National Flooring Equipment 550, Инструкция по эксплуатации, Страница: 11 / 28

Machine Operation
www.nationalequipment.com Phone: 763-315-5300 11
PREPARING MACHINE FOR THE JOB
BLADE SETTING
• Blade size and placement will affect performance.
• The harder the material comes up, for best results use a smaller blade.
• Start with a narrow blade, then increase blade size to optimize cutting pass. Nar-
rower blades work better than wider blades and usually clean the fl oor better. Wider
is not always better or faster.
• Bevel on blade is up for concrete (Figure I). Bevel down for wood (Figure J).
• KEEP BLADES SHARP. Dull blades greatly affect the performance of the machine
and reduce cutting ability, resharpen or replace as needed.
• Keep your work area clean and clear of debris. After you have removed a portion
of material, remove it out of the way. This will give the machine maximum perfor-
mance and help to keep the work area safe.
• Always wear gloves when handling blades.
• Everyone in work area should wear eye protection.
• Wood or wood like fl oors: pound down or remove any nails or metal obstruction to
avoid blade damage.
• Blades can be offset in cutting head for easier access to toe kicks or removal along
the wall (See Figure K).
• Sheet vinyl, solid vinyl, rubber tile, urethane or PVC sheet roofi ng, will need to be
scored for best removal results. Nationals #584 Scoring Tool (See Figure L). Score
fl ooring to the width of the blade.
• Self scoring blades are available in a number of sizes. Self scoring blades eliminate
the need for pre-scoring material. Self-scoring blades may make it harder to control
the machine, depending on material. Keep scoring wings sharp at all times.
BLADE CHANGING
1. Place a block under the front of the machine as shown in Figure E raising blade
holder, using a fl at piece of 2 x 4 or something similar.
2. Use extended socket wrench that comes with the 550 or a socket wrench with at
least 3” extension to keep hand safetly away from the sharp edge of the blade.
3. Loosen two blade cover bolts with extended wrench. It is not necessary to remove
bolts.
4. Place blade into cutting head, sliding all the way back to the bolts. If the blade is
wider than the cutting head, center the blade to head. If blade is smaller than the
cutting head, fi rst pass blade should be mounted in the center of the cutting head.
After the fi rst pass is made, the blade can be offset in head to allow wheels to keep
even contact with the fl oor and allow easy access to the wall. Blades of longer
width can be mounted in either holes or slots or put in front of blade cover bolts.
FIG. D
FIG. E
FIG. F
FIG. G
FIG. H
CAUTION:
BLADES ARE SHARP, USE EXTREME CAUTION WHEN HANDLING.
CAUTION:
NEVER CHANGE CUTTING HEAD OR SERVICE BLADES WHILE
MACHINE IS RUNNING.