DoAll ZV-3620, Instruction Manual

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PREMATURE BLADE TEETH DULLING
1. The saw band is not being “broken” in on the first few
cuts. Reduce the feeding pressure when making
these cuts.
2. Band speed is too high (this causes abrasion).
3. Saw band pitch is too coarse.
4. Too light a feed pressure. Increase if necessary.
5. Coolant is not properly covering the saw band.
6. Check for faulty material such as heavy scale,
inclusions, hard spots, etc.
7. Check for saw band vibration.
8. Check for chip welding, or for a chipped tooth lodged
in the cut.
9. Check for incorrect saw band tension setting.
10. Inserts are incorrect for the width of blade being
used. This allows the inserts to hit the set teeth
(listen for clicking sounds during saw band
operation).
SAW BAND SLIPS OFF BANDWHEEL
1. The upper bandwheel is not aligned properly. The
saw band needs to be tracked.
2. Check for worn bandwheel tires.
3. Check for slippery coolant, or excessive coolant
volume.
4. Check for incorrect machine alignment.
5. Incorrect saw guide blocks are being used.
6. Check for incorrect saw band tension setting.
SURFACE FINISH ON WORK IS TOO ROUGH
1. Check for a worn saw guide insert (adjust or replace
if necessary.
2. Band speed is too low or feed force is too heavy.
3. Blade pitch is too coarse.
4. Check for saw band vibration.
5. Check for a poor weld in the saw band.
NO COOLANT FLOW (If Applicable)
1. Make sure reservoir is full.
2. Check for a clogged coolant applicator nozzle.
3. Check for a clogged or kinked coolant hose.
SLUGGISH HYDRAULIC BRAKE OPERATION
1. Check for low hydraulic system pressure or low
reservoir level.
2. Check for air in the hydraulic system.
3. Check for faulty hydraulic pump operation.
4. Check for cold hydraulic oil.
5. Relief valve in hydraulic line is opened too far,
dropping system pressure. See tag on the valve
for correct pressure setting.
6. Brake linings are worn.
7. Check for oil on the brake discs.
LOW HYDRAULIC SYSTEM PRESSURE
1. Check the relief valve for incorrect adjustment or
faulty operation.
2. Hydraulic pump is worn or damaged.
HYDRAULIC BRAKES DRAG
1. Check for air in the lines.
2. Brake pad return spring is broken or damaged.
HYDRAULIC BRAKES DON’T OPERATE
1. Check for faulty brake solenoid valve.
2. Brake pad linings are worn.
3. Brake cylinder o-ring is worn or damaged.
TABLE FEED ROUGH AND ERRATIC
1. Air is in the lines, bleed the lines.
2. Table feed cylinder is damaged or worn.
3. Linear bearing rails are damaged.
TROUBLE SHOOTING (Continued....)