Thermal Engineering 7003 Installation Manual

REPAIR INSTRUCTIONS FOR CHARGE-CHECK MODEL

NUMBERS:

7001, 7003, 7005, 7009

DISASSEMBLY

STEP #l Gauge Glass—remove both seal caps and springs with a 11/16" Hex wrench. Be careful
not to lose the inner and outer spring and washer from each end. Push the gauge glass out of
either end of the CHARG-CHECK.

STEP #2 – ONLY DONE IF THE CHARG-CHECK LEAKS AROUND LEAKS AROUND
THE CYLINDER AND CASTING. With the bottom casting in a vise, use a 6 point 3/8" wrench
and remove the four tie-bolts that hold the cylinder together. With a sharp object, remove the old
"o" rings and discard them.

ASSEMBLY

If you had to replace the square cut "o" ring that seals the cylinder to the top and bottom casting
follow Step #1. If you are only replacing the seal cap "o" ring follow Step #2.

STEP #1 After all parts are relatively clean, dampen all "o" rings with refrigeration oil. Insert the
square cut "o" ring into the grooves of the casting being careful to keep the "o" ring from twisting
in the grooves. After both castings are ready, place the bottom casting on a hard surface.
Sandwich the cylinder between the top and bottom casting. Put the tie bolts thru the top casting
and tighten them only finger tight into the bottom casting. After all the bolts are hand tight, use
the 3/8" six point wrench and tighten the opposite corners as you would the lug nuts on a car.

STEP #2 To do this step you should lay the charging cylinder flat. Step #2 covers installing the
gauge glass.

Bend the protective tube so that it will fit between the two round bushings attached to the top and
bottom castings. Push the gauge glass thru the holes provided in the casting and center the red
tape so that it is located closest to the cylinder scale. When the gauge glass has been properly
positioned-, hold one end with a finger to keep it from turning and push the "o" ring around the
glass. Place the steel washer (beveled side down) over the "o" ring. Take the inner spring and
insert it inside the larger outer spring. Replace the "o" ring on the seal cap and place the springs in
the seal cap with the inner spring towards the bottom. Add four or five drops of refrigeration oil
to the seal cap. Holding one end of the gauge glass with a finger, carefully screw the seal cap
down. Tighten with a 11/16" Hex wrench. Repeat on the other end.

THERMAL ENGINEERING COMPANY

A Division of Airserco Manufacturing Company LLC

7555 Tyler Boulevard; Mentor, OH 44060 800-473-1754 Fax: [phone]

www.thermalengineeringcompany.com