Viking Pump TSM151.2: LS-M 123/4123 - Manual (Page 13)

PRESSURE RELIEF VALVE
INSTRUCTIONS
FIGURE 13
SIZE LS
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
SECTION TSM 151.2 ISSUE B PAGE 13 OF 14
FIGURE 14
SIZE Q, QS AND M
DANGER
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 THE ABOVE LISTED
PRECAUTIONARY MEASURES MAY RESULT
IN SERIOUS INJURY OR DEATH.
Mark valve and head before disassembly to insure proper
reassembly.
1. Remove valve cap.
2. Measure and record length of extension of adjusting
screw. Refer to “A” on Figures 13 and 14.
3. Loosen locknut and back out adjusting screw until
spring pressure is released.
4. Remove bonnet, spring guide, spring and poppet from
valve body. Clean and inspect all parts for wear or
damage and replace if necessary.