McCulloch MC20H42YT Owner's manual

REPAIR PARTS MANUAL
MODEL NO. MC20H42YT (96048002700)
LAWN TRACTOR
01.23.12 BD
532 44 66-64 Printed in the U.S.A.
www.mcculloch.biz

HOW TO USE THIS MANUAL
This manual is designed to provide the customer with a means to identify the parts on his/her tractor
when ordering repair parts. The illustrations may or may not represent the actual assemblies; therefore,
it is not recommended to use this manual as a guide to assemble or disassemble the tractor. Some
hardware and parts are drawn larger in order to more readily identify them.
Each tractor has its own model number.
The model number for your tractor can be found on the fender under the seat.
When ordering parts, always give the following information:
• Product - “TRACTOR”
• MODEL NUMBER - “MC20H42YT (96048002700)”
• Part Number
• Part Description
TABLE OF CONTENTS
SCHEMATIC ................................................................................................................3
ELECTRICAL............................................................................................................4-5
CHASSIS ..................................................................................................................6-7
DRIVE........................................................................................................................8-9
ENGINE.................................................................................................................10-11
STEERING ............................................................................................................12-13
MOWER DECK .....................................................................................................14-15
MOWER LIFT.............................................................................................................16
SEAT ..........................................................................................................................17
DECALS..................................................................................................................... 18
WARRANTY...............................................................................................................20

3
M
FUSE
STARTER
SOLENOID
BATTERY
CLUTCH/BRAKE
(PEDAL UP)
REVERSE SWITCH
(NOT IN REVERSE)
SEAT SWITCH
(NOT OCCUPIED)
SHORTING
CONNECTOR
CHASSIS
HARNESS
IGNITION
UNIT
HOUR
METER
CHASSIS HARNESS
CONNECTOR
(MATING SIDE)
DASH HARNESS
CONNECTOR
(MATING SIDE)
FUEL
LINE
FUEL SHUT-OFF
SOLENOID
(IF SO EQUIPPED)
JUNCTION
CONNECTOR
SM
B
GL
2
3
1
6
A2
A1
M
63
52
41
6
5
4
3
2
1
SPARK
PLUGS GAP
(2 PLUGS ON
TWIN CYL. ENGINES)
(OPTIONAL)
NON-REMOVABLE
CONNECTIONS
REMOVABLE
CONNECTIONS
WIRING INSULATED CLIPS
NOTE: IF WIRING INSULATED
CLIPS WERE REMOVED FOR
SERVICING OF UNIT, THEY
SHOULD BE RE-INSTALLED TO
PROPERLY SECURE YOUR
WIRING.
SCH11
IGNITION SWITCH
CIRCUITPOSITION
OFF
B+A1
RUN/OVERRIDE
B+S+A1START
M+G+A1
B+A1RUN
“MAKE”
L+A2
ATTACHMENT CLUTCH
(CLUTCH OFF)
BLACK
BLACK /WHITE
BLUE
BLUE BLACK
BLACKBLACK
BLACK
BLACK
BLACK
BLACK
BLACK
DER
RED
WHITE
WHITE
GRAY
GRAY
BLACK
BLACK
POWER OUTLET
(OPTIONAL)
12V
BLACK
A
AMMETER
(OPTIONAL)
RED
BLACK
BROWN
HEADLIGHTS
LIGHT SWITCH ORANGE
LIGHTING SYSTEM OUTPUT
5 AMP AC @ 3600 RPM
ALTERNATOR
14 VOLTS AC MIN. @ 3600 RPM (LIGHTS OFF)
DIODE
28 VOLTS AC MIN. @ 3600 RPM
(CHARGING SYSTEM DISCONNECTED)
CHARGING SYSTEM OUTPUT
3 AMP DC @ 3600 RPM
NOTE
YOUR TRACTOR IS
EQUIPPED WITH A SPECIAL
ALTERNATOR SYSTEM.
THE LIGHTS ARE NOT
CONNECTED TO THE
BATTERY, BUT HAVE THEIR
OWN ELECTRICAL SOURCE.
BECAUSE OF THIS, THE
BRIGHTNESS OF THE LIGHTS
WILL CHANGE WITH ENGINE
SPEED. AT IDLE THE LIGHTS
WILL DIM. AS THE ENGINE IS
SPEEDED UP, THE LIGHTS
WILL BECOME THEIR
BRIGHTEST.
TRACTOR - MODEL NO. MC20H42YT (96048002700), PRODUCT NO. 960 48 00-27
SCHEMATIC

4
TRACTOR - MODEL NO. MC20H42YT (96048002700), PRODUCT NO. 960 48 00-27
ELECTRICAL
30
33
34
22
79 21
41
42
26
43
27
40
71
16
87
25
T02S
90
28
55
With 12V Outlet Option
59
103
With Service Minder Option
4646
94
92
29
93
2

5
TRACTOR - MODEL NO. MC20H42YT (96048002700), PRODUCT NO. 960 48 00-27
ELECTRICAL
KEY PART
NO. NO. DESCRIPTION
1 532 16 34-65 Battery
2 874 76 04-12 Bolt Hex Head 1/4-20 x 3/4
8 532 19 32-28 Box Battery
16 532 17 61-38 Switch Interlock Push-In
21 532 18 37-59 Harness Socket Light w/4152J
22 532 00 41-52 Bulb Light
25 532 41 28-94 Cable Starter
26 532 17 51-58 Fuse
27 873 51 04-00 Nut Keps Hex 1/4-20 unc
28 532 19 88-85 Cable, Ground
29 532 40 15-45 Switch, Seat
30 532 19 33-50 Switch, Ignition
33 532 41 19-35 Key/Chain
34 532 11 07-12 Switch Light/Reset
40 532 40 10-98 Harness Ignition Dash/Lift
41 817 72 04-08 Screw Thd Cut 1/4-20 x 1/2
42 532 13 15-63 Cover, Terminal
43 532 19 25-07 Solenoid
55 817 06 05-12 Screw Thdrol 5/16-18 x 3/4 TYTT
71 532 40 04-49 Harness Ignition Chassis/Lift
79 532 17 52-42 Socket Asm Bulb Twistlock
87 532 19 78-02 Switch Interlock Clutch Cable
90 532 43 53-95 Cover Terminal Battery
92 532 19 66-15 Harness Pigtail Console ROS
93 532 19 25-40 Screw Plastite 10-14 x 2.0
94 532 19 18-34 Module Reverse ROS
NOTE: All component dimensions given in U.S. inches
1 inch = 25.4 mm

6
TRACTOR - MODEL NO. MC20H42YT (96048002700), PRODUCT NO. 960 48 00-27
CHASSIS
68 68
68
183
236
236
34
235
235
150
151
130
182
176
176
176
175
177
37
181
181
194
194
36
36
162
196
287
138
14
137
130
18
191
297
15
25
205
206
5
176
176
chassis-tex_elite sv tv husq_14
189
189
152
228
228
194
180
159
159
139
139
278
68
68
68
289

7
TRACTOR - MODEL NO. MC20H42YT (96048002700), PRODUCT NO. 960 48 00-27
CHASSIS
5 532 44 68-34 Dash Upper
14 532 43 27-74 Hood
15 532 18 99-82 Lens Elite-Husq Clear LH
18 532 44 52-94 Grille
25 532 18 99-81 Lens Elite-Husq Clear RH
34 532 44 72-53 Plate Engine Welded Chassis
36 817 06 05-12 Screw 5/16-18 x 3/4 Smgml Tap/R
37 532 42 09-86 Fender
68 817 49 05-08 Screw Thdrol 5/16-18 x 1/2 tytt
130 532 41 63-58 Screw
137 532 18 49-21 Bumper Hood Large 1 75"
138 532 40 97-30 Cupholder TL Tex 428
139 532 17 18-73 Bolt Shoulder
150 532 43 16-32 Air Duct
151 532 40 78-07 Bracket Pivot Lasr/Elte/Husq LT
152 532 19 95-35 Shield browning w/tex
159 817 00 06-12 Screw Hexwsh Thdr 3/8-16 x 3/4
162 532 14 24-32 Screw Hex Wsh Hi-Lo 1/4 x 1/2 unc
175 532 19 32-43 Crossmember LT
176 532 40 07-76 Screw #10-24x5/8 Rnd Qudrx Gim
177 532 19 52-27 Bushing Steering YT/GT
180 532 19 54-57 Chass Wldmt TL 12 Ga.
181 532 40 47-96 Bushing Mnt Fend Crgo Blk Tex
182 532 19 30-57 Dash Lower LT ccs
183 874 52 05-20 Bolt Fin Hex 5/16-18 x 1-1/4
189 817 00 05-12 Screw 5/16-18 x 3/4 Smgml Tap/Bl
191 532 18 82-67 Insert Lens Reflective RH
194 873 90 05-00 Nut, Lock Hex Flange 5/16-18 unc
196 532 41 45-79 Console Asm Decklft Bl/Rbt Tlt
205 532 42 47-47 Skirt Side RH
206 532 42 47-48 Skirt Side LH
228 532 19 51-61 Stud Fastner w/'D'anti-Rotatio
235 532 40 61-29 Spacer Fender
236 873 93 05-00 Nut Center Lock 5/16-18 unc
278 532 19 63-94 Bracket Hood/Muffler
287 817 60 04-06 Screw Hex Washead 1/4-20 x 3/8
289 532 43 27-81 Plug Cruise Hook Phone
297 532 41 65-00 Insert Lens Reflective LH
NOTE: All component dimensions given in U.S. inches
1 inch = 25.4 mm
KEY PART
NO. NO. DESCRIPTION

8
TRACTOR - MODEL NO. MC20H42YT (96048002700), PRODUCT NO. 960 48 00-27
DRIVE
64
161
184
42
125
226
227
125
80 125
221
225
125
drive-tex_K46_fender_24_r1
211
70
74
116
2
2
73
73
33
205
1
116
33
230
230
183
183
205
175
279 176
178
174
22
23
166
232
153
233
166
99
17
159 15
35
167
160
188
186
189
49
29
187
50
51
52
51
190
185
159
171
51
52
170
216
56
143

9
TRACTOR - MODEL NO. MC20H42YT (96048002700), PRODUCT NO. 960 48 00-27
DRIVE
KEY PART
NO. NO. DESCRIPTION
1 – – – – – – Transaxle, Tufftorq K46 BA
(408214)(Order parts from
transaxle manufacturer.)
2 532 12 35-83 Key Square
15 819 13 13-16 Washer 13/32 x 13/16 x 16 Ga.
17 532 41 36-78 Spring, Brake
22 532 19 76-60 Rod Shift
23 532 14 08-45 Knob
29 532 40 38-06 Rod, Brake
33 812 00 00-01 Ring E
35 532 19 77-22 Rod, Brake, Park
42 532 12 48-72 Cover, Foot Pedal
49 872 11 06-14 Bolt
50 532 19 43-27 Pulley Idler Flat
51 873 90 06-00 Lock Nut 3/8-16
52 532 19 43-26 Idler V-Groove
56 532 13 09-69 V-Belt, Drive
64 532 19 62-00 Shaft Asm. Pedal Brake Control
70 532 41 13-29 Console
73 874 49 05-40 Bolt 5/16-18 x 2 1/2
74 532 14 24-32 Screw 1/4 x 1/2
80 532 44 06-19 Strap Torque
99 532 41 57-42 Rod Asm Bypass
116 873 90 05-00 Nut Lock Hex Flange 5/16-18
125 817 00 05-12 Screw 5/16-18 x 3/4
143 817 49 05-08 Screw 5/16-18 x 1/2
153 532 12 47-88 Retainer Spring
159 876 02 04-12 Pin Cotter 1/8 x 3/4
160 532 16 94-84 Retainer Clip
161 532 10 57-09 Spring, Return, Clutch
166 532 42 91-64 Nut Push .625
167 532 40 52-57 Latch Brake Parking
170 532 19 43-22 Keeper Belt Centerspan
171 872 11 06-16 Bolt Rdhd Sqnk 3/8-16 x 2
174 532 19 72-89 Nut Push
175 532 40 62-08 Shaft Asm Shift
176 532 19 62-14 Arm Clevis Rod Shift
178 532 19 74-56 Spring Shift
183 532 13 70-57 Spacer, Axle
184 532 44 15-04 Handle Parking Brake
185 872 11 06-22 Bolt
186 532 19 43-21 Spacer Retainer
187 819 13 32-10 Washer
188 532 19 43-23 Link Clutch Ground Drive
189 532 19 43-17 Bellcrank Ground Drive
190 532 19 43-18 Keeper Bellcrank Ground Drive
205 532 12 17-48 Washer 25/32 x 1-5/8 x 16 Ga.
211 532 19 62-12 Bushing Brake Shaft
216 532 19 61-31 Bracket Pulley Idler
221 532 40 31-87 Retainer Spring Clip Handle
225 532 40 33-19 Keeper Belt Trans.
226 532 40 15-64 Bracket Mount Torque
227 817 49 05-12 Screw Thdrol 5/16-18 x 3/4
230 532 18 89-67 Washer Hardened
232 874 78 07-16 Bolt 7/16-14 x 1 Gr. 5
233 532 40 52-96 Washer Serrated
279 532 40 62-07 Link Shift
NOTE: All component dimensions given in U.S. inches
1 inch = 25.4 mm
KEY PART
NO. NO. DESCRIPTION

10
TRACTOR - MODEL NO. MC20H42YT (96048002700), PRODUCT NO. 960 48 00-27
ENGINE
21
20
OPTIONAL EQUIPMENT
SPARK ARRESTER
29
12
42
85
9
90
84
45
1
81
82
94
69
2
87
37
28
37
18
15
97
96
79
engine-tex_BS_63