Servicing The Tracks - Toro TX 420 Operator's Manual

6. Remove the oil fill cap and slowly pour approximately
80% of the specified amount of oil in through the
valve cover.
7. Check the oil level; refer to Checking the Oil Level,
page 15.
8. Slowly add additional oil to bring the level to the F
(full) mark on the dipstick.
9. Replace the fill cap.
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 hot, dusty, or sandy.
1. Drain the oil from the engine; refer to Changing the
Oil, page 29.
2. Place a shallow pan or rag under the filter to catch oil.
3. Remove the old filter (Fig. 33) and wipe the surface of
the filter adapter gasket.
Figure 33
1. Oil filter
4. Pour new oil of the proper type through the center hole
of the filter. Stop pouring when the oil reaches the
bottom of the threads.
5. Allow a minute or two for the oil to be absorbed by
filter material, then pour off the excess oil.
6. Apply a thin coat of new oil to the rubber gasket on
the replacement filter.
7. Install the replacement oil filter to the filter adapter.
Turn the oil filter clockwise until the rubber gasket
contacts the filter adapter, then tighten the filter an
additional 1/2 turn.
8. Fill the crankcase with the proper type of new oil;
refer to Changing the Oil, page 29.
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Servicing the Tracks

Check the tracks for excessive wear and clean them
periodically. If the tracks are worn, replace them. Check
the road wheels yearly.
Cleaning the Tracks
1. With a bucket on the loader arms, lower the bucket to
the ground so that the front of the traction unit lifts off
of the ground a few inches.
2. Stop the engine, and remove the key.
3. Using a water hose or pressure washer, remove dirt
from each track system.
Important
Ensure that you only use high-pressure
water to wash the track area. Do not use a high-pressure
washer to clean the rest of the traction unit. High-pressure
washing can damage the electrical system and hydraulic
valves or deplete grease.
Important Ensure that you fully clean the road
wheels, the tension wheel, and the drive sprocket (Fig.
34). The road wheels should rotate freely when clean.
1
2
3
4
Figure 34
1. Track
2. Tension wheel
Adjusting the Track Tension
Check and adjust the track tension every 100 operating
hours. There should be 2-3/4 inches (7 cm) between the
tension nut and the back of the tension tube (Fig. 35). If
not, adjust the track tension using the following
procedure:
m–4736
3. Road wheels
4. Drive Sprocket