Adjustments; Deck Leveling; Pump Drive Belt Tension; Mule Drive Belt Tension Adjustment - Exmark LAZER Z Operator's Manual

Maintenance

Adjustments

Note: Disengage PTO, shut off engine, wait for
all moving parts to stop, engage parking brake, and
remove key before servicing, cleaning, or making any
adjustments to the unit.

Deck Leveling

1. Position mower on a flat surface.
2. Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
3. Check tire pressure in drive tires. Proper inflation
pressure for tires is 13 psi (90 kPa). Adjust if
necessary.
4. Set anti-scalp rollers to top holes or remove them
completely for this adjustment.
5. Raise the deck to the 5 inch (12.7 cm) 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 (Figure 15).
6. Lower the deck to the 1 inch (2.54 cm) height
position. Force the left rear deck support arm
downward about 1/4 inch (6.4 mm) to get the
deck to rest at the 1 inch height position. Place
locking pliers between the rear swivel and spring
stop to hold the deck in this position (Figure 15).
7. Place a 3/4 inch (19 mm) thick block of wood
under each of the two rear anti- scalp roller
brackets and place one under one of the front
center anti-scalp roller brackets.
8. Loosen the two top chain bolts in slots in the rear
deck lift arms. Loosen jam nuts and back off the
socket head adjusting screws on the 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.
9. Loosen the four 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
inch (19 mm) block. Do Not loosen the front
chain hardware.
10. 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 inch (19 mm) block. Secure
front swivel using locking nut in front of swivel.
Repeat for right side.
11. Recheck that the 3/4 inch (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.
1. Apply downward pressure here
2. Place locking pliers here to hold spring
3. 13–1/2 inches (34.3 cm) for cut heights at 2 inches or
above or 14 inches (35.6 cm) for cut heights below 2
inches
4. Remove force on deck springs by loosening nuts here
5. Swivel
6. Front of unit
7. Socket head adjusting screw
8. Jam nut
12. Raise deck lift lever to the 5 inch (12.7 cm)
cutting height position (Figure 8). Adjust spring
compression until proper distance is obtained
between the two large washers (Figure 15).
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:
1. Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
2. Check to make sure the center of the bolt head
in the center of the spring loaded pulley, on left
38
Figure 15