Exmark ULTRA VAC QDS Operator's Manual page 19

each side of the unit. The lower rear section of the
tractor frame extends back between the rear wheels
and serves as a stop for tipping backward. Having
a full width ramp provides a surface for the frame
members to contact if the unit starts to tip backward.
If it is not possible to use one full width ramp, use
enough individual ramps to simulate a full width
continuous ramp.
Ramp should be long enough so that the angles
between the ramp and the ground and the ramp and
the trailer or truck Do Not exceed 15°. A steeper
angle may cause mower deck components to get
caught as the unit moves from ramp to trailer or
truck. Steeper angles may also cause the unit to tip
backward. If loading on or near a slope, position
the trailer or truck so it is on the down side of the
slope and the ramp extends up the slope. This will
minimize the ramp angle. The trailer or truck should
be as level as possible.
Important: Do Not attempt to turn the unit
while on the ramp, you may lose control and
drive off the side.
Avoid sudden acceleration when driving up a ramp
and sudden deceleration when backing down a ramp.
Both maneuvers can cause the unit to tip backward.
Rollover Protection System (ROPS)
The roll bar has an intermediate position that allows
the bar to be lowered to provide over head clearance,
but not rest directly on the Ultra Vac assembly. Insert
a 1/2 x 3 inch bolt and 1/2 inch nut (or Exmark
service parts: clevis pin P/N 283-55 and hairpin P/N
1-806005) into the downstop hole on each side and
lower the roll bar.
Figure 24
1. Intermediate position
Important: The roll bar is an integral and
effective safety device. Keep the roll bar in the
raised and locked position when operating the
2. Downstop hole
mower. Lower the roll bar temporarily only when
absolutely necessary.
Refer to the Operator's manual supplied with your
tractor for additional ROPS safety and operating
instructions.
19
Operation