Exmark Lazer Z XP Operator's Manual page 38

f) Bleed air from fuel line, by using the priming pump, (See section 5.1.24)
then start the engine to check for leaks.
Replacement Components
31 HP Daihatsu Gas Fuel Filter
27 HP Daihatsu Diesel Fuel Filter
27 HP Daihatsu Diesel Drain Plug O-ring
5.1.24 Fuel priming procedure (27 HP Daihatsu Diesel Units Only):
The primer pump is the gold button located under the seat next to the console in
the front left-hand corner.
a) Push down on the primer pump until the tension becomes firm
(approximately 10-15 pushes).
5.1.25 Change hydraulic system filter:
NOTE: Use only Exmark Part No. 103-1396 for summer use above 32° (0° C) F
or Part No. 103-1574 for winter use below 32° F (0° C).
a) Stop the engine and remove the key.
b) Raise seat.
c) Carefully clean area around filter. It is important that no dirt or
contamination enter hydraulic system.
d) 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.
e) Fill reservoir as stated in Section 5.1.12.
f) Raise the rear of machine up and support with jack stands (or equivalent
support) just high enough to allow drive wheels to turn freely.
g) 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.
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.
5.1.26 Wheel hub - slotted nut torque specification.
Service Interval: 500 hrs
When tightening the slotted nut on the wheel motor tapered shaft:
a) Torque the slotted nut to 125 ft-lbs. (170 N-m).
b) Check distance from bottom of slot in nut to inside edge of hole. Two
threads (0.1" (.25 cm)) or less should be showing.
c) If more than two threads (0.1" (2.5 mm)) are showing remove nut and
install washer (PN 1-523157) between hub and nut.
d) Torque the slotted nut to 125 ft-lbs. (170 N-m).
Service Interval: As required
Service Interval: After First 250 hrs.
Then yearly thereafter
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Briggs & Stratton P/N 498688
Briggs & Stratton P/N 820311
Briggs & Stratton P/N 820348