Adjusting The Caster Pivot; Bearing; Cooling System Maintenance; Servicing The Cooling System - Toro 74251 Operator's Manual

Figure 49
1. Slotted Nut
2. Two threads or less
showing
5. Check the distance from bottom of slot in nut
to inside edge of hole. Two threads or less
should be showing (Figure 49).
6. If more than two threads are showing remove
nut and install washer between hub and nut.
7. Torque the slotted nut to 125 ft-lb (170 N⋅m)
(Figure 49).
8. Tighten the nut until the next set of slots line
up with the hole in the shaft (Figure 49).
9. Replace the cotter pin.

Adjusting the Caster Pivot

Bearing

Check after every 500 operating hours or at
storage, which ever comes first.
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 50).
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 50).
Important: Make sure spring washers
are installed correctly as shown in
Figure 50.
5. Install the dust cap (Figure 50).
3. Hole in threaded shaft
4. Washer (if needed)
Figure 50
1. Spring Washers
2. Lock Nut
Cooling System
Maintenance

Servicing the Cooling System

Discharge of hot pressurized coolant or
touching hot radiator and surrounding parts
can cause severe burns.
• Do not remove the radiator cap when
the engine is hot. Always allow the
engine to cool at least 15 minutes or
until the radiator cap is cool enough to
touch without burning your hand before
removing the radiator cap.
• Do not touch radiator and surrounding
parts that are hot.
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3. Dust Cap