HAYWARD GORDON LTD
Page
11
Rev:
1
HRF Series Mixers
Date 11/99
Section: RF
TROUBLE SHOOTING
The mixer should be checked often for abnormal temperatures, oil leaks, abnormal noise,
vibration etc. In the event of difficulties, the unit should be shut down immediately. The following
trouble shooting table should be reviewed and if no solution is obvious, contact Hayward Gordon
Limited.
TROUBLE
WHAT TO INSPECT
ACTION
OVERHEATING
1. Motor Overload
a) Determine whether specific gravity or viscosity of
the process has changed from that originally
anticipated.
b) Inspect impeller for material build-up.
c) Have additional baffles been added to the vessel,
or the size of the baffles increased.
d) Check for proper impeller rotation, as shown on
certified print.
e) See NOISE (Below)
2. Is oil level to low?
Check oil level to see that housing is filled with
lubricant to the specified level.
3. Breather
Breather must be open and clean. Clean breather
regularly in a solvent.
4. Grade of oil
Oil must be of a grade specified in lubrication
instructions. If it is not, flush unit and refill with correct
grade.
5. Condition of oil
Check to see if oil is oxidized, dirty, or of high sludge
content.
Change oil.
6. Stuffing Box (if supplied)
Stuffing box gland must not be over-tightened. See
"Packing Procedure" for proper packing and break-in.
(Included if applicable.)
NOISE
1. Inspect impellers
Be sure clearance between impeller and any in-tank
construction (including tank walls for anchors,
scrapers, etc) is sufficient to permit unhindered
rotation.
2. Worn or improperly installed or
maintained couplings.
Couplings can generate noise which seems to
emanate from gear case. Check for proper
lubrication, alignment, or worn parts.
3. Are bearings and gears exposed
to an abrasive substance e.g., dusty
atmosphere?
Abrasive substance will cause excessive gear and
bearing wear. Make necessary provisions to prevent
entrance of abrasive substance. Clean and flush drive
thoroughly and refill with new oil. Revise maintenance
practices to include more frequent changes.
4. Structure amplification
Steel mounting structures often act as a diaphragm
and amplify small amounts of normal noise into
excessive noise. This can only be corrected by
adding additional stiffness to the structure.
