SIOUX VAC-FORCE 1557 Manuel D'instructions page 6

Before diagnosing problems from the following chart, check that any irregularities are prevented by ensuring that:
1. Air supply pressure is above 75psi.
2. Air supply control valve is open.
3. Drill feed adjustment is screwed down (clockwise) enough to allow correct air supply pressure to fully operate the air
cylinder, therefore allowing air cylinder to work, travel full 1.96" (50 mm) and have enough force to complete a hole.
PROBLEM – VACUUM PAD WON'T ADHERE
CAUSE
1. Vacuum filter blocked.
2. Vacuum generator not working.
3. Vacuum seal dirty, cut or damaged.
4. Vacuum generator working but vacuum pad
won't adhere.
5. Air pressure coming from 2mm hole located
under vacuum pad at rear.
PROBLEM – AIR DRILL WON'T WORK
CAUSE
1. Vacuum pad not adhered to working surface.
2. Air drill not working.
3. Safety valve sticking.
4. Drill feed pressure too high for drill capacity.
PROBLEM – AIR CYLINDER WON'T WORK
CAUSE
1. Damaged "0" Ring seal.
2. Cylinder damaged.
PROBLEM – NOT ENOUGH AIR CYLINDER TRAVEL
CAUSE
1. Drill clamps not in correct position on air drill
and/or cylinder sleeve.
2. Cutter requires more than 1.96" (50 mm)
travel.
3. Cutter is preventing air cylinder travel.
PROBLEM – CAN'T COMPLETE A HOLE
CAUSE
1. Air drill not powerful enough.
2. Worn or improper cutting tools.
3. Cutter is preventing completion of hole.
4. Cylinder at end of travel.
TROUBLE SHOOTING
SOLUTION
Remove and clean sintered filter located under vacuum pad.
Test for vacuum by placing thumb or piece of paper over
vacuum filter for suction.
Inspect seal & replace if necessary. Replacement instructions
supplied with new seal.
Check for holes in working surface. Surface porous and deep
grooves.
Replace both o-rings on safety valve.
SOLUTION
Safety valve is disabling the air drill until the vacuum pad is
securely adhered.
Test air drill with alternate air supply.
Disconnect 3/8" nylon hose from air drill and check for airflow
from hose when vacuum pad is securely adhered to working
surface. If airflow is not present then safety valve is sticking and
requires cleaning.
Screw drill feed adjustment up (anticlockwise) to decrease air
cylinder supply.
SOLUTION
Check for air leaking from drill feed adjustment nut.
Check cylinder sleeve for dents and seals for air leaks.
[Standard 1557 has 1.96" (50 mm) MAX. of travel]
SOLUTION
See Section 4. under SIOUX 1557 – Operating Instructions" on
Page 4.
Reposition drill clamp to allow for a further 1.96" (50 mm) of
travel.
Check cutting depth of cutter to depth of working material.
SOLUTION
Consider optional Reduction Gearbox, Lubricator and more
powerful air drill.
Replace with new and appropriate cutting tools.
Check cutting depth of cutter to thickness of material being
drilled.
Reposition drill clamp to allow for a further 50mm of travel.
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