Change Hydraulic System Filter; Fuel Pressure Relief And Priming Procedure - Exmark LAZER Z Operator's Manual

Maintenance
Figure 14
For Kohler EFI Units Route the fuel line hoses as shown.
1. Fuel line
Fuel Pressure Relief And
Priming Procedure (28HP
Kohler EFI Units Only)
Service Interval: As required
WARNING
Fuel system components remain under high
pressure, even when the engine is stopped.
Failure to relieve pressure from the system
can cause gasoline to spray or spill. Spilled
fuel or fuel vapors could be ignited by hot
parts.
• Allow the engine to cool completely.
• Safely relieve the pressure from the fuel
system before attempting to service the
fuel system.
Note: A Kohler pressure gauge with an integral relief
valve (Kohler Part No. 2445504) is recommended for
relieving pressure and purging air in the fuel system.
To relieve the system of pressure:
1. Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
2. Allow the engine to cool completely.
2. Plastic tie
3. Connect the black tester hose from the Kohler
pressure gauge to the test valve in the fuel rail.
4. Route the clear hose into a portable gasoline
container and depress the button on the tester
relief valve.
Change Hydraulic System
Filter
Service Interval: After the first 250 hours
Note: Use only Exmark Part No. 109–4180 for
summer use above 32°F (0°C) or Part No. 1–523541
for winter use below 32°F (0°C).
1. Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
2. Raise seat.
3. Carefully clean area around filter. It is important
that no dirt or contamination enter hydraulic
system.
4. Unscrew filter to remove and allow oil to drain
from reservoir.
Important: Before reinstalling new filter, fill
it with Mobil 1 15W-50 and apply a thin coat
of oil on the surface of the rubber seal.
Turn filter clockwise until rubber seal contacts the
filter adapter, then tighten the filter an additional
2/3 to 3/4 turn.
5. Fill reservoir as stated in Check Hydraulic Oil
Level section.
6. Raise the rear of machine up and support with
jack stands (or equivalent support) just high
enough to allow drive wheels to turn freely.
7. Start engine and move throttle control ahead to
full throttle position. Move the speed control
levers to the full speed and run for several
minutes. Shut down machine and recheck oil
level.
Note: Do Not change hydraulic system oil (except
for what can be drained when changing filter), unless
it is felt the oil has been contaminated or been
extremely hot.
Changing oil unnecessarily could damage hydraulic
system by introducing contaminates into the system.
36
Yearly thereafter