Exmark lazer Z 790 - Manual (Page 33)

Maintenance
Manual for additional
information.)
1. Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
2. Loosen retaining clips and remove air cleaner
compartment cover.
3. Remove paper element. Check the condition
of the paper element. Replace if dirty, bent or
damaged.
4. Check the condition of the inner element. Replace
whenever it appears dirty, typically every other
time the paper element is replaced. Clean the base
around the inner element before removing, so
dirt does not get into the engine.
5. Do Not wash or use pressurized air to clean
paper element or inner element.
6. Reinstall elements. Position the cover so that the
rubber dust ejector is pointing downward and
secure with retaining clips.
Change Engine Oil
Service Interval: After the first 5 hours
Every 100 hours/Yearly
(whichever comes first)
(May need more often
under severe conditions.)
1. Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
2. Drain oil while engine is warm from operation.
3. The oil drain hose is located on right hand side
of engine at the rear. Place pan under machine
to catch oil. Remove plug from end of drain
hose. Allow oil to drain and replace oil drain plug.
Torque plug to 20-24 ft-lb.
4. Replace the oil filter every other oil change. Clean
around oil filter and unscrew filter to remove.
Before reinstalling new filter, apply a thin coating
of oil on the surface of the rubber seal. Turn
filter clockwise until rubber seal contacts the filter
adapter then tighten filter an additional 1/2 to
3/4 turn.
5. Clean around oil fill cap and remove cap. Fill to
specified capacity and replace cap.
6. Use oil recommended in engine owner’s manual.
Do Not overfill. Start the engine and check for
leaks.
7. Wipe up any spilled oil from engine deck
mounting surfaces.
Check Hydraulic Oil Level
Service Interval: Every 50 hours
1. Stop engine and wait for all moving parts to stop.
Engage parking brake.
2. Wait until the unit cools before checking the
hydraulic oil.
3. Slide the seat all the way forward to access the
caps on the LH and RH hydro drives.
4. Clean the area around hydraulic reservoir cap and
remove cap.
5. Wipe the dipstick clean and re-insert the cap back
into the hydro. Lightly tighten the cap.
6. Remove the cap again and check the level of the
oil on the dipstick. See Figure 23 for oil levels.
Figure 23
1. Full 2. Add
Note: The oil level on the dipstick will be
incorrect if the oil is checked when the unit is hot.
7. If the dipstick oil level is at the “add” mark add
Exmark Premium Hydro oil.
8. Replace hydraulic reservoir cap and tighten until
snug. Do Not overtighten.
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