Checking The Tire Pressure; Checking Systems Operation; Checking Cutting Unit Mismatch; Adjusting The Height Of Cut - Toro 30581 Groundsmaster 580-D Operator's Manual

2. Fill tank to about 1 in. (25 mm) below bottom of filler
neck with No. 2 diesel fuel. Install cap.
Figure 7
1. Fuel tank cap

Checking the Tire Pressure

Since the machine can be operated under many different
types of turf conditions, proper tire pressure is very
important. Use the following as a guide:
Under Normal mowing conditions and when used on a
wide variety of turf grasses: 15 psi (103.4 kPa) front; 13
psi (89.6 kPa) rear. 50 psi (344.7 kPa) castors.
When turf is wet and softer than normal, use low
pressure: 12 psi (82.7 kPa) front and 9 psi (62 kPa) rear.
When turf is dry and harder than normal, use higher tire
pressure: 18 psi (124 kPa) front and rear.
Important Do not operate in HIGH RANGE for
extended periods when tire pressure is less than 18 psi
because tires may be damaged. When tire pressure exceeds
18 psi, HIGH RANGE may be used.

Checking Systems Operation

Start engine. Move the machine, slowly, to an area where
the machine can be checked for proper function. Check
operation of controls, safety interlock system, engine,
hydraulic system, brakes and cutting units; refer to
Operation, page 20, for proper procedures.
Checking Cutting Unit
Mismatch
To ensure all cutting units are at the same height-of-cut:
1. Adjust all cutting units to the highest height–of–cut.
Position all castor arm height-of-cut spacers to on the
underside of the castor arms. Do not move washers.
Leave them in their original position.
Note: Unless all castor wheel axles are not in the same
location, axles do not have to be relocated. All, however
must be in the same holes (Fig. 8).
2. Place a flat 4'x8' sheet of 3/4 in. plywood on a level
surface and lower a cutting unit onto the plywood.
3. Taking each cutting blade in turn, position blade so it
faces fore and aft. Measure from plywood to front tip of
cutter blade and record dimension. All blade heights on
same deck should be within 1/4 in. (6.3 mm) of one
another. If blade heights meet criteria, proceed to step 5.
If blade heights are not within 1/4 in. (6.3 mm), proceed
to step 4.
4. To match cutting blade height, transfer washers from
one side of a castor wheel arm to the other. If end is to
be lowered, transfer one or both washers from the
underside to the top. By contrast, if end is to be raised,
transfer washer(s) from the top to the underside. Each
washer is 1/8 in. (3 mm) thick. Repeat measurement of
blade tip height and record new dimensions.
5. Repeat steps 2–3 on remaining cutting units, and step 4,
if necessary. If washers are transferred on a outboard
cutting unit castor arm, be sure to transfer the same
number on both ends of the castor arm.
6. Compare blade height dimensions of all cutting units.
Blade heights must be within 3/8 in. (9.5 mm) of one
another. If they are not, determine which cutting unit
height can be changed to compensate for difference and
either transfer washers from bottom to top to lower unit,
or from top to bottom to raise. Transfer an equal
number of washers at all castor wheel locations to keep
cutting unit level—two on front unit, four on outboard
units.

Adjusting the Height of Cut

The height-of-cut is adjustable from 1 to 5-1/2 in. (25 to
140 mm) in 1/2 in. (13 mm) increments. Positioning the
castor wheel axles in the top holes of the castor forks
(Fig. 8) allows Low range height-of-cut settings from 1 to
4 in. (25 to 102 mm); positioning the castor wheel axles in
the lower holes of the castor forks (Fig. 8) allows High
range height-of-cut settings from 2-1/2 to 5-1/2 in. (63.5 to
140 mm).
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