Imperial Tools 1003 Capillary Tube Cleaner User Manual

Instructions for thermal cap-check

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A Division of Airserco Manufacturing Company LLC

7555 Tyler Boulevard; Mentor, OH 44060 800-473-1754 Fax: 440 946-8188


CAP.CHECK GENERAL DESCRIPTION -Model 1003 is a unique refrigeration capillary lube
cleaner that allows a serviceman to remove restrictions from cap tubes without messy and time
consuming removal and replacement.
The CAP-CHECK is a portable self-contained hydraulic power unit with auxiliary equipment. It
is designed to pump a high rate of oil into the cap tube to build up pressures needed to open any
plugged cap tube and will clean partially plugged cap tubes when used with the Thermal Chaser

The CAP-CHECK unit contains the following items:

1. Pump and reservoir assembly with ¼” male flare outlet.
2. Hydraulic pressure gauge mounted in above assembly with trigger-operated gauge

shut-off valve.

3. An adapter to connect a cap tube to the CAP-CHECK without using a flare nut. A flare

plug is mounted on the unit to store the adapter when – not in use.

4. A 30” flexible high pressure hydraulic hose.
5. Pump handle with plastic grip.

TO PLACE UNIT IN OPERATION- Make sure reservoir contains oil. Open by-pass valve by
turning valve screw counter-clockwise. Remove sealing cap from CAP-CHECK outlet and attach
flexible hose. Close valve and pump till oil comes out end of hose. Put sealing cap on hose outlet.

TO FILL CAP-CHECK -When reservoir empties leave by-pass valve closed. Remove filler
fitting and fill reservoir with refrigerant oil. Replace filler fitting. Open by-pass valve and pump
10 or 12 strokes. Close by-pass valve and pump again to see if pressure builds up. If it doesn't,
open by-pass valve again and repeat the above procedure. PUMP WILL NOT WORK IF IT HAS

TESTING REFRIGERATION CAPILLARY TUBES -Remove sealing cap from hose outlet.
Loosen cap on filler fitting so air can enter to replace oil pumped out. Close by-pass valve by
turning clockwise and pump till oil comes out of hose fitting. Close refrigerant supply to cap tube.
Disconnect cap tube from system and connect it to hose outlet either directly or with the adapter.
If using adapter be sure to push cap tube thru the neoprene sealer at least 1 inch and tighten
adapter nut until cap tube cannot be pulled out. Pump at an even rate of approximately 30 strokes
per minute (1 second down, 1 second up). The amount of pressure build-up in clean cap tubes
will depend on the size of the cap tube. Large capacity tubes will show practically none while
long tubes of small bore and lower capacity will show as high as 2000 PSI or more instantaneous
pressure but will rapidly return to zero. If pressure builds up and holds or drops very slowly cap
tube is restricted.