CHAPTER 2 OPERATING INSTRUCTIONS

TM 5-4940-228-14 CHAPTER 2 OPERATING INSTRUCTIONS Section I. OPERATING PROCEDURES 2-1. General. Operation of the Model 50-6609 paint spray out- fit must be in accordance with instructions con- tained in this chapter. Procedures for achieving the type of operating indicated in the following para- graphs are provided for operation under normal con- ditions. For operation under unusual or extreme conditions, refer to Section II. 2-2. Preparation for Starting. Before starting the compressor assembly, you should prepare it for operation in accordance with the following paragraphs (Fig. 2-1): a. Perform daily preventive maintenance pro- cedure. (Refer to Chapter 3) b. Place the compressor assembly on a reason- ably level area in a well ventilated, dust-free lo- cation. c. Remove engine oil level gage; check oil level. Add oil if necessary. d. Remove dipstick from compressor and check oil level. Two marks are near the end of the dip- stick; correct oil level is when oil on the dipstick is between both marks and the bottom. (Fig. 2-1) Add oil, if below lower mark. NOTE Oil level checks will be in error if com- pressor assembly is not level. e. Check gasoline tank to be certain sufficient gasoline is in the tank by removing gasoline tank cap and looking inside. Use regular grade gasoline. f. Keep cart mounted compressor assembly as far as possible from the painting operation so that paint does not clog the engine and compressor cool- ing fins or filters. WARNING Do not operate the Paint Spray Outfit in an enclosed area unless the exhaust gases are piped to the outside. In- halation of exhaust fumes will result in serious illness or death. g. If both sets of paint spray equipment are to be used, connect both 50 foot lengths of red air hose to air valves on pulsation chamber (Fig. 2-2). Connect opposite ends of red air hoses to each air inlet valve on the pressure (paint) tanks (Fig. 2-3). If neces- sary, two 50 foot lengths of red air hose can be cou- pled together; this will allow you to move pressure tanks in a 100 foot circle of the compressor. h. Connect one end of each 25 foot length of red air hose to the air shutoff valve on each pressure tank (Fig. 2-3). Connect the opposite end of each red air hose to the air connection on the bottom of each spray gun (Fig. 2-4). i. Connect one end of each 25 foot black fluid hose to the fluid hose connection on each pressure tank (Fig. 2-3), Connect the other end of each black fluid hose to the fluid connection on the bottom of the spray gun head on each spray gun (Fig. 2-4). CAUTION Never use red air hose for fluid. Black fluid hoses have a special lining to re- sist chemical properties of solvents and thinners. 2-3. Paint Preparation. The Paint Spray Outfit can be used to apply any clean paint of a consistency as used for hand-brush application. Mix the necessary amounts of paint and thinner. Strain the paint through cheese cloth and pour into pressure tank insert pail. The pres- sure tank is equipped with an air motor agitator which will allow you to stir paint as necessary dur- ing the painting operation. 2-4. Preparation of Respirators. Refer to Figure 2-5 and proceed as follows: a. Remove facepiece (10) from container, remove two cartridges (3), two prefilters (2) and two filter covers (1) from plastic bags. b. Place one prefilter on each cartridge and press filter cover over each prefilter and cartridge to hold prefilter in place. c. Screw both cartridges into facepiece. 2-1