Cutting Unit Lubrication; Blade Maintenance - Toro 30581 Groundsmaster 580-D Operator's Manual

Checking the Tire Pressure
Since the machine can be operated under many different
types of turf conditions, proper tire pressure is very
important. Check tire condition and pressure daily and use
the following guide to maintain maximum turf conditions:
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) Casters.
When turf is wet and softer than normal, use low tire
pressure: 12 psi (82.7 kPa) front and 9 psi (62 kPa) rear.
When turf is dry and harder than normal, use high
pressure: 18 psi (124 kPa) front and rear.
Important
Do not operate in HIGH RANGE for
extended periods when tire pressure is less than 20 psi
(138 kPa) because tires may be damaged. When tire
pressure exceeds 20 psi (138 kPa), HIGH RANGE may be
used.

Cutting Unit Lubrication

Follow guidelines in the Lubrication Chart to properly
maintain the units. To gain access to the center and inner
spindle shaft fittings on each outboard unit, proceed as
follows:
Note: To grease spindle bearings, apply 2–3 pumps with a
hand grease gun for each spindle.
1. Position machine on level surface, lower cutting units to
shop floor, engage parking brake, shut engine off and
remove key from ignition switch.
2. Remove the inner deck pulley cover (Fig. 56).
Figure 56
1. Inner cover
3. Use belt to rotate inner and center spindle pulleys until
grease fittings can be accessed with a grease gun.
4. Grease fittings and replace cover.

Blade Maintenance

Note: Although not needed for normal maintenance
procedures, the front cutting unit can be pivoted (tilted) to a
fully upright position (Fig. 57). Should you desire to tilt the
cutting unit, proceed as follows:
Figure 57
Tilting the Cutting Unit Upright
1. Position front cutting unit so rear castor wheels just
clear the floor, set parking brake and shut engine off.
2. Remove deck tilt link from tool box under traction unit
floor (Fig. 54) and klik pins from weldments on traction
unit frame and cutting unit lift arm.
3. Remove hairpin cotters and clevis pins from the (2) rear
castor assemblies (Fig. 58). Set the left hand clevis pin
aside and insert the right hand clevis pin into the most
forward holes in the castor wheel arm on the right side
of the unit (Fig. 59). The castor arm and pin should be
resting on top of the unit.
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