Changing The Oil; Servicing The Spark Plug; Changing The Oil Filter - Toro 74179 Operator's Manual

Changing the Oil

1. Start the engine and let it run for five minutes. This
warms the oil so that it drains better.
2. Park the machine so that the drain side is slightly lower
than the opposite side to ensure that the oil drains
completely. Disengage the power take off (PTO), set the
parking brake, stop the engine, and remove the key.
3. Place a pan below the oil drain. Use either a flat screw
driver, 3/8 inch wrench, or 10 mm wrench to open the
valve (Fig. 34).
4. Rotate the valve end clockwise to close the valve.
Rotate the valve end counterclockwise to open the valve
(Fig. 34).
5. When the oil has drained completely, close the drain
valve (Fig. 34).
Note: Dispose of the used oil at a certified recycling center.
1
Figure 34
1. Oil drain valve
6. Slowly pour approximately 80% of the specified oil into
the filler cap (Fig. 33). Refer to Servicing the Engine
Oil, page 30.
7. Check the oil level; refer to Checking the Oil Level,
page 30.
8. Slowly add additional oil to bring it to the full mark.

Changing the Oil Filter

Replace the oil filter every 200 hours or every other oil
change.
Note: Change the oil filter more frequently when operating
conditions are extremely dusty or sandy.
1. Drain the oil from the engine; refer to Changing the Oil,
page 31.
2. Remove the old filter (Fig. 35).
3. Apply a thin coat of new oil to the rubber gasket on the
replacement filter (Fig. 35).
1
1. Oil filter
4. Install the replacement oil filter to the adapter. Turn the
oil filter clockwise until the rubber gasket contacts the
filter adapter; then tighten the filter an additional 3/4
turn (Fig. 35).
5. Fill the crankcase with the proper type of new oil; refer
to Servicing the Engine Oil, page 30.
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Servicing the Spark Plug

Check the spark plug(s) after every 100 operating hours.
Make sure that the air gap between the center and side
electrodes is correct before installing the spark plug. 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. Install a new spark plug(s) if necessary.
Type: NGK BPR5ES (or equivalent)
Air Gap: 0.030 inch (0.76 mm)
Removing the Spark Plug
1. Disengage the power take off (PTO), set the parking
brake, stop the engine, and remove the key.
2. Pull the wire(s) off of the spark plug(s) (Fig. 36). Clean
around the spark plug(s) to prevent dirt from falling into
the engine and potentially causing damage.
3. Remove the spark plug(s).
31
2
Figure 35
2. Adapter
(s)
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