Trouble Shooting - Tsurumi Pump B Serie Instrucciones De Funcionamiento

CAUTION!
In the event of inward leakage, the oil housing may be
pressurized. When removing the oil plug, hold a piece of cloth
over it to prevent oil from splashing.
CAUTION!
Before disassembling and reassembling the pump, be sure
that the power supply is disconnected, and remove the
cabtyre cable from the terminal board. To prevent serious
accidents, do not perform a conduction test during disassembly and
reassembly.
CAUTION!
A worn impeller often has sharp edges. Take care not to cut
yourself on them.
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 and avoid
contact with the water.
CAUTION!
To prevent serious accidents, disconnect the power supply
before inspecting the pump.
Pump is new or has been repaired and tested
Pump fails to start
Pump has been satisfactorily in use
• Motor windings or cable damaged. Do not open motor. Check as above.
Pump starts but
• Impeller blocked or choked.
stops immediately,
• If pump is new, wrong voltage or frequency.
motor protector
• Voltage too low (most common cause); check supply voltage under load.
actuates
• If voltage is from diesel generator, inexact frequency.
• Wrong direction of rotation.
• Liquid of excessive high viscosity or density.
• Wrong setting of thermal overload unit.
• Wrong direction of rotation.
The pump´s head
• Piping resistance too high.
and pumping
• Impeller worn, partially choked or severely narrowed by hard deposits.
volume is low
• Strainer or inlet blocked.
• Pump draws air, or liquid is partly volatile or contains high level of gas in solution.
• Wrong direction or rotation.
The pump
• Solid object (stone, etc. ) in volute.
generates noise or
• Impeller severely damaged, or bearing damaged. Repair at once.
vibration
• Pump lying on its side and drawing a little air. High wear rate likely.
Description of parts (see sectional drawing in appendix):
No. Part Name
1
Cabtyre Cable
20
Pump Casing
21 Impeller
22 Suction Cover
23 Strainer Stand
25 Mechanical Seal
26
Oil Seal
Replacing the impeller

Trouble shooting

• Check that voltage applied agrees with rating plate.
• Check at pump cable free end (never open motor) insulation value of earth lead (over 20M
Ohm), and continuity of winding. On three phase motors check whether ohm values of
three windings are within ±10%.
• Same as above except that also impeller needs to be checked (stone, debris, rust between impeller
blades and suction cover after long periods out of use).
No.
35 Oil Plug
36 Lubricant
37 Discharge Bend
46 Air Release Valve
48
Screwed Flange
52A Upper Bearing
52B Lower Bearing
NOTE!
Old oil should be entrusted to an oil disposal company in accordance with
local regulations.
The Packing (Gasket) and the O-ring for the oil plug must be replaced with
a new part at each oil inspection and change.
CAUTION!
Be sure to perform a trial operation when starting the pump
after a reassembly. If the pump was assembled improperly, it
may lead to abnormal operation, electrical shock, or water
damage.
Removal of the suction cover (wear plate) and especially removal of the impeller,
and even more so the shaft sealing, must be left to a mechanic. Show him the
sectional view.
If the pump has a strange smell or appearance, have it cleaned professionally
before the mechanic touches it.
When reassembling, the mechanic will turn the impeller by hand to check that it
turns freely and that there is no ticking or grating noise from a bearing. Impellers
that are not of the vortex type, have a clearance with respect to the suction cover
(wear plate) of about 0,3 to 0,5 mm when new or repaired.
Read this Operation Manual carefully before requesting repair. After re-inspecting
the pump, if it does not operate normally, contact your Tsurumi-dealer.
Part Name No.
53
54
55
56
60
64
5
Part Name
Motor Protector
Shaft
Rotor
Stator Complete
Bearing Housing
Motor Frame