TASK 70-21-22-110-801
1 . General.
A.Unless specified differently, Method No. 1 (TASK 70-21-22-110-042, Light Duty Cleaning Using a Tank Dip (Immersion) Process), Method No. 2 (TASK 70-21-22-110-050, Light Duty Aqueous Cleaning Using a Spray Wash Process), and Method No. 3 (TASK 70-21-22-110-802, Light Duty Aqueous Cleaning Using a Spray Wash Process with Solution Recycling) are equivalent alternatives to each other.
B.Light duty aqueous cleaning is a water-based cleaning method that is intended to offer an alternative to mineral oil and hydrocarbon-based solvent cleaners.
C.These methods can be used as alternatives to TASK 70-21-02-110-002, Cleaning Method No. 2 - Vapor Degreasing, when used as general cleaning methods prior to visual, FPI, MPI, or electronic inspections. They can also be used as pre-cleaner processes before the heavy duty cleaning methods like Method No. 6, 7, 9, 10, 16, 17, or 20. This is recommended to preserve the effective life of the deruster and descaler baths. These methods can also be used as approved alternatives to these procedures: TASK 70-21-03-160-001, Cleaning Method No. 3 - Steam Cleaning and TASK 70-21-14-110-012, Cleaning Method No. 14 - Manually-Assisted Detergent Cleaning.
D.These methods can be safely used on all engine components, including titanium. Thorough post-rinsing is emphasized for all parts, and especially for hollow hot section components.
E.Non-metallic parts (or metal parts with non-metallic components or inserts) should only be cleaned by Method No. 1 and Method No. 2 when the cleaning procedure is specified in the Engine/Shop Manual.
TASK 70-21-22-110-042
1 . General - Method No. 1 - Cleaning Method No. 22 Light Duty Aqueous Cleaning.
NOTE:
When you do this procedure (Method No. 1) you must also obey the instructions in TASK 70-21-22-110-801, Cleaning Method No. 22 Light Duty Aqueous Cleaning.
2 . Equipment.
Subtask 70-21-22-110-421
F.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 to neutralize waste and used solutions.
(3)Efficient ventilation system to remove and neutralize vapors.
(4)An alkaline degreasing tank made of stainless steel with a heating coil capable of heating the solution to 210°F (99°C). This tank should have a good solution agitation system. Mechanical agitation is recommended.
(5)A water tank made from stainless steel and a spray gun that are used after alkaline degreasing.
(6)A hot water rinse tank made from stainless steel with heat coil in the tank capable of heating the solution to 160°F (71°C) and a hot air water spray gun.
3 . Materials.
Subtask 70-21-22-110-422
 
Light-Duty Tank Cleaners - Table 1
 
Solution
No.
Operating Temp °F (°C)
 
Androx 6333A
S1141
150-170 (66-77)
 
Blue Gold Industrial Cleaner
S1143
130-150 (54-66)
 
Cee-Bee A-7X7
S1144
120-140 (49-60)
 
Turco 5948-R
S1142
160-180 (70-82)
 
Daraclean 282 or Daraclean 282GF
S1145
120-180 (49-82)
 
Jettacin
S1148
140-160 (60-71)
 
Soluwax
S1158
140-170 (60-77)
 
Eldorado ED-306LF
S1167
120-160 (49-71)
 
Super Bee 300LF or Super Bee 300LFG
S1170
140-160 (60-71)
 
Turco 5948 DPM
S1180
150-175 (65-80)
 
Turco Liquid Sprayeze NP-LT
S1181
90-190 (32-88)
 
Brulin 815 GD
S1182
140-180 (60-82)
 
Ardrox 6376
S1204
150-170 (66-77)
 
CleanSafe 787C
S1207
70-150 (21-66)
 
Aquavantage 3887 GD
S1211
120-180 (49-82)
4 . Procedure.
Subtask 70-21-22-110-423
CAUTION:
THIS METHOD SHOULD NOT BE USED ON PARTS COATED WITH UNSEALED ANODIZE. BASE METAL ATTACK WILL OCCUR.
G.Immerse the part(s) in a tank containing one of the materials listed in Subtask 70-21-22-110-422, Materials. Maintain the solution at the recommended temperature. The best cleaning will occur only if the solution is properly agitated.
(1)Dwell time in bath: 15 to 60 minutes.
CAUTION:
DO NOT LET PARTS STAY IN THE CEE-BEE A-7X7, TURCO 5948 DPM, TURCO LIQUID SPRAYEZE NP-LT SOLUTION, OR AQUAVANTAGE 3887 GD FOR MORE THAN 30 MINUTES OR BASE METAL ATTACK COULD OCCUR.
(2)Dwell time in bath for Cee-Bee A-7X7, Turco 5948 DPM, Turco Liquid Sprayeze NP-LT, and Aquavantage 3887 GD: 30 minutes maximum.
H.Remove the part(s) from the cleaning tank and rinse by spraying with a water jet and by dipping in room temperature water.
I.Process may be repeated if parts are not clean. Repeat Steps 4.A. thru 4.C.
CAUTION:
TITANIUM PARTS MAY BE DAMAGED WHEN EXPOSED TO CHLORIDE CONTENT BEYOND ACCEPTABLE LIMITS.
J.Rinse by immersion in hot water at minimum 150ºF (66ºC) as follows:
(1)If this procedure is used on titanium, titanium is subject to the following requirements regarding chloride. Refer to TASK 70-00-05-800-006, Water Types (paragraph 3., Definitions and Test Protocol).
(a)If parts will be exposed to subsequent processing that operates above 500°F (260°C) (for example, welding or heat treating), the final rinse water used on the parts must not exceed 50 ppm chloride (10000 ohm-cm minimum resistivity, 100 Microsiemens/cm maximum conductivity).
(b)For parts that will not be exposed to subsequent processing that operates above 500°F (260°C), the final rinse water used on the parts can be potable water that must not exceed 250 ppm chloride (1800 ohm-cm minimum resistivity, 550 Microsiemens/cm maximum conductivity).
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. WATER ON THE PARTS MAY DEGRADE THE SENSITIVITY OF THE PROCESS, ESPECIALLY FOR THE WATER WASHABLE PENETRANT PROCESS.
K.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 70-21-22-110-424
L.Do a visual inspection of the parts for cleanliness.
M.Make sure the cleaning and hot water rinse tanks are operating at the recommended temperatures.
N.Skim floating residue off of the surface of the cleaning tank at an interval to prevent surface scum from being redeposited on the cleaned parts as they are pulled out of the tank.
O.Change the rinse waters frequently. If continuous flow tanks are not used to make sure surface of the part is properly rinsed.
P.Do process control on cleaning tank as per the solution sheets, manufacturer's recommendation, or as use requires. See the appropriate solution sheet.
TASK 70-21-22-110-050
1 . General - Method No. 2 - Cleaning Method No. 22 Light Duty Aqueous Cleaning.
Subtask 70-21-22-110-505
NOTE:
When you do this procedure (Method No. 2) you must also obey the instructions in TASK 70-21-22-110-801, Cleaning Method No. 22 Light Duty Aqueous Cleaning.
2 . Equipment.
Subtask 70-21-22-110-506
Q.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 to neutralize waste and used solutions.
(3)Efficient ventilation system for extracting and neutralizing vapors.
(4)An industrial spray wash machine, preferably made from stainless steel, with water jets and turbulators that will direct streams of cleaning solution and rinse water against the parts inside the wash area of the cabinet.
(5)Metering controls to allow correct amount of cleaning material to be metered into the water during the wash cycle.
(6)Suitable controls to allow for programmed washing cycles to include pre-rinse (optional), wash, post-rinse and drying (optional) cycles.
3 . Materials.
Subtask 70-21-22-110-507
 
Light-Duty Cleaners - Table 1
 
Material/Solution
Consumable/Solution No.
Operating Temperature ºF (ºC)
 
Turco 5948-R
C04-152
160-180
 
(2.5% by volume)
(71-82)
 
MagChem DG-Kleen
S1154
155-165
 
(68-74)
 
Turco Liquid Sprayeze NP-LT
C04-193
70-190
 
(10% maximum)
(77-88)
 
Eldorado ED-306LF
C04-218
120-160
 
(8-10% by volume)
(49-71)
 
Super Bee 300LF or Super Bee 300LFG
C04-221
120-160
 
(5-10% by volume)
(49-71)
 
Daraclean 282GF
S1145
120-180
 
(49-82)
 
Turco 5948 DPM
C04-208
150-175
 

(5-10% by volume)
(65-80)
 
Ardrox 6333A
C04-163
150-160
 
(5-10% by volume)
(65-71)
 
Aquavantage 3887 GD
C04-296
120-180
 
(5-10% by volume)
(49-82)
4 . Procedure.
Subtask 70-21-22-110-508
R.Load parts onto cleaning rack for input into parts washer. Load parts so that adjacent parts will not cause masking of parts surfaces from the spray jets and resultant ineffective cleaning. Do not overload parts washer.
S.Load basket into parts washer and start cycle. In general, industrial parts washer have programmable washing cycles incorporating pre-rinse, wash (with detergent), post-rinse, and possibly dry. The cycles will vary based on the machine used and the types and numbers of parts in the machine.
T.A recommended cleaning cycle is as follows:
(1)A pre-rinse of 2 minutes (to wet the parts).
(2)A wash cycle of 5 to 45 minutes (the wash cycle is where the soap is loaded into the machine and recirculated as the machines "cleans" the parts).
CAUTION:
IT IS NOT RECOMMENDED TO USE A RUST INHIBITOR IN THIS CYCLE. IF OLD MACHINERY IS USED AND INHIBITORS ARE REQUIRED AS PART OF THE MACHINE MAINTENANCE, ADDITIONAL STEPS MUST BE TAKEN TO REMOVE THE INHIBITOR FROM THE PART SURFACES IF THE PARTS ARE ROUTED TO FPI AFTER THE SPRAY WASH CLEAN PROCESS.
CAUTION:
PARTS MUST BE THOROUGHLY DRY PRIOR TO FPI. WATER ON THE PARTS MAY DEGRADE THE SENSITIVITY OF THE PROCESS, ESPECIALLY FOR THE WATER WASHABLE PENETRANT PROCESS.
CAUTION:
TITANIUM PARTS MAY BE DAMAGED WHEN EXPOSED TO CHLORIDE CONTENT BEYOND ACCEPTABLE LIMITS.
(3)A post-rinse cycle of 5 to 10 minutes (where the soap and dirt laden water is removed from the cabinet and the parts are rinsed with fresh water to remove soap and dirt residue) as follows. This rinse should be at least one-half cycle of hot water.
(a)If this procedure is used on titanium, titanium is subject to the following requirements regarding chloride. Refer to TASK 70-00-05-800-006, Water Types (paragraph 3., Definitions and Test Protocol).
1If parts will be exposed to subsequent processing that operates above 500°F (260°C) (for example, welding or heat treating), the final rinse water used on the parts must not exceed 50 ppm chloride (10000 ohm-cm minimum resistivity, 100 Microsiemens/cm maximum conductivity).
2For parts that will not be exposed to subsequent processing that operates above 500°F (260°C), the final rinse water used on the parts can be potable water that must not exceed 250 ppm chloride (1800 ohm-cm minimum resistivity, 550 Microsiemens/cm maximum conductivity).
U.After cycle is complete, review parts for cleanliness. If parts are not clean, repeat cycle.
V.Remove parts from washer and route to next process.
W.If necessary, the parts can be dried in an oven with a minimum temperature of 200°F ± 25°F (93°C ± 14°C).
5 . Process Control.
Subtask 70-21-22-110-509
X.If the detergent solution is fresh with each cycle, no solution maintenance is necessary. If the detergent solution is recycled, the cleaning solution must be closely monitored and controlled to make sure that concentrations remain within defined limits. Refer to Subtask 70-21-22-110-507, Materials.
Y.Make sure the solution metering valve is operating properly and supplying the correct amount of detergent per volume of water.
Z.If persistent water spotting is noticed on parts, a switch to demineralized or deionized water is recommended. Presence of water spots may cause undesirable fluorescent background in the penetrant inspection process.
6 . Quality Assurance.
Subtask 70-21-22-110-510
AA.Visually check parts for cleanliness.
AB.Make sure the cleaning and hot water rinse steps are operating at the recommended temperatures.
TASK 70-21-22-110-802
1 . General - Method No. 3 - Cleaning Method No. 22 Light Duty Aqueous Cleaning with Solution Recycling.
Subtask 70-21-22-110-511
NOTE:
When you do this procedure (Method No. 3) you must also obey the instructions in TASK 70-21-22-110-801, Cleaning Method No. 22 Light Duty Aqueous Cleaning.
TASK 70-21-22-110-803
CAUTION:
IT IS NOT RECOMMENDED TO USE ON NON-METALLIC PARTS.
1 . Equipment.
AC.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)The spray machine must have recycling unit.
(3)An industrial spray wash machine, preferably made from stainless steel, with water jets and turbulators that will direct streams of cleaning solution and rinse water against the parts inside the wash area of the cabinet.
Contact Zestron Corporation to get the list of compatible machines.
 
ZESTRON
 
Dr. O.K.Wack Chemie GmbH
 
Bunsenstrasse 6
 
85053 INGOLSTADT - GERMANY
 
PHONE : + 49 841 635 27
 
FAX : + 49 841 635 80
(4)Suitable controls to allow for programmed washing cycles to include pre-rinse (optional), wash, post-rinse, and drying (optional) cycles.
2 . Materials.
Subtask 70-21-22-110-512
 
Light-Duty Cleaners - Table 1
 
Material/Solution
Consumable/Solution No.
Operating Temperature °F (°C)
 
Zestron VD 200
C04-288
104-158
 
(concentrate)
(7-11% by volume)
(40-70)
3 . Procedure.
Subtask 70-21-22-110-513
AD.Load parts onto cleaning rack for input into parts washer. Load parts so that adjacent parts will not cause masking of parts surfaces from the spray jets and resultant ineffective cleaning. Do not overload parts washer.
AE.Load basket into parts washer and start cycle. In general, industrial parts washer have programmable washing cycles incorporating pre-rinse, wash (with detergent), post-rinse, and possibly dry. The cycles will vary based on the machine used and the types and numbers of parts in the machine.
AF.A recommended cleaning cycle is as follows:
(1)A minimal wash cycle of 15 minutes with C04-288   at 113ºF (45°C).
(2)A minimal rinse cycle of 5 minutes with C04-288   at 113ºF (45°C).
(3)A drying cycle of 15 to 30 minutes at 194-212ºF (90-100°C).
CAUTION:
PARTS MUST BE THOROUGHLY DRY PRIOR TO FPI. WATER ON THE PARTS MAY DEGRADE THE SENSITIVITY OF THE PROCESS, ESPECIALLY FOR THE WATER WASHABLE PENETRANT PROCESS.
AG.After cycle is complete, review parts for cleanliness. If parts are not clean, repeat cycle.
AH.Remove parts from washer and route to next process.
4 . Process Control.
Subtask 70-21-22-110-514
AI.As the cleaning and rinsing solutions are used in closed loops, a treatment system is necessary (incorporated in the spray wash machine).
AJ.Check regularly the concentration of the bathes with a refractometer (1.3404 < nD < 1.3449 for a concentration between 7 and 11 percent).
AK.Use demineralized or deionized water to dilute the C04-288   concentrate. Presence of water spots may cause undesirable fluorescent background in the penetrant inspection process.
5 . Quality Assurance.
Subtask 70-21-22-110-515
AL.Visually check parts for cleanliness.
AM.Make sure the cleaning and hot water rinse steps are operating at the recommended temperatures.