Hale MG - Manual (Page 102)

Muscle Pumps
5-38
s. Tests operate the primer to ensure it is
working correctly.
t. Return apparatus to normal operation.
2. SPV Priming Valve
(Refer to figure 6-8)
a. Drain the pump.
b. Disconnect the 3/4 inch (19 mm)
vacuum hose connecting the priming
valve to the primer. Remove two 7/16-
14UNC nuts attaching the priming valve
to the studs in the pump body or
universal adapter if mounted.
NOTE: If the strainer and O-ring seal remains on
the pump body, remove it carefully for cleaning
and installation. If the valve strainer is removed as
part of the priming valve, remove it from the body
and set it aside. Use care as the valve strainer is
easily damaged.
c. Note the location of the drain hole in
the diaphragm cover, and then remove
the eight 5/16-18UNC X3/4 inch long
cap screws securing the diaphragm
cover to the valve body. Remove the
diaphragm cover and the diaphragm.
d. Hold pressure on the diaphragm
washer to compress the valve spring,
then remove the diaphragm washer
retaining screw. Remove the
diaphragm washer and valve spring.
From the opposite side of the valve
body, remove the valve.
e. Clean all components of the priming
valve and mating surfaces. Inspect the
valve seat, and replace, if worn or
damaged.
f. Install the valve into the valve body
from the pump side of the body.
g. Install the valve spring and diaphragm
washer onto the valve. Apply Loctite
242 to the diaphragm washer retaining
screw, compress the valve spring with
the diaphragm washer and install the
valve.
h. Align the diaphragm holes with the
cap screw holes in the diaphragm
cover. Apply Loctite 242 to the eight
5/16-18UNC X3/4 inch long cap
screws and install the diaphragm
cover and diaphragm valve body.
Tighten to 17 ft-lb (23 Nm).
i. Install the valve strainer and O-ring
seal onto he pump side of the priming
valve.
j. Apply Loctite 242 on the two 7/16-
14UNC priming valve-mounting
nuts and install the priming valve
into the pump body. Tighten to 40
ft-lb (54 Nm).
k. Connect the vacuum hose to the
primer.
l. Fill the pump and test the valve for
proper operation and leaks.
3. PVG Priming Valve.
(Refer to figure 6-9)
a. Drain the pump.
b. Disconnect the 3/4 inch flexible hose
to the ESP priming pump and the
electrical connections.
c. Remove two 7/16-14UNC X 1-1/4
inch cap screws retaining the PVG
priming valve to the pump body.
d. Remove the PVG priming valve and
discard.
e. Remove the old gasket from the pump
body.