REFRIGERANT TUBING - AIR CONDITIONING - MAINTENANCE INSTRUCTIONS.

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REPLACE - continued

TM-55-1905-219-14-9 Landing Craft Utility (LCU) 1667 Class Boston Hull Numbers 1667-1670 NSN 1905-00-168-5764 Manual

REFRIGERANT TUBING - AIR CONDITIONING - MAINTENANCE INSTRUCTIONS. - continued

TM 55-1905-219-14-9

4-35.6. REFRIGERANT TUBING - AIR CONDITIONING - MAINTENANCE INSTRUCTIONS.

all burrs and dents to avoid internal restrictions and to permit proper fit with companion fittings. If tubing is cut

with a hack saw, use a fine-tooth blade, preferably 32-teeth per inch.

When making soldered or brazed joints, brighten up the ends of the tubing or pipe with a wire

brush or crocus cloth to make a good bond. Do not use sandpaper, emery cloth, or steel wool for this cleansing

since this material may enter the system and cause derangement.

Never use acid for soldering and be sure to use a flux whose residual substance will not form

an acid. Use flux sparingly so that residues will not enter the system. Remember, any foreign matter entering

the system eventually will be washed back to the compressor and cause damage. The danger of admitting

excessive flux as well as solder or brazing alloy is accentuated if fittings and tubing are improperly fitted

because of distortion in preparation.

The piping requiring maintenance is shown in the following figures:

4-979