Toro GROUNDSMASTER 30753 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. 3322–201
GROUNDSMASTER
52” Mower
for 120 T raction Unit
Model No. 30753 – 990001 & UP

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 .
1m–3142
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 the Castor Wheels 4 . . . . . . . . . . .
Installing the Carrier Frame to the
Traction Unit 4
. . . . . . . . . . . . . . . . . . . . . .
Installing the Cutting Mower 5 . . . . . . . . . . .
Installing the Drive Belt 5 . . . . . . . . . . . . . . .
Operation 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating the Power Take Off (PTO) 6 . . . .
Implement Lift Lever 7 . . . . . . . . . . . . . . . . .
Adjusting Gage Wheels 7 . . . . . . . . . . . . . . .
Page
Maintenance 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Interval Chart 8 . . . . . . . . . . . . . . . .
Cutting Blades 8 . . . . . . . . . . . . . . . . . . . . . .
Correcting Cutting Unit Mismatch 11 . . . . . .
Setting the Front-to-Rear Pitch 11 . . . . . . . . .
Setting the Side-to-Side Leveling 12 . . . . . . .
Greasing and Lubrication 13 . . . . . . . . . . . . . .
Replacing the Mower Belt 14 . . . . . . . . . . . . .
Replacing the Drive Belt 15 . . . . . . . . . . . . . .
Replacing the Grass Deflector 15 . . . . . . . . . .
Replacing the Castor Wheel Fork Bushings 16
Servicing the Castor Wheels and Bearings 17
Storage 18 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 19 . . . . . . . . . . . . . . . . . . . . . . . . .

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.
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!  
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! 
$,- + 
    
"
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
      !  !
   # !
      
    
  
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$,- + . &'- *%&
$,- + . *()- *%&
     "
$,- + .

3
Assembly
Loose Parts
Note: Use the chart below to identify parts used for assembly.
DESCRIPTION QTY. USE
Carrier frame
Shim
Bolt 3/8–16 x 7/8” (22 mm)
Washer 3/8” (10 mm)
Bolt 3/8–16 x 1-3/4” (44 mm)
Locknut 3/8–16
1
2
4
4
4
4
Install carrier frame to traction unit
Castor wheel assembly
Thrust washer
Retaining pin
2
8
2
Install castor wheels to carrier frame
Drive belt
Clevis pin
Hairpin cotter
1
4
4
Install cutting unit to carrier frame
Operator’ s Manual
Parts Catalog
1
1
Read before operating
Ordering parts

Assembly
4
Installing the Castor Wheels
1. Place the (2) thrust washers onto the castor
wheel fork (Fig. 1).
2. Insert the castor wheel fork into the carrier frame
mounting tube (Fig. 1).
3. Install (2) thrust washer onto the castor wheel
fork, then secure with a retaining ring (Fig. 1).

3
2
2
1
4
Figure 1
1. Retaining ring
2. Thrust washer (4)
3. Carrier frame mounting
tube
4.
Castor wheel fork
4. Set the castor wheel tire pressure to 25–30 psi
(172–207 kPa).
Installing the Carrier Frame to
the T raction Unit
1. Align the carrier frame and shim holes with the
mounting holes in the traction unit frame
(Fig. 2).
2. Fasten each side of the carrier frame to the
traction unit with (2) 3/8-16 x 7/8” (22 mm)
bolts and washers, down from the top, and (2)
3/8-19 x 1-3/4” (44 mm) bolts and 3/8-16
locknuts, through the side (Fig. 2).
3. Torque the mounting screws to 240-320 in-lb
(27–36 Nm) (Fig. 2).
2
3

1
4
7
7
5
Figure 2
1. Carrier frame
2. Shim
3. T
raction unit frame
4. Bolt 3/8-16 x 7/8 (22 mm)
5. W asher 3/8” (10 mm)
6. Bolt 3/8-16 x 1-3/4”
(44 mm)
7. Locknut 3/8-16

Assembly
5
Installing the Cutting Mower
1. Position mower under the carrier frame.
2. Mount the mower to the carrier frame with four
(4) clevis pins and hairpin cotters (Fig. 3).
Note: All four pins must be in the same hole
locations to prevent uneven cutting.
8
11
1
3
5
7
2
4
6

9
10
Figure 3
1. 1” (25 mm) Cut height
2. 1-1/2” (39 mm) Cut height
3. 2” (51 mm) Cut height
4. 2-1/2” (64 mm) Cut height
5. 3” (76 mm) Cut height
6. 3-1/2” (89 mm) Cut height
7. 4” (102 mm) Cut height
8. Clevis pin
9. Carrier frame
10. Mower
11.
Hairpin cotter
Installing the Drive Belt
1. Release latches holding covers to the top of the
mower, over gearbox pulley, and remove.
2. Install the drive belt around the jackshaft pulley,
on the traction unit, and the gearbox pulley.
Raise the idler pulley and position over the
upper portion of the drive belt (Fig. 4).
3. Install mower covers and secure latches.
1
2
34

Figure 4
1. Jackshaft pulley
2. Gearbox pulley
3. Drive belt
4. Idler pulley
POTENTIAL HAZARD
•When the mower is attached to the traction
unit, without additional weight, the traction
unit may become unstable.
WHAT CAN HAPPEN
•Loss of traction and stability may cause
loss of control.
HOW TO AV
OID THE HAZARD
•NEVER operate the traction unit with
mower attached, unless rear weight is
installed.

6
Operation
POTENTIAL HAZARD
•When the mower is attached to the traction
unit, without additional weight, the traction
unit may become unstable.
WHAT CAN HAPPEN
•Loss of traction and stability may cause
loss of control.
HOW TO AV
OID THE HAZARD
•NEVER operate the traction unit with
mower attached, unless rear weight is
installed.
Operating the Power T ake Off
(PTO)
The power take off (PTO) switch engages and
disengages power to the electric clutch.
Engaging the PTO
1. Release the parking brake.
2. Release pressure on the traction pedal to stop
movement (Fig. 5).
3. To engage lift cover and move the PTO switch to
the “ON” position (Fig. 5).
Disengaging the PTO
1. Closing the cover moves the PTO switch to the
“OFF”position (Fig. 5).





Figure 5
1. Traction pedal
2. PTO switch
3. Ignition switch
4. Choke
5. Throttle

Operation
7
Implement Lift Lever
The implement lift lever (Fig. 6) is used to raise and
lower various attachments.
Raising Attachments
1. Remove pressure from traction pedal to stop the
machine.
2. Pull implement lift lever (Fig. 6) rearward to
raise attachment to the desired height.
Lowering Attachments
1. Remove pressure from traction pedal to stop the
machine.
2. Push implement lift lever (Fig. 6) forward to
lower attachment.
Note: Hold lift lever in down position 1–2
seconds after attachment in down to
extend lift cylinder allowing
attachment to float with changes in
ground contour.




Figure 6
1. Lift lever
2. Lift–raise 3. Lift–lower
Adjusting Gage Wheels
The gage wheels must be adjusted in the proper hole
location for each height-of-cut position.
1. After adjusting height-of-cut. raise the
attachment lift lever: Refer to Raising
Attachments.
2. Remove hairpin cotter and pin to change hole
location (Fig. 7).
3. Select a hole position so the gage wheel is 3/8”
(9.5 mm) off the ground for the height-of-cut to
be used (Fig. 7).
4. Insert pin and secure with hairpin cotter.
5. Repeat adjustment on other gage wheels.
m–3197
1
2
3
Figure 7
1. Wheel
2. Pin 3. Hair
pin cotter

8
Maintenance
Service Interval Chart
Service Operation
Each
Use 8 Hours 25 Hours 50 Hours Notes
Cutting blades – check X X
Belts – check for wear/cracks X
Blade spindle bearings – grease X
Idler arm – oil X
Castor wheels – grease X
Gearbox – check level of lubricant X
Mower housing – clean X X X
Chipped surfaces – paint X
Cutting Blades
To ensure a superior quality of cut, keep the blades
sharp. For convenient sharpening and replacement,
you may want to keep extra blades on hand.
POTENTIAL HAZARD
•A blade that is worn or damaged could
break apart and pieces could be thrown at
bystanders or at you as you use the mower.
WHAT CAN HAPPEN
•Pieces of blade that may be thrown could
seriously injure or kill you or bystanders.
HOW TO AV
OID THE HAZARD
•Periodically inspect the blade for wear and
damage. Immediately install a new blade if
it is worn or damaged.
Before Inspecting or Servicing the
Blades
Park the machine on a level surface, disengage the
blade control (PTO) and set the parking brake. Turn
the ignition key to “OFF” to stop the engine. Remove
the key and disconnect the spark plug wire(s) from
the spark plug(s).