Service And Maintenance - Tsurumi Pump KTD Serie Instructions De Démarrage Et D'utilisation

CAUTION!
Before any work is started, check that the pump is isolated
from the power supply and cannot be energized.
Note:
In the appendix is the sectional drawimg of a model of the KTZ-series that is
representative for the majority of our pumps.
Due to the large number of different models we have to ask you to contact your
Tsurumi dealer if you need a parts list or a drawing of a certain model.
If the pump will not be operated for a long period of time, pull the pump up, allow
it to dry, and store it indoors.
If the pump remains immersed in water, operate the pump on a regular basis (i.e.
once a week) to prevent the impeller from seizing due to rust.
In one application, a pump can be under constant risk, and even with frequent attention may have a short life. In another application a pump can run for years without
any maintenance at all. Recommendations as to intervals, need interpretation, with the most hazardous characteristic in mind. At least superficial periodic inspection
is needed in order to maintain a certain level of reliability and safety.
Interval
Monthly
Once every 2 to 5 years
Periodical inspection and
replacement of lubricant
Choking:
Access of the water to the pump and apparent discharge capacity obviously need to be checked as often as experience dictates. Suspending the pump at the ideal
level, if need be from a raft, is the main thing. Basically, the strainer should be free and if the pump is meant to remove water it should not carry more sand and
pebbles than necessary.
The inlet should be protected from solids, if occurring in sufficient quantity to block the holes of the strainer, preventing flow. A cage, pierced drum or mesh can help.
Flow can in rare cases also be stopped by quantities of small stringy vegetal matter wrapping itself around the impeller blades.
Sand wears out the suction cover (wear plate) and shaft seal of any pump. This wear is roughly proportional to the square of the pressure, so it can be worth while
using an extra large diameter delivery hose or pipe; very rarely will this lead to settling of sand or pebbles unless high concentration, an obstructed strainer, worn
impeller, increased head or a constricted delivery conduit have resulted in diminished flow. If the pump is to remove water, often it can be placed on a raised object
or suspended from masonry, piles or an improvised raft. If a pump buries itself in earth, or is buried by a landslide, it can be ruined in minutes.
Generating Set:
Hz to be within ±1 Hz, and voltage within ±5%, may also need to be checked frequently, if power is provided by a generating set. The lighter the generating set, the
higher the risk of erratic voltage and wrong frequency.
Insulation Check:
Less obvious than oil inspection but equally valuable, is a periodic check of insulation value between the pump cable´s earth lead and the other leads, and between
the other leads, by means of an insulation tester. This value, well over 20 M Ohm when the pump is new or reconditioned, should be at least 1 M Ohm when the
pump and its cable have been in the water for a long time. If it is down to 1M Ohm, repair in a workshop is urgently needed. It is useful to keep a record of
measurements of this insulation value, and of ampere draw if possible, over the years, so as to notice a steep decline of the ohm value before a short occurs in the
motor winding. Decreased ampere draw indicates impeller wear.
On workshop inspection, if it is found that the cable is at fault, it should not be re-used, even if 30 M Ohm insulation can be restored. If the motor is at fault, the
winding specialist can opt for ovendrying and revarnishing under vacuum, or in a favourable case drying only. In the latter case, dry at no more than 60°C with motor
protector still fitted or at not more than 105°C with motor protector removed. In case of oven drying, insulation should be higher than 5 M Ohm when hot or 20 M
Ohm when cooled down.
Oil:
Replace the oil also if it is slightly greyish or contains a droplet of water. Ensure that electric power cannot be accidentally applied to the pump. Lay the pump on its
side, remove the plug, holding a piece of cloth over it to prevent possible spraying. If the oil is greyish or contains water drops or dust, or if there is less than 80% of
the recommended quantity left, then measure carefully at the cable´s end (never open the motor outside a workshop) the ohm resistance between the leads and
replace shaft seal to avoid humidity getting into the motor and shorting the windings. Use turbine oil (ISO VG32).
Use the quantity specified in the specification table. Dispose of old oil in accordance with local regulations. Carefully check the packing (gasket) of the filling plug and
replace.

Service and Maintenance

1. Measuring insulation resistance
2. Measuring the loaded current
3. Measuring the power supply voltage
4. Inspecting the impeller
Overhaul
KTV2-50, KRS2-50/80/100:
Inspection: Every 2000 hours of running time or every 6 months, whichever comes first
Changing interval: Every 4000 hours of running time or every 12 months , whichever comes first.
Other models:
Inspection: Every 3000 hours of running time or every 6 months, whichever comes first.
Changing Interval: Every 4000 hours of running time or every 12 months, whichever comes first
Remove any debris attached to the pump´s outer surface, and wash the pump
with tap water. Pay particular attention to the impeller area, and completely
remove any debris from the impeller.
Verify that the paint is not peeled, that there is no damage, and that the bolts and
nuts have not loosened. If the paint has peeled, allow the pump to dry and apply
touch-up paint.
WARNING!
Never insert your hand or any other object into the inlet
opening on the underside of the pump casing when the pump
is connected to the power supply.
Before inspecting the pump casing, check that the pump has
been isolated from the power supply and cannot be energized.
Make sure that the pump is completely reassembled before putting into
operation again. Take care that bystanders keep a safe distance to the
conduit or switch gear and avoid contact with the water.
Inspection Item
Insulation resistance reference value = 20M Ohm
NOTE:
The motor must be inspected if the
insulation resistance is considerably
lower than that obtained during the last
inspection
To be within the rated current
Power supply voltage tolerance=±5% of rated voltage
If the performance level has decreased considerably,
the impeller may be worn.
The pump must be overhauled even if the pump
appears normal during operation. The pump may
need to be overhauled earlier if it is used continuously
or repeatedly.
4
NOTE:
Contact your Tsurumi-dealer to overhaul
the pump.