SAMCO CP7, Instructions Manual

Page: 26 / 61

26
OVERHEATING OF THE BEARINGS.
Remove vent plugs for the first 24 hours of operation after regreasing.
Bearing temperature:
Normally the maximum desirable operating temperature for ball bearings is 82°C as measured on the
bearing housing. Should the temperature of the bearing frame rise above the limit, the pump should be
shut down to determine the cause. A bearing frame which feels hot to the touch of the hand is not
necessarily running hot. Check with an accurate temperature measuring device to be sure.
For high temperature service, optional frame cooling is available. The cooling device can be installed into
the frame without disassembling the frame. This requires up to 114
l/ hr of external cooling water.
2. COUPLINGS:
Flexible couplings provide smooth transmission of power. There is no rubbing action of metal against
rubber to cause wear. Couplings are not affected by abrasives, dirt, or moisture. This eliminates the need
for lubrication or maintenance, and provides clean and quiet performance.
Grid or gear tooth couplings are initially lubricated with Long Term Grease (LTG) and do not require
relubrication for up to three years. If couplings leak grease, are exposed to extreme temperatures, or
excessive moisture more frequent lubrication may be required.
Use coupling manufacturer's recommended grease to provide trouble free performance.
If other types of couplings are used, follow maintenance instructions of coupling manufacturer.
D. SEAL INFORMATION:
1. Packing:
The standard pump packing is made from acrylic yarn impregnated with petroleum lubricants and
graphite.
A soft, well-lubricated packing reduces stuffing box resistance and prevents excessive wear on the shaft
and sleeve. Many brands of packing on the market have the desired qualities. For specific
recommendations, consult your S.A.M. Engineering Pump Sales Representative.
When a pump with fibre packing is first started it is advisable to have the packing slightly loose without
causing an air leak. As the pump runs in, gradually tighten the gland bolts evenly. The gland should never
be drawn to the point where packing is compressed too tight and no leakage occurs. This will cause the
packing to bum, score the shaft sleeve and prevent liquid from circulating through the stuffing box
cooling the packing. The stuffing box is improperly packed or adjusted if friction in the box prevents
turning the rotating element by hand. A properly operated stuffing box should run lukewarm with a slow
drip of sealing liquid. After the pump has been in operation for some time, and the packing has been
completely run-in, drippage from the stuffing box should be at least 40 to 60 drops per minute. This will
indicate proper packing and shaft sleeve lubrication and cooling.
NOTE: Runout on the shaft sleeve could result in excess leakage that cannot be compensated for.
Correction of this defect is very important.
Packing should be checked frequently and replaced as service indicates. Six months might be a
reasonable expected life, depending on operating conditions. It is impossible to give any exact
predictions. A packing tool may be used to remove all old packing from the stuffing box. Never reuse old
and lifeless packing or merely add some new rings. Make sure the stuffing box is thoroughly cleaned