Checking The Spark Arrester; Fuel System Maintenance; Inspecting The Lpg System - Toro Z Master Professional 5000 Series Operator's Manual

Checking the Spark Plug
Important:
Replace the spark plug(s) when it
has: a black coating, worn electrodes, an oily film,
cracks or reuse is questionable.
If you see light brown or gray on the insulator, the
engine is operating properly. A black coating on the
insulator usually means that the air cleaner is dirty.
Set the gap to 0.76 mm (0.030 inches).
Figure 54
Checking the Spark
Arrester
For Models with a Spark Arrester
Service Interval: Every 50 hours
WARNING
Hot particles exhausted during engine
operation may ignite flammable materials.
Fire may result in personal injury or property
damage.
1. Shut off the engine, wait for all moving parts to
stop, remove the key, and engage the parking
brake.
2. Wait for the muffler to cool.
3. If there are any breaks in the screen or welds
are observed, replace the arrester.
4. If the screen is plugged, remove the arrester
and shake loose particles out of the arrester,
and clean the screen with a wire brush (soak in
solvent if necessary).
5. Install the arrester on the exhaust outlet.
Fuel System
Maintenance

Inspecting the LPG System

Service Interval: Before each use or daily—Check
Every 40 hours—Check the LPG hoses,
regulator, and connections.
It is very important to check the LPG tank and
components for wear or leaks.
Important:
Never check for leaks using an open
flame.
Important:
Never use bare hands when checking
the fitting or valve. Escaping LPG vapor and liquid
freezes skin on contact.
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Inspecting the System Before
Each Use
1. Visually inspect the tank, hose, and fitting and
be alert to a foul odor coming from the tank.
Do not use the LPG system if the hoses are
abraded, damaged, kinked, or flattened.
2. Ensure that the LPG tank is free of dents or
damage. If the tank shows signs of dents or
damage, replace it immediately.
3. Check the valve and fitting openings for dirt and
debris.
4. Slowly open the valve all the way and listen for
a continuous hiss from the regulator, which may
indicate a leak.
LPG has a rotten egg or skunk smell added to
it to help detect a gas leak. If you detect a gas
leak:
•
Turn off the LPG valve if you can safely do
so.
•
Leave the area.
•
Contact trained and qualified personnel
immediately.
5. Ensure that the tank is securely mounted to the
mower. If the tank is loose, the hose or fittings
may leak.
Inspecting the System With Each
Tank Change
1. Check all gauges, fittings, and valves for
damage.
2. Look for deterioration and worn or missing
O-rings on the tank connection fitting.
48
the LPG tank and components.