Toro 30530 - Checking the Tire Pressure; Cleaning the Cooling System; Greasing and Lubrication

30
4. Remove the spark plug and metal washer.
2
1
m–4757
Figure 33
1. Spark plug wire 2. Spark plug
Checking the Spark Plug
1. Look at the center of the spark plug (Fig. 34). If you see
light brown or gray on the insulator, the engine is
operating properly. A black coating on the insulator
usually means the air cleaner is dirty.
Important Never clean the spark plug. Always replace
the spark plug when it has: a black coating, worn
electrodes, an oily film, or cracks.
2. Check the gap between the center and side electrodes
(Fig. 34). Bend the side electrode if the gap is not
correct (Fig. 34).
0.040 inch
2
3
1
(1.02 mm)
Figure 34
1. Center electrode insulator
2. Side electrode
3. Air gap (not to scale)
Installing the Spark Plug
1. Install the spark plug and metal washer. Make sure the
air gap is set correctly.
2. Tighten the spark plug to 20 ft-lb (27 N.m).
3. Push the wire onto the spark plug (Fig. 33).
Checking the Tire Pressure
Service Interval/Specification
Maintain the air pressure in the front and rear tires as
specified. Check the pressure at the valve stem after every
50 operating hours or monthly, whichever occurs first
(Fig. 35). Check the tires when they are cold to get the most
accurate pressure reading.
Pressure: 15 psi (103 kPa) rear tires
25–30 psi (172–207 kPa) caster tires
1
Figure 35
1. Valve stem
Cleaning the Cooling System
Service Interval/Specification
Before each use, check and clean the engine cooling
system. Remove any buildup of grass, dirt, or other debris
from the cylinder and cylinder head cooling fins, air intake
screen on flywheel end, and carburetor-governor levers and
linkage. This will help ensure adequate cooling and correct
engine speed and will reduce the possibility of overheating
and mechanical damage to the engine.
Greasing and Lubrication
Service Interval/Specification
Grease the areas shown at the intervals given in the
Locating Where to Add Grease section below. Grease them
more frequently when operating conditions are extremely
dusty or sandy.
Grease with No. 2 general-purpose lithium-base or
molybdenum-base grease.