Exmark Ultra VAC QDS Operator's & Parts Manual page 12

NOTE: On units with wrench flats on the spindle just above the blade use a 1-inch
wrench on the flat sides of the spindle shaft to prevent the spindle from turning. On
units that do not have a wrench flat, block the blade rotation with a block of wood
between the blade and baffles as indicated in the blade service section of the Lazer Z
operator's manual. Do not use the blade bolt to prevent rotation. Check blade bolt
torque after completing this installation (115 – 120 ft. lbs.).
2.3.7 Re-install the deck drive belt in the lower groove of the double sheave. Install the
plug (Item 24) into the bore of the double sheave.
2.3.8 Remove the discharge chute from the deck. Discard the mounting hardware, but
save the discharge chute for use during side discharge operation. The chute
pivot pin (Item 21) and hairpin (Item 22) may be stored in the pivot holes on the
discharge chute during bagging operation.
2.3.9 Install the belt cover mounting stud (Item 27) included in the Ultra Vac QDS completing
kit.
For 60 inch units only, install the spacer (Item 29), two 7/16 spring disk washers
(Item 30) and the plastic knob as shown in Figure 3. The knob does not need to be
tightened against the washers at this time.
2.3.10 Install the mounting pin weldment (Item 18) to the blower assembly using the 3/8-16 x
.75 screws (Item 28) and whizlock nuts (Item 24). Maximum deck clearance will be
provided if the bolts are installed from below the mounting pin. The mount pin can be
installed in two positions. For 60 inch decks the pin should be installed as far away
from the bumper end as possible. For 72 inch decks that pin should be installed close
to the bumper end.
2.3.11 Install the belt (Item 13) onto the blower by working it around the impeller sheave.
2.3.12 72" units serial number 259,999 and below will require the deck to be modified by
adding the accessory mounting tube. Exmark kit 103-0583 contains the parts and
templates required. Follow the instructions in this kit. These decks will also require
drilling the hole at the front upper corner of the discharge opening to ½ inch diameter.
(See Figure 4). Touch up with red paint Exmark P/N 1-850337.
FIGURE 2
FIGURE 3
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