Trouble Shooting; Description Of Parts - Tsurumi Pump KTV 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.
Bearing Grease (only LH with more than 55kW):
Remove grease plug {55-75kW (PT 1/8)}, {90-110kW (M12 screw)} and pour in grease according to the table and drawing below.
LH pumps with 90-110kw have an upper and lower bearing, Upper grease plug PT1/4, lower grease plug as above.
Note: Replenishment period is 3000 hours. However it may vary according to operating conditions.
Model kind of grease
e.g. Multemp LRL3
LH855
LH675
LH875
LH690 e.g. Multi Knock Delux
LH890 Grease (Nisseki)
LH6110
LH8110
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.
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.
causing the motor
• Voltage too low (most common cause); check supply voltage under load.
protector to actuate
• If voltage is from diesel generator, inexact frequency.
• Wrong direction of rotation.
• Liquid of too 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 lower
• 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 exploded view in appendix)
Initial quantity Replenishment
100g
(Kyodo)
100g
200g

Trouble shooting

• Check that voltage applied agree 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 motor 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 disuse).
No.
1 Hexagonal bolt
2 Spring washer
3 Mechanical seal
4 Oil ring
5 Rounded head screw
6 O-ring
7 Packing (Gasket)
8 Oil casing
9 Packing (Gasket)
10 Oil plug
11 Spring washer
NOTE!
Old oil should be entrusted to an oil disposal company in accordance with
local regulations.
The gasket and the O-ring for the oil filler plug must be replaced with a new
part at each oil inspection and change.
50g
30g
Grease Plug
60g
O-Ring
Replacing the impeller
CAUTION!
A worn impeller often has sharp edges. Take care not to cut
yourself on them.
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.
12 Hexagonal bolt
13 Shaft sleeve
14 Pump casing
15 Spring washer
16 Hexagonal bolt
17 O-ring
18 Labyrinth ring
19 Impeller adjusting washer
20 Impeller
21 Impeller thread protective cover
22 Hexagonal nut
5
Bearing
Bearing Housing
Part Name No.
23
24
25
26
27
28
29
30
31
32
33
Part Name
Impeller nut
Suction cover packing (gasket)
Suction cover
Spring washer
Hexagonal bolt
Spring washer
Stud bolt
Strainer
Bottom plate
Spring washer
Hexagonal bolt