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Figure 41
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. 42).
2
Figure 42
1. Engine screen
Cleaning the Engine Fins
Every 100 hours clean the engine cylinder and cylinder
head cooling fins. Also clean around carburetor, governor
levers and linkage. This will ensure adequate cooling of
the 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
34
1
2
Figure 43
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. 44). Check the tires when they are cold to get the
most accurate pressure reading.
Pressure: 13 psi (90 kPa) drive wheels and castor wheels.
Figure 44
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 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–lbs (169.5 N m) (Fig. 45).
4. Check the distance from bottom of slot in nut to inside
edge of hole. Two threads or less should be showing
(Fig. 45).
5. If more than two threads are showing remove nut and
install washer between hub and nut (Fig. 45).
3
m–5766
3. Screws
1
m–1872
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