Check Hydraulic Oil Level; Check Tire Pressures - Exmark Frontrunner 720,000 & Higher Serial Nos. Operator's Manual

5. 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 2/3 to
3/4 turn.
6. Clean around oil fill cap and remove cap. Fill to
specified capacity and replace cap.
7. Use oil recommended in engine owner's manual.
Do Not overfill. Start the engine and check for
leaks.

Check Hydraulic Oil Level

Service Interval: Every 40 hours
1. Stop engine and wait for all moving parts to stop.
Engage parking brake.
2. Tilt seat up.
3. Clean area around hydraulic reservoir cap and
remove cap. Oil level should be to the top of the
baffle inside the tank. If not, add oil. Use only
Mobil 1 15W-50 synthetic motor oil. Replace
hydraulic reservoir cap and tighten until snug. Do
Not overtighten.
Note: The baffle is labeled "HOT" and
"COLD". The oil level varies with the
temperature of the oil. The "HOT" level shows
the level of oil when it is at 225°F (107°C). The
"COLD" level shows the level of the oil when
it is at 75°F (24°C). Fill to the appropriate level
depending upon the temperature of the oil. For
example: If the oil is about 150°F (65°C), fill to
halfway between the "HOT" and "COLD" levels.
If the oil is at room temperature (about 75°F
(24°C)), fill only to the "COLD" level.
Check Auxiliary Hydraulic
Oil Level
Service Interval: As required
Note: Check the auxiliary hydraulic oil level if there
is evidence of a leak or the hydraulic cylinder does
not perform normally.
1. Retract the hydraulic cylinder.
2. Stop engine and wait for all moving parts to stop.
3. Tilt the seat forward.
4. Locate the auxiliary hydraulic power unit reservoir
(see Figure 9).
1. Auxiliary hydraulic reservoir plug
5. Clean area around the reservoir plug and remove.
Oil level should be up to the reservoir plug hole.
If not, add oil. Use only Mobil 1 15W-50 synthetic
motor oil. Replace reservoir plug and tighten until
snug. Do Not overtighten.

Check Tire Pressures

Service Interval: Every 40 hours
1. Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
2. Check tire pressure in drive tires.
• For 23HP Kohler Units: The drive tires
should be inflated to 13 psi (90 kpa).
• For 27HP Kohler & 31HP Briggs & Stratton
Units: The drive tires should be inflated to 9
psi (62 kpa).
3. The rear caster tire(s) is semi-pneumatic and does
not need to be inflated.
Note: Do Not add any type of tire liner or foam
fill material to the tires. Excessive loads created by
foam filled tires may cause failures to the hydro drive
system, frame, and other components. Foam filling
tires will void the warranty.
27
Maintenance
Figure 9