Exmark Lazer Z XP Operator's Manual page 41

j) Adjust the two (2) front upper chain attachment bolts in the slots to take the
slack out of the chains. (Deck is still supported by one wood block under
one of the front roller brackets) If the bolts are all the way to the end of the
slots, shorten or lengthen the rod/swivel assemblies as required, adjust
each side the same amount.
k) Recheck that the 3/4" (19 mm) blocks fit just snugly under the brackets and
that the tension on all the chains are approximately equal. Make sure all chain
attachment bolts are tight. Reposition anti-scalp rollers and tighten securely.
l) Raise deck lift lever to the 5" (12.7 cm) cutting height position See Fig 9.
Adjust spring compression until proper distance is obtained between the two
large washers (See Fig 11). Adjustment is made by turning the nut at the
front of each spring (clockwise will shorten the spring, counter-clockwise will
lengthen the spring). Lock in position with jam nuts.
NOTE: When above adjustments have been made, the front of the
deck will be slightly lower than the rear of the deck.
5.2.3 Wheel Drive Pump Belt Tension.
Self-tensioning - No adjustment necessary.
5.2.4 Fan Pump Belt Tension.
Self-tensioning – No adjustment necessary.
5.2.5 Mule Drive Belts Tension Adjustment.
Self-tensioning idlers, adjust as follows:
a) Stop engine and remove key.
b) Check to make sure the coils of the spring on the spring-loaded idler pulley
measures as listed below. See Figure 12.
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.
FIG. 11
SWIVEL ADJUSTMENT
SPRING COMPRESSION ADJUSTMENT
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