Viking Pump TSM141.2: LS-M 125/4125 - Manual (Page 11)

SECTION TSM 141.2 ISSUE F PAGE 11 OF 12
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.
fIgURE 14
Size LS
PRESSURE RELIEf VALVE
INSTRUCTIONS
LIST Of PARTS
1. Valve Cap 6. Valve Body
2. Adjusting Screw 7. Valve Spring
3. Lock Nut 8. Poppet
4. Spring Guide 9. Cap Gasket
5. Bonnet 10. Bonnet
When installing carbon graphite bushings, extreme care
must be taken to prevent breaking. Carbon graphite is a
brittle material and easily cracked. If cracked, the bushing will
quickly disintegrate. Using a lubricant and adding a chamfer
on the bushing and the mating part will help in installation.
The additional precautions listed below must be followed for
proper installation:
1. A press must be used for installation.
2. Be certain bushing is started straight.
3. Do not stop pressing operation until bushing is in proper
position. Starting and stopping will result in a cracked
bushing.
4. Check bushing for cracks after installation.
Carbon graphite bushings with extra interference fits are
frequently furnished for high temperature operation. These
bushings must be installed by a shrink fit.
1. Heat bracket or idler to 750 °F.
2. Install cool bushings with a press.
3. If facilities are not available to reach 750 °F. temperature,
it is possible to install with 450 °F. temperature; however,
the lower the temperature, the greater the possibility of
cracking bushing.
Consult factory with specific questions on high temperature
applications. Refer to Engineering Service Bulletin ESB-3.
INSTALLATION Of CARBON
gRAPHITE BUSHINgS
fIgURE 15
Sizes Q, QS and M