Tips And Troubleshooting - Exmark Laser Z Ultra Vac Operator's & Parts Manual

6. Tips and Troubleshooting

Your Exmark Ultra Vac has been designed to be the most productive bagging system on the
market. The following tips have been collected to help you get the most out of your Ultra Vac right
from the start.
6.1 When mowing in areas with sandy soil, use low lift blades on the cutting deck and higher
cutting heights to minimize wear on the blower components.
6.2 When mowing in wet conditions, such as just after a rain or in heavy dew, use low lift
blades on the cutting deck to minimize plugging of the blower.
6.3 When the bags get full, the sound of the blower will change and there will be slight
blowout from the front right corner of the deck. Emptying the bags at this point will
minimize the potential for the tube to plug.
6.4 If there is excessive blowout from the deck, check to make sure that the rear screen in
the hood is clear of grass build up. It is recommended that the screen and mesh
portions of the bags be cleaned regularly to maintain proper air flow. This is especially
important in wet conditions.
6.5 During dry conditions check engine air cleaners and clean cooling fins more frequently.
The Ultra Vac has been designed to minimize the impact of dust and debris on the
mower, but bagging can be a dirty environment.
6.6 During dry conditions, switching to a lower lift blade may reduce blowout without hurting
quality of cut.
6.7 Maintaining a ground speed that does not pull down the engine RPM will allow for the
highest productivity and best quality of cut. Bogging the engine RPM down by going too
fast will cause plugging and quality of cut issues.
6.8 When storing the Ultra Vac, it is recommended that any build up in the blower be
cleaned out. Dry grass build up may cause problems with the impeller when the unit is
put back into operation.
6.9 If the blower drive belt snaps or breaks frequently, check the alignment of the idler arm
per section 5. An arm that is bent out of position can cause the belt to jump off of the
idler and be cut by the sheaves.
6.10 If the idler pulley contacts the deck sheave, check the alignment of the idler arm per
section 5. Also check the mounting tube on the deck and the mounting pin on the
blower for bending or excessive wear. This condition is more likely to occur with smaller
deck sizes.
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