HF-7-600 Page 14
SAFETY PRECAUTIONS
1. Do not operate blower with open inlet or outlet port.
2. Do not exceed specified vacuum or pressure limitations.
3. Do not operate above or below recommended blower speed range.
4. Blower is not to be used where non-sparking equipment is specified.
5. Do not operate without belt guard or coupling shield.
Do not exceed sheave or coupling manufacturer’s rim speed limit.
6. The blower and blower discharge piping may be extremely hot and can cause skin burns on
contact.
TROUBLE SHOOTING
No matter how well the equipment is designed and manufactured, there may be times when servicing will
be required due to normal wear, the need for adjustment, or various external causes. Whenever
equipment needs attention, the operator or repairman should be able to locate the cause and correct the
trouble quickly. The Trouble Shooting Chart below is provided to assist the mechanic in those respects.
PROBLEM
POSSIBLE CAUSE
SOLUTION
Knocking
1. Unit out of time.
2. Distortion due to improper
mounting or pipe strains.
3. Excessive pressure differential.
4. Worn gears.
5. Worn bearings.
1. Retime impellers.
2. Check mounting alignment
and relieve pipe strains.
3. Reduce to manufacturer
’s
recommended pressure.
Examine relief valve, re-set if
necessary.
4. Replace timing gears.
5. Replace bearings.
Excessive blower temperature.
1. Too much oil in gear case.
2. Too low operating speed.
3. Clogged filter or muffler.
4. Excessive pressure differential.
5. Worn impeller clearances.
6. Internal contact.
1. Reduce oil level.
2. Increase blower speed.
3. Remove cause of obstruction.
4. Reduce pressure differential
across the blower.
5. Replace impeller.
6. Correct clearances.
Impeller end or tip drag.
1. Insufficient assembled clearances.
2. Case or frame distortion.
3. Excessive operating pressure.
4. Excessive operating temperature.
1. Correct clearances.
2. Check mounting and pipe strain.
3. Remove causes.
4. Remove causes.
Lack of volume.
1. Slipping belts.
2. Worn clearances.
3. Dirty air filter
1. Tighten belts.
2. Re-establish proper clearances.
3. Clean or replace air filter
Excessive bearing or gear wear.
1. Improper lubrication.
1. Correct lubrication level. Replace
dirty oil.
Loss of oil.
1. Bearing housing vents plugged.
2. Worn seal.
1. Clean vents.
2. Replace seals.
