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

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). Proper
inflation for caster tires is 16 psi (110 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 4 1/2 inch (11.4 cm) height
position and take as much force as possible off of
the two large deck lift springs by loosening the
nuts at the front of each spring. (Figure 14).
6. Lower the deck to the 1 1/2 inch (3.8 cm)
height position. Place two 1 5/16 inch (3.3 cm)
thick blocks under the rear edge of the cutting
deck skirt; one on each side of the cutting deck
(Figure 14).
7. Place a 1 1/8 inch (2.9 cm) block under the center
front edge, but not under the 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 two bottom chain bolts in slots at the
rear of the cutting deck. Loosen four nuts which
secure front swivels (two per side), until front
chains are loose and front of deck is supported by
the 1 1/8 inch (2.9 cm) block. Do Not loosen
front chain hardware.
10. When hardware is loosened, remaining tension
in the large support springs will tend to rotate
the deck lift handle up, out of the 1 1/2 inch
(3.8 cm) position. Press down on the rear deck
support arm (Figure 14) to firmly return the deck
lift handle to the 1 1/2 inch (3.8 cm) position. Do
Not push on deck lift handle. While continuing to
press down, take the slack out of the rear chains
and tighten hardware at the bottom of the rear
chains. Downward pressure may now be released.
11. 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 1 1/8 inch (2.9 cm) block.
Secure front swivel using locking nut in front of
swivel. Repeat for right side.
1. Swivel
2. Adjust front deck height here
3. Adjust spring tension here
4. 10 inches (25.4 cm) for 48 inch deck; 9 1/2 inches (24.1
cm) for 52 and 60 inch decks
5. Press down firmly here to compress springs while
tightening nuts at bottom of rear chains
6. Adjust rear deck height here
7. Front of unit
12. Recheck that blocks fit just snugly under the
deck skirt and that the tension on all the chains
are approximately equal. Make sure all chain
attachment bolts are tight.
13. Raise deck lift lever to the 4 1/2 inch (11.4 cm)
cutting height position (also transport position
(Figure 8). Adjust spring compression until
proper distance is obtained between the two
washers by turning the nut at the front of each
spring (Figure 14). Lock nuts in position with jam
nuts.
14. Reposition anti-scalp rollers and tighten securely.
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.
33
Maintenance
Figure 14