Drive System Maintenance; Adjusting The Tracking; Checking The Tire Pressure; Checking The Wheel Hub Slotted Nut - Toro 74448 Operator's Manual

Drive System
Maintenance

Adjusting the Tracking

Note: Determine the left and right sides of the machine
from the normal operating position.
The machine has a knob for adjusting the tracking
located under the seat.
Important: Adjust the handle neutral and hydraulic
pump neutral before adjusting the tracking. Refer
to Adjusting the Handle Neutral in Controls System
Maintenance , page 38 and Adjusting the Hydraulic
Pump Neutral in Hydraulic System Maintenance ,
page 39.
1. Push both control levers forward the same distance.
2. Check if the machine pulls to one side. If it does,
stop the machine and set the parking brake.
3. Unlatch the seat and tilt the seat forward to access
the tracking knob.
4. To make the machine go right, turn the knob towards
the right-side of the machine. Refer to Figure 38.
5. To make the machine go left, turn the knob towards
the left-side of the machine. Refer to Figure 38.
6. Repeat adjustment until the tracking is correct.
Figure 38
1. Pump rod
2. Turn this way to track left

Checking the Tire Pressure

Service Interval: Every 50 hours/Monthly (whichever
comes first)
3. Tracking knob
4. Turn this way to track right
Check the pressure at the valve stem (Figure 39).
Maintain the air pressure in the front and rear tires at
13 psi (90 kPa). Uneven tire pressure can cause uneven
cut. Check the tires when they are cold to get the most
accurate pressure reading.
Checking the Wheel Hub
Slotted Nut
Service Interval: Every 100 hours
The slotted nut needs to be torqued to 125 ft-lb
(170 N•m).
1. Disengage the PTO, move the motion control levers
to the neutral locked position and set the parking
brake.
2. Stop the engine, remove the key, and wait for all
moving parts to stop before leaving the operating
position.
3. Remove the cotter pin.
4. Torque the slotted nut to 125 ft-lb (170 N•m)
(Figure 40).
33
Figure 39