36
M
Figure 44
Cleaning the Cooling Systems
Before each use, check and clean cooling screen. Remove
any build–up of grass, dirt or other debris from the oil
cooler screen and engine air intake. Every 100 hours clean
oil cooler, engine cylinder and cylinder head cooling fins.
Also clean around carburetor, governor levers and linkage.
This will help insure adequate cooling to hydraulic
pumps, motors and engine and will reduce the possibility
of overheating and mechanical damage.
m–3801
1
2
Figure 45
1. Engine screen 2. Oil cooler
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. 46). Check the tires when they are cold to get the
most accurate pressure reading.
Pressure: 13 psi (90 kPa) drive wheels and castor wheels.
1
m–1872
Figure 46
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–lbs (169.5
Nm).
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–lbs (169.5 Nm) (Fig. 47).
4. Check the distance from bottom of slot in nut to inside
edge of hole. Two threads or less should be showing
(Fig. 47).
5. If more than two threads are showing remove nut and
install washer between hub and nut (Fig. 47).
6. Torque the slotted nut to 125 ft–lbs (169.5 Nm)
(Fig. 47).
7. Tighten nut until the next set of slots line up with the
hole in the shaft (Fig. 47).
8. Replace cotter pin.
3
m
1
2
4
Figure 47
1. Slotted Nut
2. Two threads or less
showing
3. Hole in threaded rod
4. Washer (if needed)
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