KC-135AtomizerTestInstruction.pdf.pdf

T.O. 2G-T62T-43

Figure 5-19B. Atomizer Fitting Repair

5-58B Change 9

Figure 5-19C. Flow Test of Atomizer Fittings

Change 9 5-58C

NOTES:

3.

4.

5.

6.

8.

9.

10.

UNEVEN WEAR PATTERNS ON THE EXTERNAL SPLINE OR EXTERNAL GEAR ARE NOT ACCEPTABLE.

THE OIL RETAINER MUST BE LOCATED .13" TO .14" FROM THE EXTERNAL GEAR END AND MUST BE TIGHT.

PARTS WHICH DO NOT MEET THESE REQUIREMENTS SHOULD BE TAGGED UNSERVICEABLE AND HELD FOR

DISPOSITION AT A LATER DATE.

5-58D) Change 9 warning

d. Flow Testing.

(1) Flow test fuel nozzle (3, figure 3-28) as follows:

(a) Connect flow check fixture, ST92300 (75, figure 2-1) to a fuel manifold flow bench, 164101-100 (85, figure 2-1).

(b) Install fuel nozzle (3) in flow check fixture, ST92300.

Calibrating fluid, MIL-C-7024, type II, is toxic to eyes, skin, and respiratory tract.

Do not breathe vapors. Use in a well-ventilated area. Wear eye and skin pro-tection. Avoid use around sparks, open flame, and heated surfaces.

(c) Connect a source of calibrating fluid, MIL-C-7024, type II, at a pressure of 350 psig, 70-90°F, to fuel nozzle (3).

Minimum fuel flow must be 14-16 pph.

(d) Observe fluid spray from nozzle.

Spray must be conical, symmetrical, and free of voids and streaks. Verify that spray angle, when measured 1/2

in. downstream of nozzle, is greater than 70°.

(e) Replace fuel nozzle if it does not sat-isfactorily meet test parameters.

(2) Flow test fuel manifold (9, figure 3-28) as follows:

(a) Install filter fitting (4, figure 3-28) in fuel manifold (9).

(b) Install fuel manifold on fuel manifold flow bench, 164101-100 (85, figure 2-1) with fuel nozzles directed into the beakers provided with flow bench.

Calibrating fluid, MIL-C-7024, type II, is toxic to eyes, skin, and respiratory tract.

Do not breathe vapors. Use in a well ventilated area. Wear eye and skin pro-tection. Avoid use around sparks, open flame, and heated surfaces.

(c) Use calibrating fluid, MIL-C-7024, type II, specific gravity of 0.815, at

80°F, as test fluid. Adjust inlet fluid pressure to 145 psig. Verify that flow rate is 288-312 pph.

(d) The flow rate from each fuel nozzle shall not exceed ±4% from the average.

(e) Test all fuel nozzles. Replace fuel manifold (9, figure 3-28) if it does not satisfactorily meet test parameters.

(3) Flow test oil jet cartridge (75, figure 3-12) as follows:

(a) Using oil, grade S 150, per ASTM 2422, flow test oil jet cartridge.

NOTE

All four jets of oil jet cartridge must flow freely.

(b) Flow test at 0.3-0.5 gpm at 20 psi.

(4) Flow test atomizer fitting (4, figure 5-19A) as follows: (See figure 5-19C.

(a) Using a hydrometer, measure the specific gravity of test fluid.

NOTE

Atomizer fittings must be free of car-bon deposits or other obstructions.

Clean per paragraph 4.3.i.

(b)

( c

( d )

( e

Using a flow test bench, P/N 164101- 100, or equivalent, adjust test flow to

45.0 - 46.0 pounds per hour (pph).

With a test fluid specific gravity of 0.78, pressure shall not exceed 2 psig.

To adjust variations in test fluid flow and specific gravity, verify pres-sure in accordance with the following formula:

Pressure = Fluid Flow Specific Gravity x 1294

Repeat step b. and c. for all atomizer fittings in each liner.

Repair atomizer fitting assemblies (4, figure 5-19A) if flow test indi-cates obstruction as follows:

Remove grommet (3).

Machine off clogged atomizer tube.

Redrill fitting as shown in figure

5-19B.

Clean, blast, and wrap fitting for brazing.

Position tube and brazing onto atomizer fitting as shown in figure 5-19B.

Change 9 5-59

2G-T62T-43_172336-100&160238-400.pdf