Adjustments - Exmark Ultra Vac QDS Lazer Z HP Operator's Manual

The idler arm may become bent during use or transport. A bent idler arm could
cause the belt to jump off of the idler and be damaged.
1) Make sure the belt cover is installed and run the blower for one to two minutes.
2) Shut off the deck drive, stop engine and wait for all moving parts
to stop. Remove key. Remove the belt cover and check to make sure
that the belt is riding near the center of the flat idler on the idler arm.
3) If the belt is not riding near the center of the idler, remove the blower,
and bend the idler arm slightly.
4) Reinstall the blower and belt cover and repeat steps 1-3 until the belt is
positioned near the center of the idler.
b) Inspect the belt for damage or wear. Replace belt with one of the following.
44" deck – PN 1-653332
48" deck – PN 1-653333
52" deck – PN 1-653438
5.1.5 Clean muffler and rear frame area: Service Interval: Daily
POTENTIAL HAZARD
♦ Operating engine parts, especially the muffler, become
extremely hot.
WHAT CAN HAPPEN
♦ Severe burns can occur on contact.
♦ Debris, such as leaves, grass, brush, etc. can catch fire.
HOW TO AVOID THE HAZARD
♦ Allow engine parts, especially the muffler, to cool before
touching.
♦ Remove accumulated debris from muffler and engine area.
♦ Install and maintain in working order a spark arrester before
using equipment on forest-covered, grass-covered, brush-
covered unimproved land.

5.2 ADJUSTMENTS

Your Ultra Vac QDS was adjusted at the factory to operate properly. However, there are
three basic adjustments that can be made, should your unit require them:
5.2.1 Arm Position: The left and right bellcrank arms control the timing of the left and
right door opening mechanisms. The ends of these arms must be positioned
equally from the upper frame tube for proper actuation. Check this distance with
the door closed. If adjustment is necessary, loosen the allen head clamping
screw on the hub of the right hand arm. Position the arms so that their ends are
the same distance from the upper frame tube. Tighten the clamping bolt to hold
them in this position. See Figure 9.
5.2.2 Door closing: The closing of the door is controlled by the two hinge links (Figure
10 – A). The length of the hinge links can be changed to provide complete
closing of the door and reasonable force on the handle to latch or unlatch the
door. Lengthen the links to reduce the force. Shorten the links to increase the
force. The left and right sides must be approximately equal. With the door
closed, both links should be slightly tight to minimize rattling.
5.2.3 Door opening: After adjusting the hinge links for door closing, the hinge stops
(Figure 10 – B) can be adjusted to obtain maximum door opening. The stop
plates should be adjusted so that the door link contacts them when the upper tube
of the door frame is within .25" (6.4 mm) ± .125" (3.2 mm) from the lower lip of the
molded hood. Both left and right stops must make contact when the door link arm
is at this position.
WARNING
16