Marshalltown SP684 SURFACE SHARK Surface Planer - Manual (Page 25)

SP684 SuRFACE ShARK SuRFACE PLANER PAGE 25
2) Flail cutting depth is controlled by the height
adjustment lever . Rotate the lever counterclockwise
to raise the flail drum off the work surface. Rotate
the lever clockwise to lower the flail drum to the work
surface. The height adjustment lever can be locked
in position by dropping the connecting capscrew head
through one of the two holes provided. Each complete
turn will raise or lower the flail drum approximately
1/16 inch (1.6 mm). using the height adjustment lever,
lower the flail drum into the work surface to the desired
depth.
3) Proper operator position will enhance operational
safety and overall productivity. FIGuRE 24. operate
the engine at maximum, governed speed. Consult the
material supplied by the engine manufacturer and the
Specifications section for specific information.
FIGuRE 23
4) The wide variety of potential work surface
materials along with the corresponding variety of job
site environments, makes it impossible to develop
a standardized operating procedure for the Surface
Planer. use of the Surface Planer will require constant
trial and error testing until satisfactory results are
achieved. Experience gained over time and common
sense will help to minimize the amount of necessary
testing. Many factors will directly affect the operating
parameters and/or techniques utilized for a specialized
job application. Some of these factors include:
FIGuRE 24
a) Work surface material yield and tensile value. As
a general rule, these values will determine the cutting
depth achieved in one pass. Materials with high yield
and tensile values will characteristically resist/limit
flail penetration. For such materials, the accepted
procedure is to make a number of shallow passes
over the work surface rather than attempt to make a
single, deep pass. The net effect is to actually increase
productivity: more material removed in less time.
other added benefits to this technique are decreased
vibration, less operator fatigue and increased flail
service life.
b) higher material removal rates can sometimes be
achieved by making a series of shallow passes 90
degrees to each other to form a waffle like pattern.
This technique is especially useful when planing
misaligned sidewalks and joints.
c) Job specifications may require a wide variety of
work surface finishes and textures. The smoothest
surface texture available from the Surface Planer is
very similar to a “broom” type finish. If a smoother
finish and texture is required to meet specifications, a
grinding finish must be specified. This process utilizes
a different process and can not be achieved with the
Surface Planer.
5) The Surface Planer features a “down feed” type
design for the flail drum. The flail drum rotates forward
and towards the front of the machine before the
flails impact the work surface and remove material.
The rotational direction of the drum produces a
“self-propelled” effect that assists the operator when
pushing the machine forward. Conversely, when the
operator pulls the machine back towards himself, he
must exert an additional force to overcome the “self-
propelling” force.