Viking Pump TSM635.3: Q-QS Universal Mag Drive - Manual (Page 11)

SECTION TSM 635.3 ISSUE C PAGE 11 OF 13
FIGURE 20
PRoCEDURE B
FEELER GAUGE
CASING
HEAD
PRESSURE RELIEF VALVE
INSTRUCTIoNS
Before opening any Viking pump liquid
chamber (pumping chamber, reservoir, relief
valve adjusting cap fitting etc.) Be sure:
1. That any pressure in chamber has been
completely vented through 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.
DANGER !
FIGURE 21
VALVE – Q AND QS SIZES
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 10. Bonnet Gasket
DISASSEMBLY – RELIEF VALVE
Mark the valve and head before disassembly to insure
proper reassembly.
1. Remove the valve cap.
2. Measure and record the length of extension of the
adjusting screw. Refer to “A” on Figure 21.
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. Refer to Figure 2, page 3.
PROCEDURE B:
If the pump is in line and ports are not accessible, remove the
head and shims. Put the head back on (without shims) and
measure the gap as shown, see Figure 20. After determining
the gap between the head and casing, select a combination
of shims equal to the measured gap plus the desired end
clearance. Remove head, install shims then install head.
Tighten the head capscrews and check the pump clearance
by making sure the pump turns freely by hand.