Mark valve and head before disassembly to insure proper reassembly.
Remove valve cap.
Measure and record length of extension of adjusting screw.
Refer to "A" on Figures 15 and 16.
Loosen locknut and back out adjusting screw until spring
pressure is released.
Remove bonnet, spring guide, spring and poppet from valve
body. Clean and inspect all parts for wear or damage and
replace as necessary.
Reverse procedures outlined under Disassembly. If valve is removed
for repairs, be sure to replace in same position. Relief valve adjusting
screw cap must always point towards suction side of pump. If pump
rotation is reversed, remove relief valve and turn end for end. Refer to
Figures 1, 2, and 3, page 1.
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.
Carefully remove valve cap which covers adjusting screw.
Loosen locknut which locks adjusting screw so pressure
setting will not change during operation of pump.
Install a pressure gauge in discharge line for actual
Turn adjusting screw in to increase pressure and out to
With discharge line closed at a point beyond pressure
gauge, gauge will show maximum pressure valve will allow
while pump is in operation.
In ordering parts for pressure relief valve, always give model number
and serial number of pump as it appears on nameplate and name of
part wanted. When ordering springs, be sure to give pressure setting
Viking warrants all products manufactured by it to be free
from defects in workmanship or material for a period of one (I) year
from date of startup, provided that in no event shall this warranty
extend more than eighteen (18) months from the date of shipment
from Viking. If, during said warranty period, any products sold by
Viking prove to be defective in workmanship or material under normal
use and service, and if such products are returned to Vikings factory
at Cedar Falls, Iowa, transportation charges prepaid, and if the
products are found by Viking to be defective in workmanship or
material, they will be replaced or repaired free of charge, F.O.B.
Cedar Falls, Iowa.
Viking assumes no liability for consequential damages of
any kind and the purchaser by acceptance of delivery assumes all
liability for the consequences of the use or misuse of Viking products
by the purchaser, his employees or others. Viking will assume no field
expense for service or parts unless authorized by it in advance.
Equipment and accessories purchased by Viking from
outside sources which are incorporated into any Viking product are
warranted only to the extent of and by the original manufacturers
warranty or guarantee, if any.
THIS IS VIKINGS SOLE WARRANTY AND IS IN LIEU OF
ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, WHICH
ARE HEREBY EXCLUDED. INCLUDING IN PARTICULAR ALL
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE. No officer or employee of IDEX
Corporation or Viking Pump, Inc. is authorized to alter this warranty.
MPC 2 5M 9-E8
VIKING PUMP INC A Unit of IDEX Corporation Cedar Falls Iowa 50613 U S A
Printed in USA