Barranca Diamond BD-2003E Pro Series Core Saw - Manual (Page 25)

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LOSS OF TENSION
1. Steel center has been overheating as a result of blade spinning on arbor.
Check water flow, distribution and lines. Tighten the blade shaft nut. Make certain the drive pin is functioning (on
concrete saws).
2. Steel center has been overheating from rubbing the side of material being cut.
Make certain blade RPM is correct so the blade operates at its tensioned speed. Tune engine according to
manufacturer’s manual.
3. Unequal pressure at blade clamping collars.
Blade clamping collars must be identical in diameter and the recommended size.
BD-2003 CORE SAW TROUBLESHOOTING
BLADE WORN OUT-OF-ROUND
1. Shaft bearings are worn (masonry and concrete).
Install new blade shaft bearings or blade shaft, as required.
2. Engine is not properly tuned on concrete saw, causing surges in blade rotation.
Tune engine according to manufacturer’s manual.
3. Blade arbor hole is damaged from previous incorrect mounting.
Replace worn shaft or mounting arbor bushing. Bond is too hard for material, causing a “rounding”
and wearing one half of the blade more than the other. Make certain that drive pin is functioning. Use
proper blade specification.
BLADE WOBBLES
1. Blade runs at improper speed.
Check for bad bearings, bent shaft, or worn mounting arbor. Speed of the saw
is either too fast or too slow for the size of the blade. RPM of the saw should
be verified to the specific speeds established by the NASI Standards for
minimum and maximum blade speeds; make certain that blade shaft is
running at recommended RPM to match tensioned speed of blade. Should the
blade continue to wobble after verification of the saw RPM, then the blade
should be returned to the manufacturer to be retensioned and flattened.
2. Blade collar diameters are not identical.
Check blade collar discs to make sure they are clean, flat and of correct diameter.
3. Blade is bent as a result of dropping or being twisted in the cut during
operation.
Blade should be returned to the manufacturer to be retensioned and flattened.
4. Loss of blade tension.
(See Loss of Tension)
SEGMENT LOSS
1. Overheating due to lack of water.
Check water feed lines and make sure water flow is adequate on both sides
of blade.
2. Steel center is worn from undercutting.
Use sufficient water to flush out the cut.
3. Defective blade collars are causing blade misalignment.
Clean blade collars or replace is collars are under recommended diameter.
4. Blade is cutting out of round, causing a pounding motion.
Replace worn bearings; realign blade shaft or replace worn blade mounting
arbor.
5. Improper blade tension.
Ensure blade is running at correct RPM. Blade is tensioned for correct RPM.
Tune engine according to manufacturer’s manual.