Hale MG User Manual download pdf (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.

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