Toro ProForce Debris User manual

PRELIMINARY – For Toro Distributor and Toro Company use only. Part No.
Service Manual
ProForceRDebris Blower
Preface
The purpose of this publication is to provide the service
technician with information for troubleshooting, testing
and repair of major systems and components on the
ProForce Debris Blower.
REFER TO THE OPERATOR’S MANUALS FOR OP-
ERATING, MAINTENANCE AND ADJUSTMENT
INSTRUCTIONS. Space is provided in Chapter 2 of this
book to insert the Operator’s Manuals and Parts Cata-
logs for your machine. Replacement Operator’s Manu-
als are available on the internet at www.toro.com or by
sending complete Model and Serial Number to:
The Toro Company
Attn. Technical Publications
8111 Lyndale Avenue South
Minneapolis, MN 55420
The Toro Company reserves the right to change product
specifications or this publication without notice.
This safety symbol means DANGER, WARNING,
or CAUTION, PERSONAL SAFETY INSTRUC-
TION. When you see this symbol, carefully read
the instructions that follow. Failure to obey the
instructions may result in personal injury.
NOTE: A NOTE will give general information about the
correct operation, maintenance, service, testing or re-
pair of the machine.
IMPORTANT: The IMPORTANT notice will give im-
portant instructions which must be followed to pre-
vent damage to systems or components on the
machine.
EThe Toro Company −2008

PRELIMINARY – For Toro Distributor and Toro Company use only.
ProForce Debris Blower
This page is intentionally blank.

PRELIMINARY – For Toro Distributor and Toro Company use only.
ProForce Debris Blower
Table Of Contents
Chapter 1 −Safety
Safety Instructions 1 −2. . . . . . . . . . . . . . . . . . . . . . . . . .
Safety and Instruction Decals 1 −4. . . . . . . . . . . . . . . .
Chapter 2 −Product Records and Maintenance
Product Records 2 −1. . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 2 −1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equivalents and Conversions 2 −2. . . . . . . . . . . . . . . .
Torque Specifications 2 −3. . . . . . . . . . . . . . . . . . . . . . .
Chapter 3 −Engine
Specifications 3 −2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service and Repairs 3 −2. . . . . . . . . . . . . . . . . . . . . . . .
KOHLER ENGINE SERVICE MANUAL
Chapter 4 −Electrical System
Service and Repairs 4 −2. . . . . . . . . . . . . . . . . . . . . . . .
Chapter 5 −Blower Assembly
Service and Repairs 5 −2. . . . . . . . . . . . . . . . . . . . . . . .
Chapter 6 −Chassis
Service and Repairs 6 −2. . . . . . . . . . . . . . . . . . . . . . . .
Chapter 7 −Electrical Diagrams
Electrical Schematic 7 −3. . . . . . . . . . . . . . . . . . . . . . . .
Harness Drawings 7 −3. . . . . . . . . . . . . . . . . . . . . . . . . .
SafetyProduct Records
and Maintenance
EngineElectricalBlower
System
Chassis
Assembly
Electrical
Diagrams

PRELIMINARY – For Toro Distributor and Toro Company use only.
ProForce Debris Blower
This page is intentionally blank.

PRELIMINARY – For Toro Distributor and Toro Company use only.
ProForce Debris Blower Page 1 −1 Safety
Chapter 1
Safety
Table of Contents
SAFETY INSTRUCTIONS 2. . . . . . . . . . . . . . . . . . . . . .
Before Operating 2. . . . . . . . . . . . . . . . . . . . . . . . . . . .
While Operating 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance and Service 4. . . . . . . . . . . . . . . . . . . .
SECURING PROFORCE DEBRIS BLOWER TO
TOW VEHICLE 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
JACKING INSTRUCTIONS 5. . . . . . . . . . . . . . . . . . . . .
SAFETY AND INSTRUCTION DECALS 6. . . . . . . . . .
Safety

PRELIMINARY – For Toro Distributor and Toro Company use only.
ProForce Debris BlowerPage 1 −2Safety
Safety Instructions
The ProForce Debris Blower is designed and tested to
offer safe service when operated and maintained prop-
erly. Although hazard control and accident prevention
partially are dependent upon the design and configura-
tion of the machine, these factors are also dependent
upon the awareness, concern and proper training of the
personnel involved in the operation, transport, mainte-
nance and storage of the machine. Improper use or
maintenance of the machine can result in injury or
death. To reduce the potential for injury or death, comply
with the following safety instructions.
WARNING
To reduce the potential for injury or death, com-
ply with the following safety instructions.
Before Operating
1. Read and understand the contents of the Operator’s
Manual before starting and operating the ProForce De-
bris Blower. Become familiar with the controls and know
how to stop the machine quickly. A replacement Opera-
tor’s Manual is available on the Internet at www.To-
ro.com or by sending the complete model and serial
number to:
The Toro Company
Attn. Technical Publications
8111 Lyndale Avenue South
Bloomington, Minnesota 55420−1196
2. Keep all shields, safety devices and decals in place.
If a shield, safety device or decal is defective, illegible
or damaged, repair or replace it before operating the
machine.
3. Make sure that the tow vehicle is carefully selected
to assure the best performance and safe operation of
the ProForce Debris Blower.
4. Make sure that operator is familiar with safe tow ve-
hicle operation.
5. Tighten any loose nuts, bolts, screws or other fasten-
ers to ensure machine is in safe operating condition.
6. Make sure that the ProForce Debris Blower is prop-
erly attached to tow vehicle.

PRELIMINARY – For Toro Distributor and Toro Company use only.
ProForce Debris Blower Page 1 −3 Safety
While Operating
1. Operator should be on the tow vehicle when starting
the engine and when operating the ProForce Debris
Blower. Stay away from the blower when it is engaged.
2. Before starting the engine on the tow vehicle, refer
to tow vehicle Operator’s Manual for safe starting proce-
dures.
3. Do not run engine of ProForce Debris Blower or tow
vehicle in a confined area without adequate ventilation.
Exhaust fumes are hazardous and could possibly be
deadly.
4. Be aware of the blower nozzle direction and do not
point it at anyone. Keep away from the nozzle opening
during machine operation.
5. Do not touch engine or exhaust system while the De-
bris Blower engine is running or soon after it is stopped.
These areas could be hot enough to cause burns.
6. If abnormal vibration is detected, shut off blower and
stop tow vehicle immediately. Determine source of
vibration and correct problem(s) before resuming the
use of blower.
7. While operating, the combination of the tow vehicle
and the ProForce Debris Blower may exceed noise lev-
els of 85dB(A) at the operator position. Hearing protec-
tion is recommended for prolonged exposure to reduce
the potential of permanent hearing damage.
8. Before leaving the operator’s position of the tow ve-
hicle:
A. Park on level surface and stop ProForce Debris
Blower engine. Make sure that all machine motion
has stopped.
B. Ensure that tow vehicle transmission or traction
lever is in neutral, set parking brake, stop engine and
remove key from ignition switch.
C. Wait for all moving parts to stop before leaving
the tow vehicle.
D. If blower use is complete, turn ProForce Debris
Blower ignition switch OFF and remove key from
switch.

PRELIMINARY – For Toro Distributor and Toro Company use only.
ProForce Debris BlowerPage 1 −4Safety
Maintenance and Service
1. Before servicing or making adjustments to ProForce
Debris Blower, position ProForce Debris Blower on a
level surface and stop blower engine. If blower is at-
tached to tow vehicle, apply tow vehicle parking brake,
stop engine and remove key from the ignition switch.
Also, turn blower ignition switch OFF and remove key
from switch.
2. To prevent unexpected machine operation, discon-
nect battery before performing any Debris Blower ser-
vice. Disconnect negative battery cable first and
positive cable last. If battery voltage is required for trou-
bleshooting or test procedures, temporarily connect the
battery. Reconnect positive battery cable first and nega-
tive cable last.
3. Make sure machine is in safe operating condition by
keeping all nuts, bolts, screws and other fasteners tight.
4. Use care when checking or servicing the blower:
wear gloves and use caution.
5. Before disconnecting ProForce Debris Blower from
tow vehicle, park blower on a hard, level surface and
chock blower wheels to prevent machine movement.
6. To reduce potential fire hazard, keep engine area
free of excessive grease, grass, leaves and dirt.
7. If engine must be running to perform maintenance or
to make an adjustment, keep hands, feet, clothing and
other parts of the body away from moving parts on the
Debris Blower. Keep bystanders away.
8. Do not overspeed the engine by changing governor
setting. To assure safety and accuracy, check maximum
engine speed with a tachometer.
9. Shut Debris Blower engine off before checking or
adding oil to the crankcase.
10.Battery acid is poisonous and can cause burns.
Avoid contact with skin, eyes and clothing. Protect your
face, eyes and clothing when working with a battery.
11. Battery gases can explode. Keep cigarettes, sparks
and flames away from the battery.
12.After servicing the ProForce Debris Blower, be sure
that all guards and covers are properly installed.
13.When changing tires or performing other service,
use correct supports, hoists and jacks. Make sure ma-
chine is parked on a solid level surface such as a con-
crete floor. Always chock or block wheels. Use suitable
jack stands to support the raised machine. If the ma-
chine is not properly supported by suitable jack stands,
the machine may move or fall, which may result in per-
sonal injury (see Jacking Instructions in this chapter).
14.If welding on the machine is necessary, disconnect
the negative battery cable to prevent electrical system
damage.
15.If major repairs are ever needed or assistance is de-
sired, contact an Authorized Toro Distributor.
16.At the time of manufacture, the machine conformed
to all applicable safety standards. To assure optimum
performance and continued safety certification of the
machine, use genuine Toro replacement parts and ac-
cessories. Replacement parts and accessories made
by other manufacturers may result in non-conformance
with the safety standards, and the warranty may be
voided.

PRELIMINARY – For Toro Distributor and Toro Company use only.
ProForce Debris Blower Page 1 −5 Safety
Securing ProForce Debris Blower to Tow Vehicle
While operating or servicing the ProForce Debris Blow-
er, make sure that blower is properly secured to tow ve-
hicle (Fig. 1). Refer to your Operator’s Manual for the
correct procedure for attaching blower to tow vehicle.
1. Tow vehicle hitch
2. Hitch pin
3. Hairpin clip
Figure 1
3
2
1
Jacking Instructions
CAUTION
When changing tires or performing other ser-
vice, use suitable hoists and jacks to support
the ProForce Debris Blower. Make sure ma-
chine is parked on a solid level surface such as
a concrete floor. Always chock or block wheels.
Use suitable jack stands to support the raised
machine. If the machine is not properly sup-
ported by jack stands, the machine may move
or fall, which may result in personal injury.
1. Position ProForce Debris Blower on a level surface
with blower attached to tow vehicle. Engage tow vehicle
parking brake, stop engine and remove key from the
ignition switch. Make sure that blower engine is off.
Chock blower wheels to prevent the machine from mo-
ving.
2. Position jack securely under the main frame of the
blower (Fig. 2). Do not use the axle as a jacking point.
3. Carefully jack machine off the ground.
4. Position jack stands under the main frame to support
the ProForce Debris Blower.
1. Wheel 2. Frame jacking point
Figure 2
2
1

PRELIMINARY – For Toro Distributor and Toro Company use only.
ProForce Debris BlowerPage 1 −6Safety
Safety and Instruction Decals
Numerous safety and instruction decals are affixed to
the ProForce Debris Blower. If any decal becomes illeg-
ible or damaged, install a new decal. Part numbers for
replacement decals are listed in your Parts Catalog. Or-
der replacement decals from your Authorized Toro Dis-
tributor.

PRELIMINARY – For Toro Distributor and Toro Company use only.
ProForce Debris Blower Page 2 −1 Product Records and Maintenance
Chapter 2
Product Records and Maintenance
Table of Contents
PRODUCT RECORDS 1. . . . . . . . . . . . . . . . . . . . . . . . .
MAINTENANCE 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EQUIVALENTS AND CONVERSIONS 2. . . . . . . . . . .
Decimal and Millimeter Equivalents 2. . . . . . . . . . . .
U.S. to Metric Conversions 2. . . . . . . . . . . . . . . . . . .
TORQUE SPECIFICATIONS 3. . . . . . . . . . . . . . . . . . .
Fastener Identification 3. . . . . . . . . . . . . . . . . . . . . . .
Standard Torque for Dry, Zinc Plated and
Steel Fasteners (Inch Series) 4. . . . . . . . . . . . . . .
Standard Torque for Dry, Zinc Plated and
Steel Fasteners (Metric Fasteners) 5. . . . . . . . . .
Other Torque Specifications 6. . . . . . . . . . . . . . . . . .
Conversion Factors 6. . . . . . . . . . . . . . . . . . . . . . . . .
Product Records
Insert Operator’s Manual and Parts Catalog for your
ProForce Debris Blower at the end of this chapter. Addi-
tionally, if any optional equipment or accessories have
been installed to your blower, insert the Installation In-
structions, Operator’s Manuals and Parts Catalogs for
those options at the end of this chapter.
Maintenance
Maintenance procedures and recommended service in-
tervals for the ProForce Debris Blower are covered in
the Operator’s Manual. Refer to that publication when
performing regular equipment maintenance.
Product Records
and Maintenance

PRELIMINARY – For Toro Distributor and Toro Company use only.
0.09375
ProForce Debris BlowerPage 2 −2Product Records and Maintenance
Equivalents and Conversions

PRELIMINARY – For Toro Distributor and Toro Company use only.
ProForce Debris Blower Page 2 −3 Product Records and Maintenance
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 spe-
cified in this 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 this Ser-
vice Manual. The following factors shall be considered
when applying torque: cleanliness of the fastener, use
of a thread sealant (e.g. Loctite), degree of lubrication
on the fastener, presence of a prevailing torque feature,
hardness of the surface underneath 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 en-
gagement, etc.
The standard method of verifying torque shall be per-
formed 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.
Fastener Identification
Figure 1
Grade 1 Grade 5 Grade 8
Inch Series Bolts and Screws
Figure 2
Class 8.8 Class 10.9
Metric Bolts and Screws

PRELIMINARY – For Toro Distributor and Toro Company use only.
ProForce Debris BlowerPage 2 −4Product Records and Maintenance
Standard Torque for Dry, Zinc Plated and Steel Fasteners (Inch Series)
Thread Size
Grade 1, 5 &
8 with Thin
Height Nuts
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)
SAE Grade 8 Bolts, Screws, Studs &
Sems with Regular Height Nuts
(SAE J995 Grade 5 or Stronger Nuts)
in−lb in−lb N−cm in−lb N−cm in−lb N−cm
# 6 −32 UNC
10 + 2
13 + 2
147 + 23
15 + 2 170 + 20 23 + 2 260 + 20
# 6 −40 UNF
10 + 2 13 + 2 147 + 23
17 + 2 190 + 20 25 + 2 280 + 20
# 8 −32 UNC
13 + 2
25 + 5
282 + 30
29 + 3 330 + 30 41 + 4 460 + 45
# 8 −36 UNF
13 + 2 25 + 5 282 + 30
31 + 3 350 + 30 43 + 4 485 + 45
# 10 −24 UNC
18 + 2
30 + 5
339 + 56
42 + 4 475 + 45 60 + 6 675 + 70
# 10 −32 UNF
18 + 2 30 + 5 339 + 56
48 + 4 540 + 45 68 + 6 765 + 70
1/4 −20 UNC 48 + 7 53 + 7 599 + 79 100 + 10 1125 + 100 140 + 15 1580 + 170
1/4 −28 UNF 53 + 7 65 + 10 734 + 113 115 + 10 1300 + 100 160 + 15 1800 + 170
5/16 −18 UNC 115 + 15 105 + 17 1186 + 169 200 + 25 2250 + 280 300 + 30 3390 + 340
5/16 −24 UNF 138 + 17 128 + 17 1446 + 192 225 + 25 2540 + 280 325 + 30 3670 + 340
ft−lb ft−lb N−m ft−lb N−m ft−lb N−m
3/8 −16 UNC 16 + 2 16 + 2 22 + 3 30 + 3 41 + 4 43 + 4 58 + 5
3/8 −24 UNF 17 + 2 18 + 2 24 + 3 35 + 3 47 + 4 50 + 4 68 + 5
7/16 −14 UNC 27 + 3 27 + 3 37 + 4 50 + 5 68 + 7 70 + 7 95 + 9
7/16 −20 UNF 29 + 3 29 + 3 39 + 4 55 + 5 75 + 7 77 + 7 104 + 9
1/2 −13 UNC 30 + 3 48 + 7 65 + 9 75 + 8 102 + 11 105 + 10 142 + 14
1/2 −20 UNF 32 + 3 53 + 7 72 + 9 85 + 8 115 + 11 120 + 10 163 + 14
5/8 −11 UNC 65 + 10 88 + 12 119 + 16 150 + 15 203 + 20 210 + 20 285 + 27
5/8 −18 UNF 75 + 10 95 + 15 129 + 20 170 + 15 230 + 20 240 + 20 325 + 27
3/4 −10 UNC 93 + 12 140 + 20 190 + 27 265 + 25 359 + 34 375 + 35 508 + 47
3/4 −16 UNF 115 + 15 165 + 25 224 + 34 300 + 25 407 + 34 420 + 35 569 + 47
7/8 −9 UNC 140 + 20 225 + 25 305 + 34 430 + 45 583 + 61 600 + 60 813 + 81
7/8 −14 UNF 155 + 25 260 + 30 353 + 41 475 + 45 644 + 61 660 + 60 895 + 81
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: 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.
NOTE: The nominal torque values listed above for
Grade 5 and 8 fasteners are based on 75% of the mini-
mum proof load specified in SAE J429. The tolerance is
approximately + 10% of the nominal torque value. Thin
height nuts include jam nuts.

PRELIMINARY – For Toro Distributor and Toro Company use only.
ProForce Debris Blower Page 2 −5 Product Records and Maintenance
Standard Torque for Dry, Zinc Plated and Steel Fasteners (Metric Fasteners)
Thread Size
Class 8.8 Bolts, Screws and Studs with
Regular Height Nuts
Class 10.9 Bolts, Screws and Studs with
Regular Height Nuts
Thread Size Regular Height Nuts
(Class 8 or Stronger Nuts)
Regular Height Nuts
(Class 10 or Stronger Nuts)
M5 X 0.8 57 + 5 in−lb 640 + 60 N−cm 78 + 7 in−lb 885 + 80 N−cm
M6 X 1.0 96 + 9 in−lb 1018 + 100 N−cm 133 + 13 in−lb 1500 + 150 N−cm
M8 X 1.25 19 + 2 ft−lb 26 + 3 N−m27 + 2 ft−lb 36 + 3 N−m
M10 X 1.5 38 + 4 ft−lb 52 + 5 N−m53 + 5 ft−lb 72 + 7 N−m
M12 X 1.75 66 + 7 ft−lb 90 + 10 N−m 92 +9 ft−lb 125 +12 N−m
M16 X 2.0 166 +15 ft−lb 225 + 20 N−m229 + 22 ft−lb 310 + 30 N−m
M20 X 2.5 325 + 33 ft−lb 440 + 45 N−m450 + 37 ft−lb 610 + 50 N−m
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: 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.
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.

PRELIMINARY – For Toro Distributor and Toro Company use only.
ProForce Debris BlowerPage 2 −6Product Records and Maintenance
Other Torque Specifications
SAE Grade 8 Steel Set Screws
Thread Size
Recommended Torque
Thread Size
Square Head Hex Socket
1/4 −20 UNC 140 + 20 in−lb 73 + 12 in−lb
5/16 −18 UNC 215 + 35 in−lb 145 + 20 in−lb
3/8 −16 UNC 35 + 10 ft−lb 18 + 3 ft−lb
1/2 −13 UNC 75 + 15 ft−lb 50 + 10 ft−lb
Thread Cutting Screws
(Zinc Plated Steel)
Type 1, Type 23 or Type F
Thread Size Baseline Torque*
No. 6 −32 UNC 20 + 5 in−lb
No. 8 −32 UNC 30 + 5 in−lb
No. 10 −24 UNC 38 + 7 in−lb
1/4 −20 UNC 85 + 15 in−lb
5/16 −18 UNC 110 + 20 in−lb
3/8 −16 UNC 200 + 100 in−lb
Wheel Bolts and Lug Nuts
Thread Size Recommended Torque**
7/16 −20 UNF
Grade 5
65 + 10 ft−lb 88 + 14 N−m
1/2 −20 UNF
Grade 5
80 + 10 ft−lb 108 + 14 N−m
M12 X 1.25
Class 8.8
80 + 10 ft−lb 108 + 14 N−m
M12 X 1.5
Class 8.8
80 + 10 ft−lb 108 + 14 N−m
** For steel wheels and non−lubricated fasteners.
Thread Cutting Screws
(Zinc Plated Steel)
Thread
Size
Threads per Inch
Baseline Torque*
Size
Type A Type B
Baseline Torque*
No. 6 18 20 20 + 5 in−lb
No. 8 15 18 30 + 5 in−lb
No. 10 12 16 38 + 7 in−lb
No. 12 11 14 85 + 15 in−lb
* Hole size, material strength, material thickness & finish
must be considered when determining specific torque
values. All torque values are based on non−lubricated
fasteners.
Conversion Factors
in−lb X 11.2985 = N−cm N−cm X 0.08851 = in−lb
ft−lb X 1.3558 = N−mN−m X 0.7376 = ft−lb

PRELIMINARY – For Toro Distributor and Toro Company use only.
ProForce Debris Blower Page 3 −1 Engine
Chapter 3
Engine
Table of Contents
SPECIFICATIONS 2. . . . . . . . . . . . . . . . . . . . . . . . . . . .
GENERAL INFORMATION 3. . . . . . . . . . . . . . . . . . . . .
Operator’s Manual 3. . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Power 3. . . . . . . . . . . . . . . . . . . . . . . . . . . .
SERVICE AND REPAIRS 5. . . . . . . . . . . . . . . . . . . . . .
Cooling System 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel Tank 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Removal 9. . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Installation 10. . . . . . . . . . . . . . . . . . . . . . . .
KOHLER ENGINE SERVICE MANUAL
Engine

PRELIMINARY – For Toro Distributor and Toro Company use only.
ProForce Debris BlowerPage 3 −2Engine
Specifications
Item Description
Make / Designation Kohler, 4−cycle, V−Twin cylinder,
OHV, air cooled, Model CH740S
Bore x Stroke 3.27 in x 2.64 in (83 mm x 67 mm)
Total Displacement 44 in3(725 cc)
Compression Ratio 9.0:1
Governor Electronic
Low Idle Speed (no load) 1800 + 100 RPM
High Idle Speed (no load) 3450 + 100 RPM
Carburetor Float feed, fixed main jet, solenoid fuel shut−off
Fuel Unleaded, regular grade gasoline
Fuel Pump Mechanical
Fuel Tank Capacity 5 U.S. gal (18.9 l)
Air Cleaner Dual element
Lubrication System Pressure lubrication with oil cooler
Crankcase Oil Capacity 2.0 U.S. qt (1.9 l)
Engine Oil See Operator’s Manual
Ignition System Flywheel magneto, twin electronic armatures with ignition advance
Spark Plug Champion RC12YC (resister style)
Spark Plug Gap 0.030 in (0.76 mm)
Starter 12 VDC, solenoid shift
Alternator 12 VDC / 15 Amps
Dry Weight 94 lbs (43 kg)

PRELIMINARY – For Toro Distributor and Toro Company use only.
ProForce Debris Blower Page 3 −3 Engine
General Information
This Chapter gives information about specifications,
maintenance, troubleshooting, testing and repair of the
gasoline engine used in the ProForce Debris Blower.
Most repairs and adjustments require tools which are
commonly available in many service shops. Special
tools are described in the KOHLER ENGINE SERVICE
MANUAL that is included at the end of this Chapter. The
use of some specialized test equipment is explained.
However, the cost of the test equipment and the special-
ized nature of some repairs may dictate that the work be
done at an engine repair facility.
Service and repair parts for Kohler engines are supplied
through your local Toro distributor. Be prepared to pro-
vide your distributor with the Toro model and serial num-
ber.
Operator’s Manual
The Operator’s Manual provides information regarding
the operation, general maintenance and maintenance
intervals for your ProForce Debris Blower machine. Re-
fer to the Operator’s Manual for additional information
when servicing the machine.
Electrical Power
Electrical power to ProForce Debris Blower compo-
nents is controlled by the Remote Control Module. To
make sure that machine operation does not occur unex-
pectedly, disconnect the negative battery cable from the
battery before performing any machine service.
Reattach the disconnected negative battery cable as
the last step in any repair. Secure cable with flange nut.
Torque nut from from 10 to 15 ft−lb (14 to 20 N−m).

PRELIMINARY – For Toro Distributor and Toro Company use only.
ProForce Debris BlowerPage 3 −4Engine
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