TASK 70-21-14-110-012
1 . General.
A.This cleaning method uses a liquid solution of detergent in combination with mechanical agitation to remove oil, grease, soot, and various foreign deposits formed on cold-section parts of the engine. The following process is recommended to prepare the surface for fluorescent-penetrant inspection.
NOTE:
Unless specified differently, the procedures that follow are considered equivalent alternatives to this process for appropriate sized metallic parts:
TASK 70-21-03-160-001, Cleaning Method No. 3 Steam Cleaning
TASK 70-21-22-110-042, Cleaning Method No. 22 Light Duty Aqueous Cleaning - Method No. 1
TASK 70-21-22-110-050, Cleaning Method No. 22 Light Duty Aqueous Cleaning - Method No. 2.
2 . Equipment.
Subtask 70-21-14-110-121
B.The following equipment is required for the application of this process.
(1)Safety equipment and devices which are standard equipment in surface treatment shops such as: eye bath, emergency showers, protective clothing against electroplating products and means for neutralizing acid or alkaline splashing.
(2)Processing plant for neutralizing waste and used solutions.
(3)Efficient ventilation system for extracting and neutralizing vapors.
(4)Various types of fiber bristle brushes suitable for part configuration and abrasive polishing pads C10-010  .
(5)Plastic or stainless steel containers for mixing and holding detergent solutions.
(6)A water rinse tank made from stainless steel and a water spray gun, for use after the detergent cleaning.
3 . Materials.
Subtask 70-21-14-110-122
 
Consumable Product
No.
 
Dubois C 1102
C04-045
 
Cee-Bee Intex 8201
C04-044
 
Turco 5948-R
C04-152
 
Ardrox 6085
C04-209
 
Ardrox 6333A
C04-163
 
MagChem DG-Kleen
C04-184
 
Turco 5948 DPM
C04-208
 
Super Bee 300LF or Super Bee 300LFG
C04-221
 
Citrikleen HD
C04-045
 
Gas Path Cleaners
C04-140
 
Blue Gold Industrial Cleaner
C04-164
4 . Procedure.
Subtask 70-21-14-110-123
C.Flush part with clean water.
D.Alternative procedure available. Saturate abrasive polishing pads and a fiber bristle brush with a 2 to 50 percent concentration of detergent cleaning solution. Use hot water to make the detergent cleaning solution.
D.A.Alternative procedure. Use a pressurized wand (at up to 2,000 psi maximum pressure) to apply the above detergent solution. Use hot water in the pressure washer to minimize detergent foaming if necessary.
E.Alternative procedure available. Vigorously scrub the area containing foreign material using the polishing pads and scrub brush as required.
NOTE:
Either hand or mechanical operation of brushes is permitted; however, precautions should be taken to prevent any metallic portion of the brush or driving mechanism from contacting the part surface.
E.A.Alternative procedure. Use a pressurized wand (at up to 2,000 psi maximum pressure) to scrub the part with the detergent solution. Use hot water in the pressure washer to minimize detergent foaming if necessary.
F.After deposits are removed, flush the part with clean water as necessary. The use of a pressurized wand (at up to 2,000 psi maximum pressure) to rinse the part is permitted.
G.Rinse by immersion in hot water at minimum 150ºF (66ºC).
WARNING:
WHEN USING COMPRESSED AIR FOR CLEANING, COOLING, OR DRYING, DO NOT EXCEED 30 PSIG (207 KPA). WEAR EYE PROTECTION AND DO NOT DIRECT COMPRESSED AIR AT SELF OR OTHERS.
CAUTION:
PARTS MUST BE THOROUGHLY DRY PRIOR TO FPI INSPECTION. WATER ON THE PARTS MAY DEGRADE THE SENSITIVITY OF THE PROCESS, ESPECIALLY FOR THE WATER WASHABLE PENETRANT PROCESS.
H.Dry the part by one of the following two methods:
(1)Flash dry the part as follows:
(a)Keep the part submerged until the part reaches a temperature sufficient to provide for flash drying.
NOTE:
The time required will vary with part size, water temperature and tank size. Proper flash drying is indicated by seeing the water on the surface of a part start to "flash" or "whisk" off as the part is being removed from the hot water tank.
(b)Remove the part from the water. The part will flash dry as soon as it is removed from the water. Use repositioning, suction, blotting with a clean, absorbent material, or by blowing off with an oil and water filtered shop air gun to remove excess water.
(2)You can substitute drying the part in an air re-circulating oven for the dwell time in the hot water.
(a)Remove the part from the water. You can remove excess water by repositioning, suction, blotting with a clean absorbent material, or blowing the water off with an oil and water filtered shop air gun.
(b)Move the part to the oven and dry at 200°F ± 25°F (93°C ± 14°C) until the part reaches the oven temperature and all traces of surface water are removed.
5 . Quality Assurance.
Subtask 70-21-14-110-124
I.Visually check the part for cleanliness.