Drive System Maintenance; Checking The Tire Pressure; Adjusting The Caster Pivot Bearing - Toro 74408 Z334 Z Master Operator's Manual

Drive System
Maintenance

Checking the Tire Pressure

Service Interval: Every 50 hours or monthly, whichever
occurs first.
Check the pressure at the valve stem after every
50 operating hours or monthly, whichever occurs first
(Figure 39).
Maintain the air pressure in the 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.
Note: The front tires are semi-pneumatic tires and do
not require air pressure maintenance.
Figure 39
Adjusting the Caster Pivot
Bearing
Service Interval: Every 500 hours
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 dust cap from caster and tighten lock
nut (Figure 40).
4. Tighten the locknut until the spring washers are flat
and then back off a 1/4 turn to properly set the
pre-load on the bearings (Figure 40).
Important: Make sure spring washers are
installed correctly as shown in Figure 40.
5. Install the dust cap (Figure 40).
1. Spring Washers
2. Lock Nut
33
Figure 40
3. Dust Cap