Viking Pump TSM142.2: LS-M 225/4225 - Manual (Page 6)

SECTION TSM 142.2 ISSUE E PAGE 6 OF 14
DISaSSEMBlY
DaNgER !
Before opening any Viking pump liquid
chamber (pumping chamber, reservoir,
relief valve adjusting cap fitting, etc.)
Be sure:
1. That any pressure in the chamber has
been completely vented through the
suction or discharge lines or other
appropriate openings or connections.
2. That the driving means (motor,
turbine, engine, etc.) has been “locked
out” or made non-operational so that
it cannot be started while work is
being done on pump.
3. That you know what liquid the
pump has been handling and the
precautions necessary to safely
handle the liquid. Obtain a material
safety data sheet (MSDS) for the
liquid to be sure these precautions
are understood.
Failure to follow above listed
precautionary measures may result in
serious injury or death.
1. Mark head and casing before disassembly to make sure
they are reassembled properly. Remove the head from
the pump.
CAUTION: DO NOT ALLOW THE IDLER TO FALL
FROM THE IDLER PIN.
Tilting the top of the head back as it is removed will
prevent this occurrence. Avoid damaging the head gasket
if possible. If pump is furnished with a relief valve, it need
not be removed from head or disassembled at this point.
Refer to “Pressure Relief Valve Instructions”, page
13. If the pump has a jacket head plate, this plate will
separate from the head when the head is removed from
the pump. The gasket for jacket head plate between
the head and the jacket head plate should be removed
and the gasket surfaces on the above parts cleaned.
Disassembly will probably require replacement of the
gasket for jacket head plate between the pump head and
jacket head plate.
These gaskets should be carried as spare parts for
pumps thus equipped.
2. Remove the idler and bushing assembly.
3. Bend up tang of lockwasher and with a spanner wrench
remove the locknut and lockwasher from the shaft.
NOTE: A piece of hardwood or brass inserted in casing
port and between rotor teeth will prevent the shaft from
turning.
4. Remove the packing gland nuts.
gREaSE FITTINg lOCaTION
INNER SPaCER COllaR
OUTER SPaCER COllaR
lOCKWaSHER
SETSCREWS
OUTER END CaP
lOCKNUT
INNER lIP SEal
HalF ROUND RINgS
INNER END CaP
NYlON INSERT
SHaFT
Ball BEaRINg BRaCKET
OUTER lIP SEal
FIgURE 4