Viking Pump TSM141.2: LS-M 125/4125 - Manual (Page 4)

SECTION TSM 141.2 ISSUE F PAGE 4 OF 12
1. Mark head and casing before disassembly to insure
proper reassembly. The idler pin, which is offset in pump
head, must be positioned toward and equal distance
between port connections to allow for proper flow of
liquid through pump.
Remove head from pump.
Do not allow idler to fall from
idler pin. Tilt top of head back when removing to prevent
this. Avoid damaging head gasket. If pump is furnished
with pressure relief valve, it need not be removed from
head or disassembled at this point. Refer to Pressure
Relief Valve Instructions, page 11.
If LS pump has jacketed head plate, it will separate from
head when it is removed. The gasket between head and
jacket head plate must be totally removed. Use new
gasket when assembling pump.
2. Remove idler and bushing assembly.
3. Insert length of hardwood or brass through port opening
between rotor teeth to keep shaft from turning. Bend up
tang of lockwasher and with a spanner wrench remove
locknut and lockwasher from shaft.
4. Remove packing gland nuts.
5. Tap shaft forward approximately 0.5 inch and remove pair
of half round rings under inner bearing spacer collar.
6. Carefully remove rotor and shaft to avoid damaging
bracket bushing.
7. Remove packing gland from side of bracket.
8. Loosen four setscrews over the inner and outer end caps.
Remove both end caps with lip seals, spacer collars and
ball bearing. Refer to figure 5, page 11.
The inner cap can be removed through side opening of
the bracket.
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.
EXPLODED VIEW fOR MODELSQ, QS AND M125
ITEM NAME Of PART ITEM NAME Of PART ITEM NAME Of PART
1 Locknut 13 Bracket Bushing 25 Idler Bushing
2 Lockwasher 14 Bracket and Bushing 26 Head Gasket
3 End Cap (Outer) 15 Grease Fitting 27 Idler Pin
4 Lip Seal for End Cap 16 Capscrew for Bracket 28 Head and Idler Pin
5 Bearing Spacer Collar 17 Bracket Gasket 29 Stud for Head
6 Ball Bearing 18 Nut for Flanges 30 Nut for Head
7 End Cap (Inner) 19 Stud for Flanges 31 Relief Valve Gasket
8 Packing Gland 20 Casing (QS size has opposite ports) 32 Capscrew for Relief Valve
9 Packing Gland Nut 21 Pipe Flange Gasket 33 Internal Relief Valve
10 Packing Gland Capscrew 22 Pipe Plug Suckback Line, Not Illustrated
11 Packing 23 Rotor and Shaft
12 Packing Retainer Washer 24 Idler and Bushing