Tine Replacement Set (Incl. eight
PART NO. DESCRIPTION
1916747 Tine Holder (B)
734-04162 Wheel & Tire Ass’y — Left Side Only (A)
right-hand tines, eight left-hand tines and
required hardware. (A) (B)
4
1
2
Hold Tines With Blunt End Toward You
RIGHT-HAND TINE LEFT-HAND TINE
NOTE: Identify Left and Right sides of tiller by standing in
operator position and facing direction of forward travel.
3
(A) For Model 640C
(B) For Model 644A
30
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