This manual was written for the service technician; basic mechanical/electrical skills are assumed. The Table of
Contents lists the systems and the related topics covered in this manual. The Toro Company has made every
effort to make the information in this manual complete and correct.
For service information specific to the engines used on these products, refer to the appropriate engine
manufacturer’s service and repair instructions.
Additional resources:
•Interactive Electrical Troubleshooting CD (PN 492-4757).
•Interactive Hydraulic Troubleshooting CD (PN 492-4777).
•Hydro-Gear Hydraulic Pump Service and Repair Manual (PN 492-4749).
•Ross Wheel Motor Service and Repair Manual (PN 492-4753).
We hope you will find this manual a valuable addition to your service shop. If you have any questions or comments
regarding this manual, please contact us at the following address:
The Toro Company
Landscape Contractors Equipment Division
8111 Lyndale Avenue South
Bloomington, MN 55420
The Toro Company reserves the right to change product specifications or this manual without notice.
This symbol means WARNING or
PERSONAL SAFETY INSTRUCTION read the instruction because it has to
do with your safety. Failure to comply
with the instruction may result in
personal injury or even death.
This manual is intended as a service and repair
manual only. The safety instructions provided herein
are for troubleshooting, service, and repair of the MidSize Walk Behind mower. The Mid-Size Walk Behind
Think Safety First
SAFETY INFORMATION
Mower and attachment operator’s manuals contain
safety information and operating tips for safe operating
practices. Operator’s manuals are available through
your Toro parts source or:
The Toro Company
Publications Department
8111 Lyndale Avenue South
Bloomington, MN 55420
Avoid unexpected starting of engine...
Always turn off the engine and disconnect the spark
plug wire(s) before cleaning, adjusting, or repair.
Avoid lacerations and amputations...
Stay clear of all moving parts whenever the engine is
running. Treat all normally moving parts as if they were
moving whenever the engine is running or has the
potential to start.
Avoid burns...
Do not touch the engine, muffler, or other components
which may increase in temperature during operation,
while the unit is running or shortly after it has been
running.
Avoid fires and explosions...
Avoid spilling fuel and never smoke while working with
any type of fuel or lubricant. Wipe up any spilled fuel or
oil immediately. Never remove the fuel cap or add fuel
when the engine is running. Always use approved,
labeled containers for storing or transporting fuel and
lubricants.
Avoid injury from batteries...
Battery acid is poisonous and can cause burns. Avoid
contact with skin, eyes, and clothing. Battery gases
can explode. Keep cigarettes, sparks, and flames away
from the battery.
Avoid injury due to inferior parts...
Use only original equipment parts to ensure that
important safety criteria are met.
Avoid injury to bystanders...
Always clear the area of bystanders before starting or
testing powered equipment.
Avoid injury due to projectiles...
Always clear the area of sticks, rocks, or any other
debris that could be picked up and thrown by the
powered equipment.
Avoid modifications...
Never alter or modify any part unless it is a factory
approved procedure.
Avoid asphyxiation...
Never operate an engine in a confined area without
proper ventilation.
Mid-Size Walk Behind Service Manual 1 - 1
Avoid unsafe operation...
Always test the safety interlock system after making
adjustments or repairs on the machine. Refer to the
Electrical section in this manual for more information.
THIS PAGE INTENTIONALLY LEFT BLANK
1 - 2Mid-Size Walk Behind Service Manual
SPECIFICATIONS
Torque Specifications
Recommended fastener torque values are listed in the
following tables. For critical applications, as
determined by Toro, either the recommended torque or
a torque that is unique to the application is clearly
identified and specified in the service manual.
These torque specifications for the installation and
tightening of fasteners shall apply to all fasteners which
do not have a specific requirement identified in the
service manual. The following factors shall be
considered when applying torque: cleanliness of the
fastener, use of a thread sealant (Loctite), degree of
lubrication on the fastener, presence of a prevailing
torque feature, hardness of the surface underneath of
the fastener’s head, or similar condition which affects
the installation.
As noted in the following tables, torque values should
be reduced by 25% for lubricated fasteners to
achieve the similar stress as a dry fastener. Torque
values may also have to be reduced when the fastener
is threaded into aluminum or brass. The specific
torque value should be determined based on the
aluminum or brass material strength, fastener size,
length of thread engagement, etc.
Fastener Identification
Inch Series Bolts and Screws
(A) Grade 1 & 2
(B) Grade 5
Figure 1
(C) Grade 8
The standard method of verifying torque shall be
performed by marking a line on the fastener (head or
nut) and mating part, then back off fastener 1/4 of a
turn. Measure the torque required to tighten the
fastener until the lines match up.
Figure 2
Metric Bolts and Screws
(A) Class 8.8(B) Class 10.9
Mid-Size Walk Behind Service Manual 2 - 1
SPECIFICATIONS
Standard Torque for Dry, Zinc Plated, and Steel Fasteners (Inch Series)
SAE Grade 1 Bolts, Screws,
Studs, & Sems with Regular
Height Nuts (SAE J995
Grade 2 or Stronger Nuts)
SAE Grade 5 Bolts, Screws,
Studs, & Sems with Regular
Height Nuts (SAE J995
Grade 2 or Stronger Nuts)
15 ± 2169 ± 2323 ± 2260 ± 34
29 ± 3330 ± 3041 ± 4460 ± 45
42 ± 4475 ± 4560 ± 6674 ± 70
SAE Grade 8 Bolts, Screws,
Studs, & Sems with Regular
Height Nuts (SAE J995
Grade 2 or Stronger Nuts)
Note: Reduce torque values listed in the table above
by 25% for lubricated fasteners. Lubricated fasteners
are defined as threads coated with a lubricant such as
oil, graphite, or thread sealant such as Loctite.
Note: The nominal torque values listed above for
Grade 5 and 8 fasteners are based on 75% of the
minimum proof load specified in SAE J429. The
tolerance is approximately ± 10% of the nominal torque
value. Thin height nuts include jam nuts.
Note: Torque values may have to be reduced when
installing fasteners into threaded aluminum or brass.
The specific torque value should be determined based
on the fastener size, the aluminum or base material
strength, length of thread engagement, etc.
2 - 2Mid-Size Walk Behind Service Manual
SPECIFICATIONS
Standard Torque for Dry, Zinc, and Steel Fasteners (Metric Fasteners)
Note: Reduce torque values listed in the table above
by 25% for lubricated fasteners. Lubricated fasteners
are defined as threads coated with a lubricant such as
oil, graphite, or thread sealant such as Loctite.
Regular Height Nuts
(Class 8 or Strong Nuts)
Note: The nominal torque values listed above are
based on 75% of the minimum proof load specified in
SAE J1199. The tolerance is approximately ± 10% of
the nominal torque value. Thin height nuts include jam
Class 10.9 Bolts, Screws, and Studs with
Regular Height Nuts (
Class 10 or Strong Nuts)
nuts.
Note: Torque values may have to be reduced when
installing fasteners into threaded aluminum or brass.
The specific torque value should be determined based
on the fastener size, the aluminum or base material
strength, length of thread engagement, etc.
Mid-Size Walk Behind Service Manual 2 - 3
SPECIFICATIONS
Other Torque Specifications
SAE Grade 8 Steel Set Screws
Recommended Torque
Thread Size
Square HeadHex Socket
1/4 - 20 UNC140 ± 20 in-lb73 ± 12 in-lb
5/16 - 18 UNC215 ± 35 in-lb145 ± 20 in-lb
3/8 - 16 UNC35 ± 10 ft-lb18 ± 3 ft-lb
1/2 - 13 UNC75 ± 15 ft-lb50 ± 10 ft-lb
Thread Cutting Screws
(Zinc Plated Steel)
Type 1, Type 23, or Type F
Thread SizeBaseline Torque*
No. 6 - 32 UNC20 ± 5 in-lb
Wheel Bolts and Lug Nuts
Thread SizeRecommended Torque**
7/16 - 20 UNF
Grade 5
1/2 - 20 UNF
Grade 5
M12 X 1.25
Class 8.8
M12 X 1.5
Class 8.8
65 ± 10 ft-lb88 ± 14 N-m
80 ± 10 ft-lb108 ± 14 N-m
80 ± 10 ft-lb108 ± 14 N-m
80 ± 10 ft-lb108 ± 14 N-m
** For steel wheels and non-lubricated fasteners.
Thread Cutting Screws
(Zinc Plated Steel)
Thread
Size
No. 6182020 ± 5 in-lb
Threads per Inch
Baseline Torque*
Typ e ATyp e B
No. 8 - 32 UNC30 ± 5 in-lb
No.10 - 24 UNC38 ± 7 in-lb
1/4 - 20 UNC85 ± 15 in-lb
5/16 - 18 UNC110 ± 20 in-lb
3/8 - 16 UNC200 ± 100 in-lb
Conversion Factors
in-lb X 11.2985 = N-cm
ft-lb X 1.3558 = N-m
No. 8151830 ± 5 in-lb
No. 10121638 ± 7 in-lb
No. 12111485 ± 15 in-lb
* Hole size, material strength, material thickness and
finish must be considered when determining specific
torque values. All torque values are based on nonlubricated fasteners.
30520 2002-2003 32.0" 40.0" 78" 420 9 X 3.5 - 4" (23 X
30521 2002-2003 35.6" 41.0" 78" 430 9 X 3.5 - 4" (23 X
30523 2002-2004 35.0" 41" 72" 475 9 X 3.5 - 4" (23 X
30524 2002-2004 46.1 43.2" 78" 433 9 X 3.5 - 4" (23 X
30526 2002-2003 58.2" 43.2" 73" 483 9 X 3.5 - 4" (23 X
30527 2003-2004 46.1" 43.2 78" 430 9 X 3.5 - 4" (23 X
30528 2003-2004 58.2" 43.2" 73" 483 9 X 3.5 - 4" (23 X
30529 2003-2004 35.6" 41" 78" 430 9 X 3.5 - 4" (23 X
305302003-200435.0" 41" 72"4759 X 3.5 - 4" (23 X
30531 2004 35.0" 41" 72" 475 9 X 3.5 - 4" (23 X
Mid-Size Walk Behind Service Manual 2 - 13
SPECIFICATIONS
kPa)
kPa)
kPa)
kPa)
kPa)
12-14 PSI (83-97
12-14 PSI (83-97
12-14 PSI (83-97
12-14 PSI (83-97
Tire DimensionsTire Pressure
(lbs.)
NA 12-14 PSI (83-97
FrontRearFrontRear
11"x4.00-5" 16x6.50" – 8
20-24 PSI (138-165
(40.6x16.5 – 20.3 mm)
11"x4.00-5" 16x6.50" – 8
KG)
kPa)
(40.6x16.5 – 20.3 mm)
KG)
kPa)
20-24 PSI (138-165
16x6.50" – 8
(40.6x16.5 – 20.3 mm
10cm)
9x3.5-4 (23x9-
KG)
kPa)
kPa)
20-24 PSI (138-165
20-24 PSI (138-165
16x6.50 – 8"
(40.6x19.4 – 20.3 mm)
(40.6x16.5 – 20.3 mm)
11"x4.00-5" 16x7.50" – 8
9 – 10 cm)
KG)
ModelYears WidthHeightLength Weight
30172TE 2001 48.31 44.1 83.55 250 (113
30261TE2003-2004 48.3 45.5 80.5 469 (213
30250TE 2001 48.31 44.1 83.55 469 (213
30528 2003-2004 58.2" 43.2" 73" 483 9 X 3.5 - 4" (23 X
30291TE 2001 58.73 44.1 79.92 560 (254
2 - 14Mid-Size Walk Behind Service Manual
SPECIFICATIONS
Floating Deck
Classic T-Bar / Gear Drive /
Only
Classic T-Bar / Gear / Traction Unit
Deck
Pistol Grip / Hydro Drive / Floating
30183
30185
30225
Floating Deck
T-Bar / Hydro Drive /
30441
Model ID
Fixed Deck
Pistol Grip / Hydo Drive /
Fixed Deck
Pistol Grip / Gear Drive /
Deck
T-Bar / Gear Drive / Fixed
3014030518305243011930316
Floating Deck
Pistol Grip / Gear Drive /
302583043130436
302593043230338
302603043730439
303173043830440
30318
30319
30320
30321
30322
30326
30327
30342
Floating Deck
T-Bar / Gear Drive /
3018730250303293029030339
3018830251303323029130340
3018930253303333029230341
3019130254303343029730433
30150305193052630159
30161305203052730165
30164305213052830167
301713052330168
301783052930169
301843053030177
301933053130182
30194
30195
30196
30197
/ Traction Unit Only
Classic T-Bar / Hydro Drive
3019230255303353029630434
*30299TE302573043030291TE30435
30172TE
30250TE
30261TE
30314TE
Mid-Size Walk Behind Service Manual 2 - 15
MAINTENANCE
Maintenance Schedule, Floating Deck Models
Maintenance ServiceInterval Maintenance Procedure
Each Use• Engine Oil—check level
• Safety System—check
• Brake—check
• Engine—clean outside
• Mower Housing—clean
8 Hours• Engine Oil—change
• Cutting Blades—check
• Mower Housing—clean
• Caster Wheels—grease
25 Hours
• Foam Air Cleaner—clean
• Paper Air Cleaner—check, replace if dirty
40 Hours• Deck Belt Idler Arm—grease
• Deck Belt Idler Arm—grease
1
• Tires—check pressure
•Hydraulic Oil—check
50 Hours• Belts—check for wear/cracks
100 Hours
• Engine Oil—change
1
• Spark Plug(s)—check
• Electric Clutch–Adjust
• Engine—clean outside
• Paper Air Cleaner—replace
1
200 Hours• Engine Oil Filter—change (200 hours or every other oil change)
• Fuel Filter—replace
250 Hours
400 Hours
• Transmission Couplings—grease
• Wheel Bearings—grease
1
1
At Storage• Chipped Surfaces—paint
• Perform all maintenance procedures listed above before storage
1
More often in dusty, dirty conditions.
2 - 16Mid-Size Walk Behind Service Manual
Maintenance Schedule, Fixed Deck Models
MAINTENANCE
Service OperationEach
Use8Hours25Hours50Hours
Oil—check levelXX
Oil—change*InitialXX
Oil Filter—change (200 hours or every other
oil change)
Safety System—checkXX
Brakes—checkXX
Cutting Blades — checkXXX
Wheel Bearings—grease*XX
Transmission Couplers — grease*XX
Idler Pivots — grease*XX
Belt Blade Idler Pivots — grease*XX
Foam Air Cleaner—service*XX
Paper Air Cleaner—replace*XX
Spark Plug(s)—checkXX
Belts—check for wear/cracksXX
PTO Belt—check tensionInitialXX
Gasoline—drainX
Engine—clean cooling systemXXX
Fuel Filter—replaceXX
Tires—check pressureXX
Chipped Surfaces—paintX
* More often in dusty, dirty conditions
100
Hours
200
Hours
XX
Storage
Service
Mid-Size Walk Behind Service Manual 2 - 17
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2 - 18Mid-Size Walk Behind Service Manual
ENGINE
Engine Removal
1.Turn the fuel valve to the “off” position.
2.Drain the engine oil into a suitable container.
3.Remove the fuel line by sliding clamp down and
remove the line from fuel pump (Figure 3). Drain
fuel in line into a suitable container.
6.Cut the tie wrap and disconnect the mag wire (red
from black) bullet connector (Figure 5).
Figure 5
7.Remove the screw attaching the ground wire to
the air shroud.
8.Remove the bolt securing the harness to the
engine block.
0602-12
Figure 3
4.Remove bolt that clamps the fuel line to engine
block (Figure 4).
Figure 4
5.Slide the wiring out from under the clip on the air
shroud.
mvc-048
mvc-409
9.Pull the harness out from behind the oil fill tube
and move it away from the engine to prevent
damage.
On Floating Deck Models:
10. Disconnect the alternator wire connector (red to
pink) (Figure 6).
Figure 6
Mid-Size Walk Behind Service Manual3 - 1
0819-32
ENGINE
11. Separate the electric clutch connector and push
the connector and grommet through the frame
(Figure 7).
Figure 7
12. Remove the air cleaner cover.
13. Then remove the clamps holding the throttle and
choke cables to the engine (Figure 8). Mark the
cable housings for the clamp locations to assist in
reassembly. Remove the throttle and choke
cables.
0819-30
15. If the unit is up, no need to remove the deck
covers.
16. Remove deck drive belt from deck idler and drive
pulley (Figure 9).
Figure 9
17. Remove hydro pump drive belt (Figure 10).
mvc-412
A
B
Figure 8
(A) Choke(B) Throttle
14. Remove the drive pulleys.
0602-10
Figure 10
mvc-415
3 - 2Mid-Size Walk Behind Service Manual
ENGINE
18. Remove PTO clutch arm from housing (Figure 11).
Figure 11
19. Sometimes it is necessary to remove the PTO
clutch brake pulley to have better access for
removing the clutch bolt (Figure 12 and Figure
14).
0820-05
20. On gear drive models, remove the V belt from the
transmission sheave (Figure 13).
Figure 13
mvc-417
Figure 14mvc-418
Figure 12
Mid-Size Walk Behind Service Manual3 - 3
mvc-417
ENGINE
21. Remove pulley cover (Figure 15).
Figure 15
22. Unbolt clutch bolt, remove clutch and engine
pulley (Figure 16 and Figure 17).
mvc-419
Figure 17mvc-424
23. Remove the nuts and bolts that mount engine to
chassis (Figure 18).
Figure 18
Figure 16
3 - 4Mid-Size Walk Behind Service Manual
mvc-421
Reverse order for reassembly - Torque clutch bolt to 55
to 60 ft. lbs. (75 to 81 N-m).
mvc-423
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