Drive System Maintenance; Adjusting The Tracking; Checking The Tire Pressure; Checking The Wheel-Lug Nuts - Toro 74312 Operator's Manual

Drive System
Maintenance

Adjusting the Tracking

Note:
The tracking knob is located under the seat.
Note:
Rotating this knob allows fine tuning
adjustments so that the machine tracks straight with
the drive levers in the full forward position.
1. Run the machine at 3/4 speed for at least 5
minutes to bring hydraulic fluid up to operating
temperature. Stop machine and wait for all
moving parts to stop.
2. Engage the parking brake.
3. Tilt the seat forward to gain access to the
tracking knob.
4. Rotate the knob toward the right to steer right
and rotate it toward the left to steer left.
5. Adjust in 1/8 turn increments until the machine
tracks straight.
6. Check and ensure that the machine does not
creep when in neutral with the parking brakes
disengaged (Figure
Figure 42
1. Tracking knob

Checking the Tire Pressure

Service Interval: Every 40 hours
Maintain the air pressure in the rear tires at 103 kPa
(15 psi). Uneven tire pressure can cause uneven cut.
Check the tires when they are cold, to get the most
accurate pressure reading.
42).
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Note:
The front tires are semi-pneumatic tires and
does not require air pressure maintenance.
Note:
Do not add any type of tire liner or foam fill
material to the tires.
Checking the Wheel-Lug
Nuts
Service Interval: After the first 100 hours
Every 500 hours
Check and torque the wheel-lug nuts to 122 to 129
N∙m (90 to 95 ft-lb).
Checking the Wheel-Hub
Nuts
Service Interval: After the first 100 hours
Every 500 hours
Check and ensure that the torque of the slotted nut is
373 to 475 N∙m (275 to 350 ft-lb).
Adjusting the Caster-Pivot
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Bearings
Service Interval: Every 500 hours/Yearly (whichever
1. Move the speed-control lever to the N
position to stop the machine.
2. Disengage the PTO, engage the parking brake,
shut off the engine, and wait for all moving parts
to stop.
3. Remove the dust cap from the caster and tighten
the locknut
43
Figure 43
comes first)
(Figure 44 and Figure
g001055
EUTRAL
45).