Hale TPM Sistem - Manual (Page 4)

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
4
PLUMBING CONNECTIONS
Tubing:
The tubing connections must be made with 3/8” copper tubing or 3/8” nylon tubing having a 1/16” wall
and using compression tube fittings. If nylon tubing is used, it must be a flexible grade of Nylon-11,
and tubing inserts must be used to keep the wall from collapsing when the fittings are tightened. Care
should be taken when using thread sealant on the tubing connections because excess thread sealant can
clog small orifices located throughout the TPM system.
The following 3/8” tubing connections must be made. (Reference Plate No. 743C).
Connect a line from the strainer in the top of the Midship pump marked “DISCHARGE” to the
compression fitting closest to the handwheel in the PMD Control (on the panel). You must use the
pencil strainer in the pump to protect the small flow passages in the PMD control and sensing valve
Connect a line from the other compression fitting in the PMD control (on the panel) to the port
marked “PM” on the top of the sensing valve (bolted on the PG30 relief valve).
Connect a line from the sensing valve port marked “Q” to the QG relief valve compression fitting
that is on top of the bronze casting. If the truck will not be subjected to freezing temperatures,
install a 1/4” NPT pipe plug in the bottom of the QG relief valve by removing the red cap plug. If
the PUMP will see freezing temperatures, refer to the next section regarding DRAIN LINES.
Connect a line from the sensing valve port marked “P” to the fitting on the cover of the PG30 relief
valve.
Connect a line from the sensing valve port marked “A” (located at the top) to the truck’s water
tank, preferably near the top of the tank, above the normal water level. (Note that this line will
need either a drain or heat tape in freezing climates).
Connect a line from the sensing valve port marked “S” to one of the pump taps marked “Vacuum”
using the pencil strainer provided and threaded into the pump. You must use this strainer to protect
the small flow passages in the sensing valve. Discard the 1/4” NPT pipe plug removed where the
strainer was installed.
If the pump will not be subjected to freezing temperatures, remove the red cap plug from the
sensing valve port marked “D” and install a 1/4” pipe plug. If the pump will be subjected to
freezing temperatures, refer to the next section regarding DRAIN LINES.
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