BLACKMER IOM E Series, Installation, Operation & Maintenance Manual, Page: 23 / 52

1901-a00 23
S E C T I O N 7
Pump Disassembly and Repair Process
RELIEF VALVE DISASSEMBLY
(E1-2 thru-E1-82 Models)
1. Remove the screws that hold the valve body to the head. It is normal for the valve spring to push the valve body away
from the head during this step; spring must be fully relaxed before the screws are fully removed.
2. Remove the valve body, spring, poppet and O-ring.
RELIEF VALVE DISASSEMBLY
(E1-133 and E1-222 Models)
1. Place a mark on the valve and head prior to disassembly in order to ensure proper reassembly.
2. Remove the pressure relief valve cap.
3. Measure and record the extension length of the adjusting screw.
4. Loosen the pressure relief valve lock nut and then back out pressure relief valve bonnet and adjusting screw until the
spring pressure is released.
5. Remove, clean and inspect all parts (i.e., bonnet, spring guide, spring and poppet) for wear or damage and replace as
needed.