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.
CAUTION
Raising the mower deck for service or
maintenance relying solely on mechanical
or hydraulic jacks could be dangerous. The
mechanical or hydraulic jacks may not be enough
support or may malfunction allowing the unit to
fall, which could cause injury.
Do Not rely solely on mechanical or hydraulic
jacks for support. Use adequate jack stands or
equivalent support.
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 10 psi (69 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 23).
6. Lower the deck to the 1 inch (2.54 cm) height
position on side discharge units or 1 1/2 inches
(3.8 cm) on rear discharge units. Force the left
rear deck support arm downward about 1/4 inch
(6.4 mm) to get the deck to rest at the lowest
height position on the unit. Place locking pliers
between the rear swivel and spring stop to hold
the deck in this position (Figure 23).
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.
Figure 23
1.
Apply downward pressure here
2.
Place locking pliers here to hold spring
3.
Distance-See Spring Compression Distance Chart
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 10).
13. Adjust spring compression until proper distance
is obtained between the two large washers (see
Figure 23 and
Spring Compression Distance
Chart
). Adjustment is made by turning the nut at
the front of each spring (clockwise will shorten
the spring, counterclockwise will lengthen the
spring). Lock in position with jam nuts.
46
