(2)  
Solvent - Final Cleaning 0f All Organic Coatings Prior to Painting (Series 85) (Ref AMM/SOPM 20-30-85)

(3) 
 Naphtha

3.  Prepare for Painting
A.  Metal
(1)  
With Pretreatment: Aluminum (alodined or anodized), metal sprayed aluminum (alodined), magnesium (Dow treated), titanium (treated with phosphate fluoride), carbon and low alloy steel (plated or phosphated).

(a)  
Inspect for visual evidence of soil.

(b)  
Proceed to paint parts not soiled or contaminated.

(c)  
Parts soiled or contaminated may be cleaned by any of the following methods. 1) Solvent clean using any referenced solvent.

2) Alkaline clean. Do not use soak period longer than 20 minutes. Do not use on cadmium or cadmium-titanium plated parts. 3) Vapor degrease.

(d)  
Proceed to paint parts.

(2) 
 Without Pretreatment

(a)  
Abrasive clean titanium, stainless steel, low alloy steel, and copper.

(b)  
Solvent clean using specified solvents. Paint stainless steel and low alloy steel within 4 hours of blasting.

(c)  
Proceed to paint parts.

500 
51-21-51 Page 702  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  May 01/98 

B.  Nonmetals: Plastic, wood, adhesive, and sealant
(1)  
Solvent clean with naphtha.

(2)  
Proceed to paint parts.

C.  Previously Painted Surfaces
(1)  Surfaces with BMS 10-11, type 1 and 2
(a)  
Less than 48 hours old: solvent clean with solvent, Series 85 (Ref AMM/SOPM 20-30-85), or sand when necessary with 320 or finer grit paper, apply BMS 10-11, type 1 for touch-up, as necessary, proceed to paint parts.

(b)  
Greater than 48 hours old: reactivate by reactivation methods 1 or 2, apply BMS 10-11, type 1, as necessary, proceed to paint parts.

D.  Reactivation
(1) 
 Method 1

(a)  
Manual solvent clean with toluene.

(b)  
Abrasive clean with aluminum oxide abrasive discs or paper.

(c)  
Manual solvent clean with MIBK.

(2) 
 Method 2

(a)  
Alkaline clean with GMC 528B diluted 1 part to 3 parts water using one of the following methods: 1) Manual clean 2) Pressure clean with nonatomizing spray gun. Minimum impingement time of 5

seconds with maximum stand time of 15 minutes.

(b)  
Remove cleaner with clean water.

(c)  
Wipe and blow surface dry with filtered compressed air.

(d)  
Remove visible soil by solvent cleaning with specified solvents.

(e)  
Within 48 hours of step (a) clean with Tec 902 using one of the following methods:  1) Manual solvent clean. 2) Pressure clean with nonatomizing spray gun. Minimum impingement time is 5

seconds with minimum stand time of 2 minutes.

(f)  
Thoroughly rinse with water before Tec 902 evaporates.

(g)  
Within 12 hours of cleaning with Tec 902 and within 6 hours before painting clean with solvent, using one of the following methods: 1) Manual solvent clean 2) Pressure clean with nonatomizing spray gun. Minimum impingement time of 5

seconds.

(h)  
Blow dry with filtered compressed air.

500 
May 01/98  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  51-21-51 Page 703 

E.  Mixing and Thinning of Primer or Enamel (Fig. 701)
CAUTION:  DO NOT USE ANY PAINT MATERIAL OR CATALYST THAT IS GELLED, SKINNED, CLOUDY OR SETTLED.
(1)  
Mix base, catalyst or thinner components according to figure 701.

CAUTION:  DO NOT MIX BASE, CONVERTER OR CATALYST OR THINNER COMPONENTS OF DIFFERENT MANUFACTURERS' SYSTEMS. THEY ARE NOT INTERCHANGEABLE.

(2)  
Agitate each component separately.

(3)  
Add catalyst or converter to base material slowly while agitating.

(4)  
Add necessary thinner and take viscosity.

(5)  
Strain through a 60-90-mesh paint strainer or several layers of clean gauze.

(6)  
Allow to stand one-half hour before using.

(7)  
Label container with date, hour of mixing, name of workman, time of expiration of pot life.

500 
51-21-51 Page 704  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  May 01/98 
　
中國航空網 m.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：737 AMM 飛機維護手冊 結構 STRUCTURES(16)