Hale TPM Sistem - Manual (Page 2)

Hale Products Inc. • A Unit of IDEX Corporation • 700 Spring Mill Avenue • Conshohocken, PA 19428
Phone: 610/825-6300 • Fax: 610/825-6440 • 800-220-4253 • www.haleproducts.com
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QG RELIEF VALVE
On new pumps, the QG (internal) relief valve is shipped completely installed. If you are installing a
TPM on a new pump, skip to the next Section, “PG30 Relief Valve € Sensing valve Assembly”. If you
are retrofitting, follow Steps 1, 2, 3, below:
The existing QD Relief Valve must be removed from the Midship pump body. Disconnect the old
PM control tubing line. Disconnect the drain line if used. Disconnect the electric switch leads.
Remove the four 7/16” hex head capscrews holding the cover, switch bracket, and relief valve
in place. Remove the retaining ring holding the spring in place. Remove the spring and cast iron
cover. The brass cage with piston and valve stem must be removed from the pump. The best
method here is to CAREFULLY get pry bars under the lip of the cage, at the pump surface. Pry
the cage out, taking care not to mar any of the cast iron pump surfaces. The brass parts will all be
discarded, so do not be concerned about destroying them during the removal.
Once the brass parts are removed, the bore in the pump body MUST be cleaned to remove any rust
or mineral deposits that may have accumulated on the machined surfaces. Use a wire brush and
emery cloth if required. Be sure these surfaces are PERFECTLY CLEAN before proceeding to
the next step, because they are o-ring sealing surfaces.
Locate the new QG relief valve assembly. Install the two large o-rings provided in the two grooves
at the outside diameter, and coat these o-rings and pump bores with a general purpose grease
before inserting. The new valve must slide in smoothly. If it does not, clean the pump bore more
thoroughly. Once installed, rotate the valve so the compression tube fitting is locate UP and the red
cap plug DOWN. Attach with four 7/16-14 B 1-1/4 LG. hex head capscrews (018-1812-02-0) and
tighten to 48 ft. lbs. torque.
Instructions to install a replacement 200-2261-00-0 Indicator Light Switch. This switch is a
proximity switch and senses the position of the piston and valve. Connect the leads of the switch
to a test light. The test light should be lit. Screw the switch into the 044-0122-00-0 cover. The
cover and the rest of the QG Relief Valve parts should be completely assembled. As the switch is
screwed into the cover, the test light will go off. Thread the switch in an additional 3/4 to 1-1/4
turns. The switch location is now set. Tighten the switch lock nut. 1.
2.
3.
4.