Bomar SV 330 DGH, Operating Instructions Manual

Page: 69 / 113

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Problem Possible causes Repair
valve.
7. Saw band drive
cannot be started.
- Pressure switch is wrongly
adjusted.
Set the pressure switch according to
chapter „Servicing and adjustment“
- Pressure switch is defective. Replace defective parts of the pressure
switch.
8. Saw bands tend to
rupture.
- Saw band run not adjusted
properly
Adjust the distance of band from the rim
according to operating instructions.
- Wrongly adjusted band guiding
(hard metal and bearings).
Hard metal pieces and bearings must
be adjusted according to „Servicing and
adjustment“.
- Looseness in the lifting cylinder
mounting.
- Bearings of guiding cubes are
worn out (rolling elements are
damaged or outside ring of
bearing has conical form).
Bearings of guiding cubes must be
replaced. Bearings must be adjusted
according to operating instructions.
Worn out pin of the upper or
bottom holder of the lifting
cylinder. Exchange the upper or bottom holder of
the lifting cylinder.
9. Damage tooth
system of the saw
band
- Geometry of hard metal guiding
cubes is wrongly adjusted.
Hard metal guiding cubes must be
adjusted.
- Bearings of guiding cubes are
worn out.
Bearings of guiding cubes must be
replaced.
10. The saw is cut
downing.
- Grooving on the driving wheel is
worn-out.
Driving wheel must be replaced.
11. Cleansing of the
saw band is not
functional.
- Elastic wheel of the brush drive
is worn-out.
Elastic wheel of the brush must be
replaced.
- The shaft of the brush drive is
rusted.
The shaft of the brush must be cleaned
and oiled.
- The brush position and the
brush cover is adjusted
incorrectly – the cover prevents
the brush from turning.
The brush cover must be repositioned,
in order for the brush to be able to turn.
12. The saw arm
periodically rises
and descends a few
millimeters during
the cut; this
shortens the
lifetime of the saw
band considerably.
- Backslash in driving wheel
mounting on the shaft.
Replace following parts:
the driving shaft for a longer one,
bearings, distance ring, driving wheel,
spring, two covers on the forehead of
the shaft + screws.
- Worn channel for spring.