Viking Pump TSM341.1: SG Mag Drive Series - Manual (Page 16)

SECTION TSM 341.1 ISSUE J PAGE 16 OF 19
6. Install the inboard drive key, then slide the magnet onto
the shaft. Locate the outer magnet per dimension “A”
listed below. Tighten the two setscrews to lock into
proper position. See Figure 24, page 13.
Pump Design “A” Dim.
U.S. Inch Design 10.43 inches
Metric Design 265 mm
“C” Coupling
Outer Magnet
Location Dimension
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.
VALVE - 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
PRESSURE RELIEF VALVE
INSTRUCTIONS
FIGURE 26
DISASSEMBLY – RELIEF VALVE:
Mark the valve and head before disassembly to ensure
proper reassembly.
1. Remove the valve cap.
2. Measure and record the length of extension of the
adjusting screw. Refer to “A” on Figure 26.
3. Loosen the locknut and back out the adjusting screw until
spring pressure is released.
4. Remove the bonnet, spring guide, spring and poppet from
the valve body. Clean and inspect all parts for wear or
damage and replace as necessary.
ASSEMBLY – RELIEF VALVE:
Reverse the procedures outlined under DISASSEMBLY –
RELIEF VALVE. If the valve is removed for repairs, be sure
to replace in the original position. The relief valve adjusting
screw cap must always point towards the suction side of
the pump. If the pump rotation is reversed, remove the relief
valve and turn end for end.
PRESSURE ADJUSTMENT:
If a new spring is installed or if pressure setting of pressure
relief valve is to be changed from that which the factory has
set, the following instructions must be carefully followed.
1. Carefully remove valve cap which covers adjusting screw.
Loosen locknut which locks adjusting screw so pressure
setting will not change during operation of pump.
2. Install a pressure gauge in discharge line for actual
adjusting operation.
3. Turn adjusting screw in to increase pressure and out to
decrease pressure.
4. With discharge line closed at point beyond pressure
gauge, gauge will show maximum pressure valve will
allow while pump is in operation.
TROUBLE SHOOTING
A Viking pump that is properly installed and maintained will
give long satisfactory performance.
If trouble does develop, one of the first steps toward finding
the difficulty is to install a vacuum gauge in the suction line
and a pressure gauge in the discharge line. Readings on
these gauges often give a clue on where to start looking for
trouble.
Vacuum Gauge - Suction Port
High vacuum reading would indicate:
1. Suction line is blocked, a valve is closed, a strainer is
plugged or a pinched suction hose.
2. Suction line is too small.
3. Liquid is too viscous to flow through piping.
4. Lift required too high.
Low reading would indicate:
1. Air leak in the suction line.
2. The end of pipe is not in the liquid.
3. The pump is worn.