Exmark Lazer Z Operator's Manual page 35

g) Place a 3/4" thick block of wood under each of the two (2) rear anti- scalp roller
brackets and place one under one of the front center anti-scalp roller brackets.
h) Loosen the four (4) top chain bolts in slots. Check the length of the rod swivel
assemblies. The distance from the outside of the rear swivel to the outside of
the front swivel should be about 20-1/4 inches. Make sure that all four (4)
swivels
are free, adjust so they are free in holes. Note: This may not measure 20-1/4
swivels.
i) Adjust the two (2) rear upper chain attachment bolts in the slots to take the
slack out of the chains. (Deck is still supported by wood blocks under the caster roller
j) Adjust the two (2) front upper chain attachment bolts in the slots to take the
slack
of the
shorten
side the same
k) Recheck that the 3/4" blocks fit just snugly under the brackets and that the
attachment bolts are tight. Reposition anti-scalp rollers and tighten securely.
l) Raise deck lift lever to the 5" cutting height position
See Fig 6. Adjust spring compression until proper distance is obtained
between the two large washers (See Fig 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.
5.2.3 Pump Drive Belt Tension.
Self-tensioning - No adjustment necessary.
5.2.4 Mule Drive Belt Tension Adjustment.
Self-tensioning idler, adjust as follows:
a) Stop engine and remove key.
b) Check to make sure the bolt in the center of the spring loaded pulley,
on left side engine deck support, is positioned in between the two
alignment holes in the left support plate (See Fig 9). It is necessary to
adjust the belt tension if any part of the bolthead is visible through 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.
inches on each side. Adjust length by turning nuts on either side of front
brackets). Tighten hardware on the rear chains.
out of the chains. (Deck is still supported by one wood block under one
front roller brackets) If the bolts are all the way to the end of the slots,
or lengthen the rod/swivel assemblies as required, adjust each
amount.
tension on all the chains are approximately equal. Make sure all chain
SWIVEL ADJUSTMENT
SPRING COMPRESSION ADJUSTMENT
- - 30
FIG. 8