Tsurumi Pump LSC Series User manual

LSC series
OVERHAUL MANUAL
1

Release from Liability
Upon reading this, the user of the respective Tsurumi product and Overhaul Manual acknowledges and
understands Tsurumi Europe shall not be held liable for any user injury that occurs during the inspection
and disassembly/assembly of the product.
The users also acknowledge that they will be held responsible for any damage or destruction inflicted onto
the product, and/or for the loss of parts during inspection and self-performed maintenance.
No part of this publication may be reproduced in any form or by any means without expressed written
permission from Tsurumi Europe.
2

OVERHAUL MANUAL
LSC1.4S-51 | LSCE1.4S-51
The following is a guideline for the overhaul of the 0.48kW Tsurumi LSC Series submersible pumps.
Use this guide, along with the parts list, exploded view diagram, and operation manual for your particular pump model to
disassemble, inspect, and rebuild your pump to factory conditions.
The ‘E’ in LSCE refers to the optional sensor unit with electric probes used to sense water level for automatic operation.
If upon the overhaul, a pump component requires replacement, use only Tsurumi replacement parts.
Replacement parts can be purchased through our dealers and distributors network.
If there are any questions, feel free to contact us at [e-mail].
3
LSC
Manual type LSCE Automatic type

Exploded View
(Reference: LSC1.4S-51)
4

Sections
•Insulation Resistance Testing Page 7
•Inspect Pump Discharge Page 10
•Inspect Wet End for Wear Page 14
•Inspect Oil Chamber Page 19
•Inspect Mechanical Seal Page 21
•Motor Inspection Page 30
•Pump Re-Assembly Page 38
5

Tools Required
6

Electrical Testing
Perform proper electrical testings. Please refer to the operation manual.
All electrical work must be performed by an authorized electrician only in
compliance with local electrical equipment standards and internal wiring codes.
Never allow an unauthorized person to perform electrical work because it is not
only against the law, but it can also be extremely dangerous.
7

8
Cable Inspection
Measure and inspect pump cable.
If there are any cuts or other deformities in the
cable, or the cable is less than the original
length, the cable should be replaced.
Inspect cable plug for damage and ensure that
grounding prong is intact for safe operation.

9

Inspect Pump Discharge
If your pump motor is running but is not performing as new, there could
be foreign debris stuck at the pump end or beneath the outer cover, or
leaking from the discharge flange or packing (gaskets).
10

Prepare for Disassembly
With a paint pen or marker, make orientation marks on the strainer, oil casing,
and outer cover to ensure proper orientation upon re-assembly.
11

Remove the handle.
Then, remove the two bolts securing the cable
gland to the outer cover. Carefully wiggle the
cable assembly out of the motor casing and
inspect the connections.
If there is oil and/or water present in this area,
the motor assembly will need to be
disassembled for inspection and repair.
12
Motor Casing
Visual Inspection

Disconnect the three bullet connectors that
connect the cable to the motor stator.
Set the cable aside.
Remove the outer cover.
A deformation in the outer cover can cause
water to leak at these points, reducing
performance. These components should be
replaced if damaged.
Inspect the packing for any excessive wear or
damage. Replace as necessary.
13
Bullet Connectors
(Disconnected)
Outer Cover
Packing
Outer Cover Disassembly

Inspect Pump Casing for
Wear and/or Debris
If your pump motor is running but is not performing as new, there could
be wear to the impeller and wear plate or foreign debris stuck in the
strainer or pump casing.
14

Remove Lower Portions
To begin removal of the bottom plate (strainer),
remove the hex bolts and plain washers from the
bottom plate; best performed with the pump stood
upside-down.
15
Strainer
(Bottom Plate)
Pump Casing
Stand

Bottom Plate
Once the bottom plate is removed, the swing check valve
may be inspected and removed if necessary.
If the swing check valve exhibits any excessive wear or
damage, this could greatly affect the pump’s performance
and should be replaced.
16
Bottom Plate
Swing Check Valve

Remove Lower Portions
Remove the hex bolts and their plain washers
to remove the stand.
Remove the suction cover by lifting it off from
the pump casing.
Remove the pump casing. It may be necessary
to use a screwdriver to gently loosen the pump
casing from its position.
Inspect all components for any excessive wear
or damage, and replace as necessary.
17
Stand
Suction Cover
Pump CasingSuction Cover

Remove Impeller
Remove the impeller by unscrewing the hex cap nut,
the spring washer and plain washer.
It may be necessary to hold the impeller with pliers.
Lift the impeller off the rotor.
Remove the shaft sleeve and V-ring by sliding them
off the rotor. Then remove the wear ring.
Inspect all components for excessive wear or
damage and replace as necessary.
If further disassembly on this end of the pump is
required, it will be necessary to drain the pump’s oil
before proceeding.
18
Wear Ring
Impeller
Shaft Sleeve
w/ V-Ring

Inspect Oil Chamber
It is recommended to inspect the oil every 6 months of operation.
If there is water in the oil chamber or the oil level is low, this is evidence
of a worn mechanical seal, which should be replaced before irreparable
damage or bodily injury occurs.
19

Drain and Inspect Oil
To drain the oil, remove the oil plug and its
packing, located on the side of the oil casing.
Oil casing may be under pressure, so be sure to
wear eye protection, and shield the oil from
spraying everywhere.
Drain the oil into a clear, graduated container.
Inspect oil and record volume. There should be
155 ml of clean oil in the oil chamber. Water or
foreign debris in the oil indicate that the
mechanical seal has leaked and needs to be
replaced. If the oil contains no water, simply
replace with fresh oil and reassemble unit.
If further disassembly will be performed, insert
the oil plug and packing back into position and
tighten it in order to prevent any remaining oil
from dripping out.
20
Oil Plug