Hale MG - Manual (Page 90)

Muscle Pumps
5-26
i. Apply Loctite 242 to the four 5/16-
18UNC X 1 inch long cap screws and
attach the control body to the rear of
the spring housing. Make sure that the
sensing valve spring properly aligns
with the diaphragm clamp.
j. Make sure the “up” arrow is aligned
properly.
k. Apply Loctite 242 to the 7/16-14UNC
X2 inch long sensing valve mounting
cap screw. Tighten to 40 ft-lb (51 Nm).
l. Connect the lines.
m. Fill the pump and test the valve for proper
operation and leaks.
H. TRV Service
(Refer to figure 6-11)
1. Disconnect electrical wiring, discharge
line and drain tubing.
2. If TRV-L kit is installed.
a. Unscrew pressure switch from fitting.
b. Remove elbow.
c. Remove 1/8 MNPT x 1/8 FNPT
fitting.
3. Unthread thermal relief valve from
attachment flange.
4. Check inlet strainer for blockage. This
should be accomplished once a year or
more frequently in pumping water with
impurities.
5. Apply coating of Loctite PST (or equal
thread sealer) rethread thermal relief valve
into attachment flange.
6. If TRV-L kit is installed, apply coating of
Loctite PST to threads of fitting before
assembly of parts.
a. Install 1/8 MNPT x 1/8 FNPT fitting
into TRV body.
b. Install elbow into fitting and tighten
so elbow outlet is positioned in the up
position.
c. Install pressure switch in elbow outlet.
7. Reconnect drain tubing, discharge line,
and electrical wiring.
8. Fill the pump and test the valve for proper
operation and leaks.
I. Anode Replacement
(Refer to figure 6-17)
1. Consumable zinc anodes should be
inspected at least every 12 months.
2. A minimum of two anodes per pump is
recommended.
3. One anode should be installed on the
suction side and the other on the discharge
side of the pump.
4. To inspect the anodes, drain the pump.
5. Remove four 7/16-14UNC X 1-1/4 inch
long cap screws and remove the anode and
flange assembly.
6. Inspect the consumable zinc anode and
replace when over 75% of zinc has been
consumed (the original anode is 1.25
inches diameter by 2.125 inches long).
7. Clean all gasket surfaces.
8. Replace all gaskets, replace anode
assembly if required, apply Loctite 242 to
the four 7/16-14UNC X 1-1/4 inch long
cap screws, install, and tighten to 40 ft-lb
(54 Nm).
9. Fill the pump and test for leaks.