Checking Spark Arrester; Fuel System Maintenance; Inspecting The Lpg System - Toro 74933 Operator's Manual

Installing the Spark Plug
Tighten the spark plug(s) to 22 N∙m (16 ft.-lb).
Figure 53

Checking Spark Arrester

If Equipped
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,
and remove the key. Engage parking brake.
2. Wait for the muffler to cool.
3. Replace the arrester if there are any breaks in the screen
or welds.
4. If the screen is plugged, remove the arrester and shake
loose any particles out of the arrester and clean the
screen with a wire brush (soak the arrester in solvent if
necessary). Install arrester on the exhaust outlet.
Fuel System
Maintenance

Inspecting the LPG System

Service Interval: Before each use or daily—Check the LPG
tank and components.
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.
•
Inspecting the LPG system before each use:
– Visually inspect the tank, hose, and fitting and be alert
to a foul odor coming from the tank.
– The LPG tank should be free of dents or damage.
If the tank show signs of dents or damage, replace
it immediately.
– Check the valve and fitting openings for dirt and
debris.
– Slowly open the valve all the way and listen for a
continuous hiss from the regulator, it 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.
– Do not use if the hoses are abraded, damaged, kinked,
or flattened.
– Ensure that the tank is securely mounted to the
mower. If the tank is loose, the hose or fittings may
leak.
•
Inspecting the LPG system with each tank change:
– Check all gauges, fittings, and valves for damage.
– Look for deterioration, worn or missing O-rings on
the tank connection fitting.
– Inspect the LPG tank and the fuel connection joint
for leaks. Use the following procedure below to
detect leaks:
◊ Apply an approved leak detector solution,
obtained from a trained and qualified LPG
distributor, or a thick non-ammonia soapy water
solution (50% non-ammonia soap and 50%
water). (A leak detector solution that contains
ammonia will cause the fittings to corrode and
leak.)
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