1、 FORD LABORATORY TEST METHOD BZ 002-01 Date Action Revisions 2001 04 30 Revised Editorial no technical change A. Cockman 1992 06 04 Printed copies are uncontrolled Page 1 of 3 Copyright 2001, Ford Global Technologies, Inc. TESTS FOR CLEANLINESS OF FUEL SYSTEM COMPONENTS Application This procedure de
2、scribes the tests used to determine the amount and type of foreign materials in fuel tanks, lines, pumps and carburetors. Apparatus and Solutions Required Inspection Light With flexible extension. Soft Bristle Brush - 1 inch Chisel or Metal Cutting Shears For fuel tanks. Sieve ASTM No. 200 (74 micro
3、n size). Solvent M 5B58 - Inhibited methyl chloroform; M 1044 C - alcohol. Solutions For chloride determination; see FLTM AZ 002-01 for preparation. Silver Nitrate - 0.1 N Reagent No. 13 Potassium Chromate Reagent No. 112 Conditioning and Test Conditions All test values indicated herein are based on
4、 material conditioned in a controlled atmosphere of 23 +/- 2 C and 50 +/- 5 % relative humidity for not less than 24 h prior to testing and tested under the same conditions unless otherwise specified. FORD LABORATORY TEST METHOD BZ 002-01 Page 2 of 3 Copyright 2001, Ford Global Technologies, Inc. Pr
5、ocedure Fuel Tanks Visual Inspection Visual inspection of fuel tanks should be made with a small flexible light which can be inserted in the tank. Examination should be made for rust and dirt. Chlorides 1. Measure 1000 mL of distilled water into a beaker and bring to a boil. Cover to minimize loss d
6、uring heating. 2. Pour into fuel tank and shake vigorously for at least 1/2 minute to dissolve chlorides. 3. Drain into a beaker, cool and let any sediment settle to the bottom. 4. Aliquot 100 mL into a 300 mL Erlenmeyer flask, add 5 drops of potassium chromate indicator and titrate with 0.1 N silve
7、r nitrate to a reddish color. mL of AgNC3 x normality x 0.03546 x 10 = gram weight of Cl per tank 5. Decant or filter sediment obtained during water wash for chlorides and combine with foreign material obtained by solvent washes. Solids 1. Cut top half of tank from bottom section, using a chisel or
8、metal cutting shears, taking care not to form slivers or chips which will get into interior of tank. 2. Wash the interior of the tank with inhibited methyl chloroform, using a wash bottle and soft bristle brush. Note: If chlorides were determined first, wash tank with alcohol to remove water and fil
9、ter through same filter used in Step No. 3. 3. Filter through a weighed Whatman 42 H filter paper to remove solids from solvents, combine with any sediment from chloride test, dry in an oven and weigh. Report as total solids - foreign material. 4. Screen through a 74 micron (200 mesh) screen onto a
10、glazed paper and weigh portion passing through. Report as foreign material - less than 74 microns. FORD LABORATORY TEST METHOD BZ 002-01 Page 3 of 3 Copyright 2001, Ford Global Technologies, Inc. 5. Combine sample remaining on screen with that which passed through. Place on a glazed paper and separa
11、te magnetic particles by passing a magnet under the paper until the magnetic portion is separated from the non-magnetic material. Weigh magnetic particles and report as total magnetic material. Fuel Lines 1. Rinse the inside of the fuel line with a wash bottle containing inhibited methyl chloroform
12、into a beaker until the washings are clean. 2. Decant or filter insoluble residue, dry and weigh. 3. Report as total solid material. Fuel Pumps and Carburetors 1. Wash off exterior part of assembly with solvent and discard. 2. Disassemble and wash all interior surfaces of pump or carburetor which no
13、rmally contact fuel. Use organic solvents and wash bottle as described under fuel lines. Remove all chips, burrs and shavings from walls and passages and combine with solid material. 3. Decant or filter insoluble residue, dry and weigh. 4. Report as total solid material. Notes: Soluble Material If s
14、oluble material is required, evaporate filtered solvents on a steam bath to a low volume. Rinse into a tared Petri dish, evaporate to dryness; dry in an oven at 300 +/- 5 F for 1 h, cool and weigh. Identification of Solid Material Examine under microscope at approximately 10X magnification and ident
15、ify material such as weld spatter (steel), solder (non-ferrous), sand, fibers, rubber, plastics, etc. Photograph material at 10X to show type of material and percentage of each and at 40X for measuring particle size. Chemicals, materials, parts, and equipment referenced in this document must be used and handled properly. Each party is responsible for determining proper use and handling in its facilities.
