Cleaning The Cooling Systems; Checking The Tire Pressure; Checking The Wheel Hub Slotted Nut - Toro 74225 Operator's Manual

Figure 45

Cleaning the Cooling Systems

Cleaning the Engine Screen and the Oil
Cooler
Before each use, check and clean engine screen and oil
cooler. Remove any build–up of grass, dirt or other debris
from the oil cooler screen and engine air intake (Fig. 46).
2
Figure 46
1. Engine screen
Cleaning the Engine Fins
Every 100 hours clean engine cylinder and cylinder head
cooling fins. Also clean around carburetor, governor
levers and linkage. This will make sure adequate cooling
to hydraulic pumps, motors and engine and will reduce the
possibility of overheating and mechanical damage.
1. Remove the panels from the engine shroud.
2. Clean the engine cooling fins.
3. Install the panels onto the engine shroud.
M–5035
Ó Ó
1
Ó Ó
Ó Ó Ó Ó
Ó Ó
m–3801
2. Oil cooler
36
1
2
Figure 47
1. Panel
2. Engine shroud

Checking the Tire Pressure

Maintain the air pressure in the front and rear tires as
specified. Uneven tire pressure can cause uneven cut.
Check the pressure at the valve stem after every 50
operating hours or monthly, whichever occurs first
(Fig. 48). Check the tires when they are cold to get the
most accurate pressure reading.
Pressure: 13 psi (90 kPa) drive wheels and caster wheels.
Figure 48
1. Valve stem
Checking the Wheel Hub
Slotted Nut
Check after every 500 operating hours.
The slotted nut needs to be torqued to 125 ft–lb
(170 N m).
1. Stop the engine, set the parking brake, remove the key
and disconnect the spark plug wire(s) from the spark
plug(s).
2. Remove cotter pin.
3. Torque slotted nut to 125 ft–lb (170 N m) (Fig. 49).
4. Check the distance from bottom of slot in nut to inside
edge of hole. Two threads or less should be showing
(Fig. 49).
3
m–5616
m–3801
3. Screws
1
m–1872