Exmark LAZER Z Operator's Manual page 41

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4.2.3
4.2.4
bottom of the arms until the chains are just loose. Turn the socket head
adjusting screws in until slack is taken out of each chain. Tighten the jam
nuts. Tighten the chain bolts in the deck lift arms making sure they don't
move while tightening.
i) Loosen the four (4) nuts which secure the front swivels (two per side) until
the front chains are loose and front of deck is supported by the 3/4" (19
mm) block. Do not loosen the front chain hardware.
j) On left side, adjust front swivel using the locking nut behind the swivel until
the front chain is tight and all slack is removed from linkage. Do not lift
front of deck off 3/4" (19 mm) block. Secure front swivel using locking nut
in front of swivel. Repeat for right side.
k) Recheck that the 3/4" (19 mm) blocks fit just snugly under the brackets and
that the tension on all the chains is approximately equal. Make sure all
chain attachment bolts are tight. Reposition anti-scalp rollers and tighten
securely.
Place locking pliers
here to hold spring
Apply downward
pressure here
Jam nut
Socket head
adjusting screw
l) Raise deck lift lever to the 5" (12.7 cm) cutting height position See Figure 6.
Adjust spring compression until proper distance is obtained between the two
large washers (See Figure 8). 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.
Pump Drive Belt Tension:
Self-tensioning - No adjustment necessary.
Mule Drive Belt Tension Adjustment:
Self-tensioning idler, adjust as follows:
a) Stop engine, wait for all moving parts to stop, and remove key. Engage
parking brake.
b) Check to make sure the center of the bolt head in the center of the spring
loaded pulley, on left side engine deck support, is positioned between the
centers of the two alignment holes in the left support plate (See Figure 9).
It is necessary to adjust the belt tension when the center of the bolt head is
at or below the center of the bottom alignment hole.
c) When adjustment is necessary, loosen the idler pulley on the right-hand
side so it can move up and down in the slot.
Place a wrench on the 3/8" nut in the center of the spring loaded pulley and
apply upward pressure to relieve tension on the spring (a 1/2" drive breaker
bar and 9/16 socket works best).
Reposition the adjusting pulley to the bottom of the slot.
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13 ½" (29.2 cm) For cut heights at 2" or above
14" (35.6 cm) For cut heights below 2"
G0905
FIGURE 8
36
Remove force on
deck springs by
loosening nuts here
Swivel
Front of Unit