Exmark Lazer Z XS - Manual (Page 38)

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Reposition the adjusting pulley to the bottom of the slot.
NOTE: When installing a new belt, it is necessary to reposition the right
adjusting pulley upward in the slot in order to position the center of the
spring loaded pulley between the alignment holes.
4.2.5 Deck Belt Tension.
a) The deck belt is tensioned by a self-tensioning idler, no adjustment is
necessary.
4.2.6 Belt Guide Adjustment.
a) Stop engine, wait for all moving parts to stop, and remove key. Engage
parking brake.
b) Remove the belt shield on the right side of mower deck.
c) Note belt guide bolted to deck near the shield support stud and right-hand
pulley. Guide should be 1/8” (3.2 mm) away from the belt, with bolt-end of
guide near end of slot (See Figure 9).
d) If adjustment is necessary, loosen the bolt securing the belt guide and
make proper adjustment. Tighten hardware.
FIGURE 9
4.2.7 Brake Link Adjustment.
Check to make sure brake is adjusted properly.
a) Disengage brake lever (lever down).
b) Measure the length of the spring. Measurement should be 2 3/4” (7.0 cm)
between washers (see Figure 10).
c) If adjustment is necessary, adjust the nyloc nut at the bottom of the spring
to achieve 2 3/4” (7 cm).
d) Engage the brake lever (lever up).
e) The space between the brake spring bracket and the nyloc nut under the
spring should measure the following:
For S/N 603,518 and lower - 1/4” to 5/16” (6.4 – 7.9 mm)
For S/N 603,519 and higher - 1/16” to 3/16” (1.5-4.8 mm)
FIGURE 8