Viking Pump TSM141.1: G-LL 125/4125 - Manual (Page 15)

SECTION TSM 141.1 ISSUE E PAGE 15 OF 16
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 Figures 17, 18 and 19.
3. Loosen the locknut and back out the adjusting screw
until the 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.
Reverse the procedures outlined under Disassembly. If the
valve is removed for repairs, be sure to replace in the same
position. Relief valve adjusting screw cap must always point
towards the suction side of the pump. If pump rotation is
reversed, remove the relief valve and turn end for end. Refer
to Figures 1, 2 , 3 and 4, page 1.
ASSEMBLY
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.
DANgER !
Before starting pump, be sure all drive
equipment guards are in place.
Failure to properly mount guards may
result in serious injury or death.
PRESSURE RELIEF VALVE
INSTRUCTIONS
FIgURE 17
Sizes G, H and HL
FIgURE 18
Sizes AK and AL
FIgURE 19
Sizes K, KK, L, LQ and LL
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