23
3. Disengage the PTO and set the parking brake.
4. Stop the engine, remove the key, and wait for all
moving parts to stop before leaving the operating
position.
5. Slide the drain hose over the drain valve.
6. Place a pan below the drain hose. Rotate oil drain valve
to allow oil to drain (Fig. 20).
7. When oil has drained completely, close the drain valve.
8. Remove the drain hose (Fig. 20).
Note: Dispose of the used oil at a recycling center.
1
2
m–6438
Figure 20
1.
Oil drain valve
2.
Oil drain tube
9. Change the oil filter, if necessary (Fig. 21).
10. Clean around the oil dipstick and unscrew the cap
(Fig. 18).
11. Slowly pour approximately 80% of the specified oil into
the filler tube (Fig. 18). Refer to Servicing the Engine
Oil, page 22.
12. Check the oil level; refer to Checking the Oil Level,
page 22.
13. Slowly add additional oil to bring it to the full mark.
Changing the Oil Filter (For Models 74330
and 74350 Only)
Replace the oil filter every 100 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 and
Draining the Oil, page 22.
2. Remove the old filter and wipe the filter adapter gasket
surface (Fig. 21).
3. Apply a thin coat of clean oil to the rubber gasket on the
replacement filter (Fig. 21).
1
2
3
1256
Figure 21
1.
Oil filter
2.
Gasket
3.
Adapter
4. 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 to 3/4 turn (Fig. 21).
5. Fill the crankcase with the proper type of new oil; refer
to Changing and Draining the Oil, page 22.
Servicing the Air Cleaner
Foam Element: Clean after every 25 operating hours, or
yearly, whichever occurs first.
Paper Element: Replace after every 100 operating hours or
yearly, whichever occurs first.
Note: Service the air cleaner more frequently (every few
hours) if operating conditions are extremely dusty or sandy.
Removing the Foam and Paper Elements
1. Park the machine on a level surface and disengage the
blade control (PTO).
2. Move the motion control levers to the brake position,
stop the engine, remove the key, and wait for all moving
parts to stop before leaving the operating position.
3. Clean around the air cleaner to prevent dirt from getting
into the engine and causing damage. Pull up on the air
cleaner cover handle and rotate it toward the engine
(Fig. 22). Remove the air cleaner cover.
