Hale ESP Priming System - Manual (Page 44)

❑ Maintenance
44 ESP Primer System Instruction Guide
p/n: 029-0810-01-0
Note: If the Switch is being replaced only, simple unthread the switch from the plate
and install the new switch.
10. Thread a 3/8”-16 screw into the piston stem, then tap the piston from the
valve body. Remove the spring.
11. Using an O-ring hook-type tool, reach into the valve body and remove the
center valve body O-ring and the piston stem O-ring, Also remove the O-
ring from the piston and discard all. (See Figure 5-5: “PVG Valve Parts
Breakdown” on page 43.)
12. Examine the piston and valve body bore for defects, e.g., scratches, nicks or
pitting. Repair or replace accordingly.
13. For Hale recommended cleaners, see heading “Lubricant Specifications” on
page 45.
Reassembly Hints
❑ Reassemble the PVG valve by following the preceding steps in reverse
order.
❑ Apply a light film of general purpose grease to the new O-rings and install
two within the body of the valve and one on the piston.
❑ Apply a thin film of grease to the valve piston before inserting into the valve
body.
❑ Use a Lithium-based grease with 1% to 3% Molybdenum Disulfate. For a
listing, see heading “Lubricant Specifications” on page 45.
❑ Apply Loctite #246 to all screws and an appropriate pipe sealant to the 3/4”
NPT pipe threads.
❑ If the switch is removed from the plate, install the plate with the counterbore
side facing the housing mounting bosses. (See Figure 5-4: “Hale PVG Parts
Overview” on page 42.)
❑ Before placing apparatus into operation, the system must be tested and
checked for leaks.