1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2003 08 14 Activated M. Swain Printed copies are uncontrolled Copyright 2003, Ford Global Technologies, Inc. Page 1 of 3 FLUID, POWER ASSISTED STEERING, EXTENDED WSS-M2C204-A2 TEMPERATURE RANGE 1. SCOPE The material defined by this specificati
2、on is a power assisted steering (PAS) fluid composed of high viscosity index PAO and hydrocracked base fluids and additives. 2. APPLICATION This specification was released originally for fluid used in PAS hydraulic systems. The viscosity characteristics of this fluid reduces system power consumption
3、 compared to standard mineral oil based products, particularly at low temperatures. CAUTION: The flash point of this material (approximately 150 C) is significantly lower than previous PAS fluids (approximately 190 - 200 C). 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material
4、 suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 COLOR Dyed Green Use the weight percent necessary of a stable green dye to produce a distinct green hue when one drop of fluid is placed on a white blotter or filter paper.
5、 The color shall not significantly deteriorate during any test herein. 3.3 VISCOSITY 3.3.1 Kinematic at 100 C, min 6.0 +/- 0.5 mm2/s (ISO 3104) 3.3.2 Dynamic at - 40 C, max 1 350 +/- 400 mPa.s (ISO 3104/ASTM D 2983) 3.3.3 Taper Roller Bearing Shear Stability 25.0% (DIN 51350-6 - KRL/C, max viscosity
6、 loss) 3.3.4 Viscosity Index, min 300 (ISO 2909) 3.4 POUR POINT, max - 50 C (ISO 3016) ENGINEERING MATERIAL SPECIFICATIONWSS-M2C204-A2Printed copies are uncontrolled Copyright 2003, Ford Global Technologies, Inc. Page 2 of 3 3.5 FLASH POINT Report C (ISO 2592/2719) 3.6 MISCIBILITY TEST The fluid sha
7、ll be compatible with previously used WSA-M2C195-A material when equal volumes of each are heated to 150 +/- 2 C for one hour and then cooled to - 40 +/- 2 C for one hour. No visible deposits or separation shall occur (visual check only). 3.7 COPPER CORROSION (ISO 2160) 3 h at room temperature, max
8、1a 3 h at 150 +/- 2 C, max 1b 3.8 ANTI FOAMING PROPERTIES Foam Tendency Foam Stability (ASTM D 892/D 6082) at end of 5 min at end of 1 min blowing period settling period Sequence 1, max 25 mL 0 mL Sequence 2, max 50 mL 0 mL Sequence 3, max 25 mL 0 mL Sequence 4(initial approval only), max 125 mL 0 m
9、L (For Sequence 4 use ASTM D 6082) 3.9 MOISTURE, max 0.1% (Any agreed method) 3.10 FZG TEST METHOD A/8, 3/90, min 11 (ISO 14635-1) 3.11 EFFECT ON CEC L-39-T-96 REFERENCE ELASTOMER COMPOUNDS (ISO 1817, 7 days +/- 2 h, 150 +/- 2 C) Change in volume, % Report Change in hardness, IRHD Report (ISO 48) 3.
10、11.1 RE1 (fluoroelastomer) 3.11.2 RE2 (acrylic) 3.11.3 RE3 (silicone) 3.11.4 RE4 (nitrile) ENGINEERING MATERIAL SPECIFICATIONWSS-M2C204-A2Printed copies are uncontrolled Copyright 2003, Ford Global Technologies, Inc. Page 3 of 3 3.12 DENSITY Report (ISO 3675) 3.13 EVAPORATION LOSS (NOACK), max % mas
11、s loss (ASTM D 5800/DIN 51581/IP 421) 100 C, 1 hour 1.5 150 C, 1 hour 7.5 3.14 FUNCTIONAL APPROVAL Materials being evaluated for initial approval will be subjected to a functional trial. Functional trial results shall be evaluated by the responsible Systems Engineering and Materials Engineering acti
12、vities prior to material approval and release. 3.15 ODOR Materials shall produce no objectionable odor during any test performed herein. 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 4.1 TEST METHODS The test methods shown are for indication only. If the methods shown are impracticable then alternative methods may be accepted. The use of alternative methods should be confirmed by the responsible Materials Engineering activity before submission of any data.
