Toro Wheel Horse 78345 User manual

Operator’s Manual
IMPORTANT: Read this manual carefully. It contains information about your
safety and the safety of others. Also become familiar with the controls and
their proper use before you operate the product.
FORM NO. 3318–947 Rev A
Wheel Horse

42” Side Discharge
Mower
for
Classic Garden T ractor
Model No. 78345 – 7900001 & Up

The TORO Co. – 1996
Printed in USA
Introduction
We want you to be completely satisfied with your
new product, so feel free to contact your local
Authorized Service Dealer for help with service,
genuine replacement parts, or other information you
may require.
Whenever you contact your Authorized Service
Dealer or the factory, always know the model and
serial numbers of your product. These numbers will
help the Service Dealer or Service Representative
provide exact information about your specific
product. You will find the model and serial number
plate located in a unique place on the product as
shown below .
1
m–2828
1. Model and Serial Number Plate
For your convenience, write the product model and
serial numbers in the space below.
Model No:
Serial No.
The warning system in this manual identifies
potential hazards and has special safety messages that
help you and others avoid personal injury, even death.
DANGER, WARNING and CAUTION are signal
words used to identify the level of hazard. However,
regardless of the hazard, be extremely careful.
DANGER signals an extreme hazard that will cause
serious injury or death if the recommended
precautions are not followed.
WARNING signals a hazard that may cause serious
injury or death if the recommended precautions are
not followed.
CAUTION signals a hazard that may cause minor or
moderate injury if the recommended precautions are
not followed.
Two other words are also used to highlight
information. “Important” calls attention to special
mechanical information and “Note” emphasizes
general information worthy of special attention.
The left and right side of the machine is determined
by sitting on the seat in the normal operator’s
position.

1
Contents
Page
Safety and Instruction Decals 2.
. . . . . . . . . . . . .
Assembly 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loose Parts 3 . . . . . . . . . . . . . . . . . . . . . . . . .
Installing Dischar ge Chute 4 . . . . . . . . . . . . .
Attach Adjustable Link 5 . . . . . . . . . . . . . . .
Installing the Mower 5 . . . . . . . . . . . . . . . . .
Front-to-Rear Blade Slope 8 . . . . . . . . . . . . .
Transport Height Adjustment 9 . . . . . . . . . . .
Removing the Mower 9 . . . . . . . . . . . . . . . . .
Operation 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Side Discharge 11 . . . . . . . . . . . . . . . . . . . . . .
Operating thePower Take Off (PTO) 11 . . . . .
Page
Attachment Lift Lever 12 . . . . . . . . . . . . . . . .
Attachment Power Lift 12 . . . . . . . . . . . . . . . .
Adjusting Height-of-Cut 13 . . . . . . . . . . . . . .
Tips for Mowing Grass 14 . . . . . . . . . . . . . . .
Maintenance 15 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Interval Chart 15 . . . . . . . . . . . . . . . .
Cutting Blade 16 . . . . . . . . . . . . . . . . . . . . . . .
Greasing and Lubrication 18 . . . . . . . . . . . . . .
Blade Drive Belt 18 . . . . . . . . . . . . . . . . . . . . .
Power Take Off (PTO) Belt 19 . . . . . . . . . . . .
Storage 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 21 . . . . . . . . . . . . . . . . . . . . . . . . .

Safety
2
Safety and Instruction Decals
Safety decals and instructions are easily visible to the operator and are located near
any area of potential danger. Replace any decal that is damaged or lost.
ON GRASS DEFLECT OR
(Part No. 93–1 122)
ON MOWER
LEFT AND RIGHT SIDES
(Part No. 92–7108)
NEXT T O H-O-C LEVER
(Part No. 106748)

3
Assembly
Loose Parts
Note: Use the chart below to identify parts used for assembly.
DESCRIPTION QTY. USE
Grass deflector
T orsion spring
Washer 1/2” (13 mm)
Cotter pin 3/4” (19 mm)
Plastic washer
Rubber bushing
Jam nut 3/8–16
1
1
1
1
2
1
1
Install grass deflector
V belt
Idler assembly
Belt cover
Locknut
1
1
1
1
Install mower to tractor
Operator’ s Manual 1 Read before operating

Assembly
4
POTENTIAL HAZARD
•Without the grass deflector, discharge
cover, or complete grass catcher assembly
mounted in place, you and others are
exposed to blade contact and thrown
debris.
WHAT CAN HAPPEN
•Contact with rotating mower blade(s) and
thrown debris will cause injury or death.
HOW TO AV
OID THE HAZARD
• NEVER r emove the grass deflector from
the mower because the grass deflector
routes material down toward the turf. If the
grass deflector is ever damaged, replace it
immediately.
•Never put your hands or feet under the
mower.
•Never try to clear discharge area or mower
blades unless you move the power take off
(PTO) to “OFF” and rotate the ignition key
to “OFF.” Also remove the key and pull the
wire off the spark plug(s).
Installing Discharge Chute
1. Locate items show (Fig. 1).
2. Place spring short end into small hole in the
discharge chute.
3. Position spring and discharge chute over post on
rear of deck and secure with 1/2” (13 mm)
washer and 3/4” (19 mm) cotter pin (Fig. 1).
4. Slide rubber bushing and plastic washer over
stud at front of mower.
5.
Place dischar ge chute over stud and secure with
second plastic washer and 3/8” jam nut (Fig. 1).
1
3
2
5
4
6

7
Figure 1
1. Discharge chute
2. Spring
3.
Cotter pin 3/4” (19 mm)
4. W asher 1/2” (13 mm)
5. Rubber bushing
6. Plastic washer
7. Jam nut 3/8”
IMPORTANT: Discharge chute must be
spring loaded in the down position. Lift chute
up to test that it snaps to the full down
position.

Assembly
5
Attach Adjustable Link
1. Place adjustable link trunnion into rear wheel
shaft bracket and secure with hairpin cotter
(Fig. 2).
m–3467
1
2
Figure 2
1. Adjustable link trunnion 2. Hairpin cotter
Installing the Mower
1. Park the machine on a level surface, disengage
the power take off (PTO), set the parking brake,
and turn the ignition key to “OFF” to stop the
engine. Remove the key.
2. Turn the front wheels fully to the left and raise
attachment lift lever all the way to the latched
position; refer to tractor Operator’
s Manual.
3. Open front and mid-mount hitches by pushing
release button and moving lock handles forward
(Fig. 3).
1
4
2
3
m–2312
3
4
Figure 3
1. Front hitch
2. Mid-mount hitch
3. Release button
4. Lock handle

Assembly
6
4. Slide the mower under the chassis from the right
side and align attachment lift with slot in center
lever bar (Fig. 4).
5. Straighten the front wheels, turn Dial-A-Height
knob counterclockwise, all the way, and lower
the attachment lift lever to the mounting
position; refer to tractor Operator’
s Manual.
6. Place attachment lift pin into slot in center lever
bar and secure with 3/4” (19 mm) washer and
hairpin cotter (Fig. 4).
1
4
2
3
m–2824
Figure 4
1. Attachment lift
2. Slot-center level bar
3. Washer
4.
Hair pin cotter
7. Rotate front mounting shaft so fork faces up and
align so spacers are between mid-mount hitch
plates (Fig. 5).
8. Lift mower with attachment lift and guide fork
to capture hitch rod (Fig. 5). Close mid-mount
hitch lock handle.
1
4
2
3m–2825
3
5
Figure 5
1. Front mounting shaft
2. Fork
3. Spacer
4.
Mid-mount hitch plate
5. Hitch rod
9. Remove the two wing nuts and belt cover from
the tractor (Fig. 6).
m–25341
2
2
Figure 6
6. Belt cover 7. Wing nut

Assembly
7
10. Remove hairpin cotters from trunnion and
bottom of yoke (Fig. 7).
11. Unlatch and remove locking clevis pin that
secures yoke assembly to clutch shaft. Pivot
yoke out and forward to remove from clutch
shaft and engagement plate (Fig. 7).
12. Place belt in inside pulley groove (Fig. 7).
13. Assemble yoke and engagement plate and attach
locking clevis pin, trunnion and hairpin cotters
to secure (Fig. 7).
m–3443
1
23
4
1
7
6
5
Figure 7
1. Hairpin cotter
2. Trunnion
3.
Engagement plate
4. Locking clevis pin
5. Yoke
6.
Clutch shaft
7. Inside groove
14. Place pulley assembly into front hitch and lock
by moving latch rearward (Fig. 8).
2
1
m–2810
3
Figure 8
1. Pulley assembly
2. Front hitch
3. Latch
15. Route belt around V and flat pulleys and loop
over center mower spindle, top pulley.(Fig. 9).
16. Check that spacer is on shaft and install belt
cover with rod in hole. Secure with locknut
(Fig. 9).
17. Turn knob counterclockwise to tighten belt
(Fig. 9). Tighten until there is 1” (26 mm) belt
movement between engine clutch and idler
pulley when slight pressure is applied to the belt.
21
m–2823
3
7
4
5
6
Figure 9
1. V pulley
2. Flat pulley
3. Upper mower pulley
4. Spacer
5.
Belt cover
6. Locknut
7. Knob
18. Install belt cover (Fig. 6).

Assembly
8
Front-to-Rear Blade Slope
Check the front-to-rear blade slope any time you
install the mower. Before checking the slope, set air
pressure in the front and rear tires to 12 psi (.85 kPa).
If the front blade tip is not 1/8–1/4” (4–7 mm) lower
than the rear blade tip, adjust the blade slope using
the following instructions:
1. Park the machine on a level surface, disengage
the power take off (PTO), set the parking brake,
and turn the ignition key to “OFF” to stop the
engine. Remove the key.
2. Adjust height-of-cut lever on mower to the
middle of the range and lower attachment lift.
3. Carefully rotate blades so they are facing front
and rear (Fig. 10).
4. Measure between the tip of the front blade
(Fig. 10) and the tip of the rear blade to the flat
surface. If the front blade tip is not 1/8–1/4”
(4–7 mm) lower than the rear blade tip adjust
rear adjustment link.
Front 1078
1
2
3
4
4
Figure 10
1. Blade front to rear
2. Measure front blade tip
3. Measure rear blade tip
4. Measure here
5. To adjust front-to rear blade slope turn locknut
on rear adjustable link (Fig. 11).
Note: To raise the front of the mower, turn
locknut clockwise, to lower front turn
counterclockwise.
m–3498
1
2
Figure 1 1
1. Adjustable link 2. Locknut