REMKO RT 080, Руководство оператора, Страница: 18 / 40

12. BEARING TEMPERATURE CHECK
Bearings normally run at higher than ambient temperatures because of heat generated
by friction. Temperatures up to 71º C are considered normal for bearings, and they can
operate safely to at least 82º C.
Checking bearing temperatures by hand is inaccurate. Bearing temperatures can be
measured accurately by placing a contact-type thermometer against the housing.
Record this temperature for future reference.
A sudden increase in bearing temperature is a warning that the bearings are at the
point of failing to operate properly. Make certain that the bearing lubricant is of the
proper viscosity and at the correct level (see
LUBRICATION in MAINTENANCE AND
REPAIR).
Bearing overheating can also be caused by shaft misalignment and/or excessive
vibration.
When pumps are first started, the bearings may seem to run at temperatures above
normal. Continued operation should bring the temperatures down to normal levels.
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11. STOPPING
Never halt the flow of liquid suddenly. If the liquid being pumped is stopped abruptly,
damaging shock waves can be transmitted to the pump and piping system. Close
all connecting valves slowly.
On engine driven pumps, reduce the throttle speed slowly and allow the engine to idle
briefly before stopping.
If the application involves a high discharge head, gradually close the
discharge throttling valve before stopping the pump.
CAUTION!
Do not operate the pump against a closed discharge throttling valve
for long periods of time. If operated against a closed discharge
throttling valve, pump components will deteriorate, and the liquid
could come to a boil, build pressure, and cause the pump casing to
rupture or explode.
WARNING!
After stopping the pump, lock out or disconnect the power source to ensure that the
pump will remain inoperative.
Cold Weather Preservation
In below freezing conditions, drain the pump to prevent damage from freezing. Also,
clean out any solids by flushing with a hose. Operate the pump for approximately one
minute; this will remove any remaining liquid that could freeze the pump rotating parts.
If the pump will be idle for more than a few hours, or if it has been pumping liquids
containing a large amount of solids, drain the pump, and flush it thoroughly with clean
water. To prevent large solids from clogging the drain port and preventing the pump
from completely draining, insert a rod or stiff wire in the drain port, and agitate the liquid
during the draining process. Clean out any remaining solids by flushing with a hose.