Exmark Laser Z XP Operator's Manual page 42

Left Side Spring – 5 1/2" ± 1/8" (14.0 ± 0.3 cm)
Right Side Spring – 5 3/8" ± 1/8" (13.7 ± 0.3 cm)
c) If the spring does not have the correct measurement, loosen the nut holding the
adjustable idler pulley on each side so they can move up and down in the slot.
d) Relieve pressure on the spring-loaded idler pulleys.
e) Reposition the adjusting pulleys lower in the slot and tighten the nut.
f) Re-check to make sure the coils of the spring on the spring-loaded idler pulley
have the correct measurement. Repeat as necessary on both sides of the unit.
5.2.6 Deck Belt Tension.
a) The deck belt is tensioned by a self-tensioning idler, no adjustment is
necessary.
5.2.7 Alternator belt tension.
a) Stop engine, wait for all moving parts to stop, and remove key.
b) Remove engine air deflector located behind seat.
c) To tighten alternator belt, loosen both upper and lower alternator mounting
bolts. Rotate alternator out, away from engine and re-tighten hardware to
secure in place.
d) When properly tensioned, the alternator belt will deflect 3/8"-1/2" (9-13 mm)
while applying 22 pounds of force to the belt midway between fan and
alternator.
5.2.8 Belt Guide Adjustment.
a) Stop engine, wait for all moving parts to stop, and remove key.
b) Remove the belt shield on the right side of mower deck.
c) Locate belt guide bolted to deck near the shield support stud and right-hand
pulley. Guide should be 1/8" (3 mm) away from the belt, with bolt-end of
guide near end of slot (See Figure 11).
d) If adjustment is necessary, loosen the bolt securing the belt guide and
make proper adjustment. Tighten hardware.
FIGURE 10
MULE DRIVE BELTS ADJUSTMENT
FIGURE 11
BELT GUIDE POSITIONING
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