Exmark Lazer Z Operator's Manual page 47

Figure 34
1. Use wrench here for blade installation. This nut has
been torqued to 90 ft-lb (122 N-m) minimum
2. Torque to 50-60 ft-lb (68-81 N-m) Apply lubricant to
threads as needed to prevent seizing. Copper-based
anti-seize preferable. Grease acceptable substitute.
C. Apply lubricant to threads of blade bolt to
prevent seizing. Copper-based anti-seize
preferable. Grease acceptable substitute.
Install blade bolt finger tight. Place wrench
on the top spindle nut then torque the blade
bolts to 50-60 ft-lb (68-81 N-m).
Important: On rear discharge decks, the RH
blade rotates counterclockwise. Be sure to
reinstall that blade onto the RH spindle only.
WARNING
Incorrect installation of the blade or
components used to retain the blade can
be dangerous. Failure to use all original
components and assembled as shown could
allow a blade or blade component to be
thrown out from under the deck resulting in
serious personal injury or death.
Always install the original Exmark blades,
blade bushings, and blade bolts as shown.
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47
Maintenance