1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 06 24 N-STATUS No replacement named C. Mracna, NA 2006 08 25 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.10 & 4 1995 06 27 Activated L. Gullen Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 1 of 6 HO
2、SE, REINFORCED RUBBER, AUTOMATIC WSS-M96D26-A2 TRANSMISSION FLUID RESISTANCE NOT TO BE USED FOR NEW DESIGN 1. SCOPE This specification defines a straight or formed synthetic rubber hose reinforced with a single ply of braided textile, with good resistance to automatic transmission fluid. 2. APPLICAT
3、ION This specification was released originally for an automatic transmission oil cooler hose. The hose is resistant to long term exposure to automatic transmission fluid up to 150 C and air temperatures up to 125 C. For applications requiring air temperatures above 125 C. 3. REQUIREMENTS 3.0 STANDAR
4、D REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 HOSE CONSTRUCTION The hose shall consist of a smooth bore synthetic rubber tube and high temperature and oil resistant synth
5、etic rubber cover (see para 5.2). The tube shall be covered with a single ply of suitable braided reinforced textile. The hose may be coupled with a crimped metal end-fittings. 3.5 MATERIAL TESTING The following tests shall be performed on finished hoses and/or test specimens cut from them. The test
6、 specimens shall be die-cut from the finished parts and buffed or slit to the required thickness where necessary. When not feasible, specimens cut from molded test slabs manufactured from the same material with an equivalent state of cure shall be used. The test slabs shall have the following dimens
7、ions: 150 x 150 mm min x 2.0 +/- 0.2 mm 3.6 ORIGINAL PROPERTIES Tube Cover 3.6.1 Hardness, International 70 - 85 70 - 85 (ISO 48/ASTM D 1415) 3.6.2 Hardness, Durometer A 70 - 85 70 - 85 (ISO 868/ASTM D 2240, instantaneous, plied-up specimen) 3.6.3 Tensile Strength, MPa, min 9 9 (ISO 37/ASTM D 412, D
8、ie C) ENGINEERING MATERIAL SPECIFICATIONWSS-M96D26-A2Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 6 Tube Cover 3.6.4 Elongation, %, min 125 175 (ISO 37/ASTM D 412, Die C) 3.6.5 Modulus at 100% Elongation, 6.5 - 12.5 3.5 - 10 MPa, min (ISO 37/ASTM D 412, Die
9、 C) 3.6.6 Ozone Resistance, Rating, max 0 0 (FLTM BP 101-01, Procedure A or B) 3.6.7 Compression Set, %, max 60 60 (ISO 815/ASTM D 395 Method B, 70 h at 125 +/- 2 C) 3.7 AGED PROPERTIES 3.7.1 Heat Aged, Cover Only (ISO 188/ASTM D 573, 168 h at 125 +/- 2 C) Hardness Change 0 to +10 Tensile Strength C
10、hange, max -10% Elongation at Break Change, max -40% Modulus at 100% Elongation 6.0 - 12.0 MPa Visual Evaluation: No surface tackiness or cracks when folded flat against itself. 3.7.2 Heat Aged, Cover Only (ISO 188/ASTM D 573, 1000 h at 125 +/- 2 C) Hardness Change 0 to 25 Tensile Strength Change, m
11、ax -20 Elongation at Break Change, max -65 Visual Evaluation: No surface tackiness or cracks when folded flat against itself. 3.7.3 Immersion in Currently Released Production Automatic Transmission Fluid, Tube Only (ISO 1817/ASTM D 471, 168 h at 150 +/- 2 C, see para 5.1) Hardness Change, max -15 Te
12、nsile Strength Change, max -40% ENGINEERING MATERIAL SPECIFICATIONWSS-M96D26-A2Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 6 Elongation at Break Change, max -65% Volume Change 0 to +35% Visual Evaluation: No surface tackiness or cracks when folded flat aga
13、inst itself. 3.7.4 Immersion in Currently Released Production Automatic Transmission Fluid, Tube Only (ISO 1817/ASTM D 471, 1000 h at 135 +/- 2 C, see para 5.1) Hardness Change, max -15 Tensile Strength Change, max -60% Elongation at Break Change, max -85% Volume Change 0 to 35% Visual Evaluation: N
14、o surface tackiness or cracks when folded flat against itself. 3.7.5 Immersion in IRM 903, Tube Only (ISO 1817/ASTM D 471, 168 h at 150 +/- 2 C) Hardness Change, max -25 Tensile Strength Change, max -40% Elongation at Break Change, max -55% Modulus at 100% Elongation 9 - 11.5 MPa Volume Change, max
15、0 to +60% Visual Evaluation: No surface tackiness or cracks when folded flat against itself. 3.8 FINISHED PART 3.8.1 Burst Pressure, min 11 MPa (ASTM D 380) 3.8.2 Adhesion, min 1.4 kN/m (ASTM D 413, Strip Method, Type A) 3.8.3 Tensile Strength (ASTM D 380, 25 mm/minute) This requirement applies only
16、 when couplings are used with the hose. Assemblies must withstand a minimum pull of 1.1 kN without the couplings separating from the hose, leakage at coupling connection or rupture of the hose. ENGINEERING MATERIAL SPECIFICATIONWSS-M96D26-A2Printed copies are uncontrolled Copyright 2010, Ford Global
17、 Technologies, LLC Page 4 of 6 3.8.4 Low Temperature Flexibility, No breaks or Cold Soak cracks Test Method: Condition hose assembly in a straight and/or position at -40 +/- 1 C for 24 h. After conditioning and without removal from the cold box, bend the hose around a temperature conditioned mandrel
18、, having a radius equal to 10 times the I.D. Flexing shall be accomplished within 4 s. 3.8.5 Low Temperature Flexibility, No breaks or Oil Aging/Cold Soak cracks Test Method: Hose assembly shall be filled with current production approved transmission fluid (see para 5.1), closed at both ends and hea
19、t aged at 150 +/- 2 C for 24 h. The aged assemblies, after cooling to 23 +/- 2 C, shall be conditioned at - 40 +/- 1 C for 24 h. After conditioning and while in the cold box, the hose assembly shall be bent around a temperature conditioned mandrel, having a radius equal to the minimum bend radius of
20、 10 times the I.D. Flexing shall be accomplished within 4 s. 3.8.6 Accelerated Impulse Test Test Method: Hose assemblies and/or uncoupled hose, where applicable shall be preconditioned by filling with current production approved transmission fluid (see para 5.1), closed at both ends and heat aged at
21、 150 +/- 2 C for 70 h prior to impulse testing. For initial qualification the aged hose assemblies must withstand 250,000 impulse cycles at maximum working pressure of 1.1 kN without bursting or show any signs of failure. Hose assemblies removed from test stand and burst pressure tested shall not av
22、erage more than 25% below the average of original results per para 3.8.1. Periodic certification testing thereafter shall require aged assemblies to withstand 100,000 impulse cycles at maximum working pressure of 1.1 kN without failure while maintaining temperatures of transmission fluid at 150 C an
23、d the ambient air chamber at 125 C. Burst strength values from hose assemblies after completion of 100,000 impulse cycles shall not average more than 15% below the average of original results (para 3.8.1 and 3.8.3). Impulse Test Conditions: Oil Temperature 150 +/- 3 C Ambient Temperature 125 +/- 5 C
24、 Cycle Rate 30 - 40/min Cycle Data: Pressure Rise Time 0.20 +/- 0.02 s High Pressure Hold Time 0.65 +/- 0.02 s Pressure Drop 0.20 +/- 0.10 s Pressure Variation 0 - 1.10 MPa Hydraulic Fluid Currently Released Automatic Transmission Fluid (see 5.1, FN 1973) ENGINEERING MATERIAL SPECIFICATIONWSS-M96D26
25、-A2Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 5 of 6 3.8.6.1 Oil and Heat Resistance After successful completion of 100,000 impulse cycles according to para 3.8.6, standardized ASTM specimens taken from the hose shall not exceed the following values: Tube Cove
26、r Hardness Change, max -15 +15 Tensile Strength Change, %, +/- 30 +/- 30 max Elongation at Break Change, %, -60 -65 max 3.8.7 Resistance to Kinking Test Method: Insert required length of hose on test fixture securing each end with metal clamps. When installing hose, it shall be bent within 5 s in th
27、e same plane and direction as its free state curvature. Place fixture in an oven at 120 +/- 2 C for 1 h. Remove fixture from oven and within 5 min pass a steel ball of specified diameter through hose installed on fixture. Ball must pass freely. I.D. Test Sample Length, Ball Diameter Typical Range mi
28、n +/- 3.0 mm mm mm mm 7.1 - 8.7 300 3.20 +/- 0.05 8.8 - 10.1 350 3.95 +/- 0.05 ENGINEERING MATERIAL SPECIFICATIONWSS-M96D26-A2Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 6 of 6 Sample Selection: Production hose selected for the kink test should represent, as ne
29、arly as possible, minimum wall thickness. When recording results include wall thickness, ovality, and dimension “A“ (see above). This dimension is measured while sample is on the test fixture. 3.9 HOSE IDENTIFICATION The word transmission fluid and the coding described below shall appear on the oute
30、r cover of the hose in contrasting color and repeated at intervals of 60 mm or less. Formed hose may be coded once per part. Hose shall be identified as follows: a) Supplier identification code. b) Date of manufacture (week, year) and plant designation if supplier has more then one plant producing h
31、oses to this specification. No space between letters. Mandatory on hoses longer then 80 mm only. c) Ford trademark on hoses longer then 150 mm. d) All of the above printing shall be clearly and legibly printed letters of 3.2 - 6 mm in height and proportionate width. When hose is less then 80 mm long
32、, width of letters may be reduced to 3 mm. The following code format is recommended, but not mandatory: G 2 01 Where: G = Plant Designation 2 = Year (single digit) 01 = Week (2-digit number) 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting th
33、e requirements of this specification. 5.1 For information on currently approved transmission fluid for use in this specification contact: Materials Laboratory 15/gm-do1-D Transmission & Axle Engineering Research and Engineering Center Materials Engineering Ford Motor Company, Ltd Ford Motor Company
34、Laindon, Basildon P.O. Box 2097 Essex SS15 6EE, England 36200 Plymouth Road Livonia, MI 48151, USA Materials Engineering Product Engineering Office Ford Motor Co. of Australia Ltd Princes Highway, Norlane Victoria 3214, Australia 5.2 HOSE CONSTRUCTION - ELASTOMERS Tube/Cover - Chlorinated Polyechylene (CPE)/Chlorinated Poly-ethylene (CPE) and/or CM/CSM.
