The Utile Engineering Co. Ltd.
05/02/07
Irthlingborough, Northamptonshire. England
Tel: +44 (0) 1933 650216
Fax: +44 (0) 1933 652738
9 IC090CL
Troubleshooting
The following table shows some typical problems and the remedies.
Note: If assistance is required in determining and correcting the fault with the machine then contact our service
department.
1.
To Dismantle
1.1
Remove the four nuts and washers (24 & 25) and split body (2) from
volute casing (3) taking care not to loose the o-ring (13) (see photo A).
1.2
Grip the drive pulley firmly and remove the lock nut (15), which has a left-
hand thread.
1.3
Pull impeller (1) off shaft and remove key (16) (see photo B).
1.4
To remove the shaft (4) with bearings (8), first remove the drive pulley,
then undo three screws (14) to release the end cap (6). Lift out the thrust
washer (11), the shaft can now be pushed out towards the pulley end
with bearings attached (see photo C).
1.5
To renew the bearing seal (9) first remove circlip (12) then drive out
towards the inner side.
1.6
Clean the mechanical parts carefully.
SYMPTONS CAUSES
REMEDIES
Excessive loss of lubricating oil
Faulty Seal
Replace Seal
Machine revolves in wrong
direction
Incorrect connection of motor terminal
Re-arrange terminal connection
1. Machine operating at higher duty than
specified.
1. Check rating.
2. Blocked intake filter.
2. Clean intake filter.
3.Insufficient or wrong lubrication.
3. Use correct lubrication and feed rates.
4. Unloading valve is not fully open
4. Open unloading valve
Discharge air / gas temperature
excessive
5. High inlet temperature
5. Reduce inlet temperature.
1. Worn bearing.
1. Replace bearing.
2. Insufficient lubrication
2. Increase lubrication rate
3. Impeller contacting housing
3. Check internal clearances
4. Drive misalignment
4. Realign and retension drive.
5. Excessive liquid carryover.
5. Drain all points.
6. Impeller blade damaged.
6. Repair and rebalance, or replace impeller.
7. Foreign matter attached to impeller blade 7. Remove foreign object, repair impeller &
rebalance, or replace impeller.
Abnormal noise, vibration or
periodic knocking
8. Impeller loose.
8. Tighten impeller.
1. Slow speed.
1. Correct speed.
2. Improper belt tension.
2. Adjust belt tension.
3. Sticking relief valve.
3. Clean and replace.
4. Dirty inlet filter
4. Clean and replace.
5. Impeller blade damaged.
5. Repair and rebalance, or replace impeller.
Pressure cannot be built up or
only up to a certain extent.
6. Leak in pipework.
6. Repair pipework.
1. Improper belt tension.
1. Adjust belt tension.
Slipping of belts
2. Worn belt.
2. Replace with new ones.
1.Overloading of motor due to excessive
working pressure.
1. Lower working pressure.
2. Worn bearings
2. Replace bearings.
3. Poor ventilation
3. Check motor vent openings.
4. Unbalanced voltage supply.
4. Check voltage and current.
Overheating of electric motor
5. Starting too frequently.
5. Reduce amount of starts.
1. Breakdown of electric current
1. Contact power company.
2. Malfunction of motor.
2. Check motor.
3. Wrong motor connections.
3. Check electrical connections.
4. Motor fuse blown
4. Replace fuse.
Machine does not start
5. Motor tripped on overload.
5. Reset overload.
1. Faulty bearing
1. Replace bearing.
2. Foreign particles in machine.
2. Disassemble machine and remove foreign
particles.
Shaft partially or totally locked
3. Machine seized.
3. Repair machine.
Troubleshooting
To Dismantle
A
