Exmark Lazer HP - Manual (Page 47)

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g) Adjust anti-scalp rollers for Normal Operating Conditions. Stop engine and
remove key. Place rollers in one of the positions shown in Fig. 10. Rollers
will maintain 3/4 in. (19 mm) clearance to the ground to minimize gouging
and roller wear or damage. For Maximum Flotation, place rollers one
hole position lower. Rollers should maintain 1/4 in. (6.4 mm) minimum
clearance to ground. Do Not adjust rollers to support the deck. Be sure
bolt is tightened properly or loss of anti-scalp roller may result.
FIG. 10
ANTI-SCALP ROLLER ADJUSTMENT
5.2.2 Deck Leveling
a) Position mower on a flat surface.
b) Stop engine and remove key.
c) Check tire pressure of all four (4) tires. If needed, adjust to 13 psi (90 kPa).
d) Set anti-scalp rollers to top holes or remove them completely for this
adjustment.
e) Raise the deck to the 5” height position (also transport position) and take
all force off of the two large deck lift springs by loosening the nuts at the
front of each spring. See Fig. 11.
f) For 52” and 60” units - Lower the deck to the 1-1/2” height position.
For 72” units – Lower the deck to the 1-1/2” height position. Force the left
rear deck support arm downward about 1/4” to get the deck to rest at the 1-
1/2” height position. Place locking pliers between the rear swivel and spring
stop to hold the deck in this position. See Fig. 11.
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 approximately 20-1/4 inches (Kawasaki
Liquid-cooled units (Serial Nos. 259,999 & Lower) with a 52” deck should
measure approximately 20 inches). Adjust the length by turning nuts on
either side of the front swivels.
NOTE: Adjust so that all four (4) swivels are free in their holes. This may
cause the measurement to vary slightly from side to side.
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 brackets). Tighten hardware on the rear chains.
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.