Spark Plug - Toro 74570 Operator's Manual

Adding Water to the Battery
The best time to add distilled water to the battery is just
before you operate the machine. This lets the water mix
thoroughly with the electrolyte solution.
1. Clean the top of the battery with a paper towel.
2. Remove the filler caps (Fig. 28).
2
Figure 28
1. Filler caps
2. Lower part of tube
3. Slowly pour distilled water into each battery cell until
the level is up to the lower part of the tube (Fig. 28).
Important
Do not overfill the battery. Electrolyte
(sulfuric acid) can cause severe corrosion and damage to
the chassis.
4. Replace the filler caps.
Charging the Battery
Important
Always keep the battery fully charged
(1.260 specific gravity). This is especially important to
prevent battery damage when the temperature is below
32 F (0 C).
1. Remove the battery from the chassis; refer to Removing
the Battery, page 25.
2. Check the electrolyte level; refer to Checking the
Electrolyte Level, page 25.
3. Remove the filler caps from the battery and connect a 2
amp battery charger to the battery posts. Charge the
battery at a rate of 2 amperes or less for 4 hours (12
volts). Do not overcharge the battery. Install the filler
caps after the battery is fully charged.
Warning
Charging the battery produces gasses that can
explode.
Never smoke near the battery and keep sparks and
flames away from battery.
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3
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3. Plates
26
4. Install the battery in the chassis; refer to Installing the
Battery, page 25.

Spark Plug

Service Interval/Specification
Install a new spark plug(s) after every 100 operating hours.
Make sure the air gap between the center and side
electrodes is correct before installing the spark plug(s). Use
a spark plug wrench for removing and installing the spark
plug(s) and a gapping tool/feeler gauge to check and adjust
the air gap.
Type: Champion RC12YC (or equivalent)
Air Gap: .76 mm (0.030 in.)
Removing the Spark Plug(s)
1. Disengage the PTO, set the parking brake, stop the
engine, and remove the ignition key.
2. Open the hood.
3. Pull the wire(s) off of the spark plug(s) (Fig. 29). Clean
around the spark plug(s) to prevent dirt from falling into
the engine and potentially causing damage.
4. Remove the spark plug(s) and metal washer.
1
Figure 29
1. Spark plug wire
Checking the Spark Plug(s)
1. Look at the center of the spark plug(s) (Fig. 30). 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(s). Always
replace the spark plug(s) when it has a black coating, worn
electrodes, an oily film, or cracks.