1、 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2017 by Navistar, Inc. FEBRUARY 2017 Page 1 of 10 NAVISTAR, INC. Material, Parts, and Process Specificat
2、ions (MPAPS) NUMBER: MPAPS F-6012 Former Designation: TMS-6012 TITLE: Power Steering High Pressure Hose CURRENT REV No.: 1702 DATE: Feb. 2017 WRITTEN/EDITED BY: W. Cook APPROVED BY: R. Goluch SUPERSEDES: Rev. 1606 June 2016 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION This s
3、pecification may involve hazardous materials, equipment, and procedures. This specification does not purport to address all of the safety issues associated with its use. The user is responsible to consult appropriate safety and health practices and to determine the applicability of regulatory limits
4、 prior to use. 1.0 APPLICATION This specification outlines the minimum requirements for a hose reinforced with a wire braid which is used in power steering pressure systems or equivalent hydraulic systems. The operating temperature shall be -40 to +150C (-40 to +302F). 2.0 SCOPE This specification c
5、overs the general, property and performance, quality, source approval and quality control requirements for a hose purchased with end fittings and used as a flexible connector in power steering systems requiring hose with 1/2“ or smaller ID (-8 dash size and smaller). The hose shall be classified acc
6、ording to the maximum working pressure of the hydraulic system, as follows: Nominal Type Maximum Working Pressure Bend Radius ID MPa psi cm in (-4) in III 34.5 5000 7.6 3.0 I 17.2 2600 12.7 5.0 (-8) 1/2 in II Obsolete (See Note) III 21.0 3000 12.7 5.0 I 18.0 2600 12.5 4.9 (-6) 3/8 in II Obsolete (Se
7、e Note) III 21.0 3000 6.5 2.6 I 25.0 2600 9.0 3.5 (-3) 3/16 in II Obsolete (See Note) III 21.0 3000 4.5 1.8 Note Do not use Type II in new designs. For existing drawings that specify Type II, Type I or III may be substituted. 2.1 Restricted Chemical Substances Effective January 1, 2007, all product
8、supplied to the requirements of this specification must comply with the requirements of the MPAPS B-50 specification. NUMBER: MPAPS F-6012 TITLE: Power Steering High Pressure Hose REVISION: 1702 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission f
9、rom Corporate Technical Standards. Suppliers are required to assume all patent liability. 2017 by Navistar, Inc. FEBRUARY 2017 Page 2 of 10 3.0 REFERENCE DOCUMENTS Unless otherwise specified, the latest issue of all referenced standards shall apply. The following Specifications, Standards, and Regul
10、ations are referenced in this specification. Quality System Standard ISO 9001 or TS-16949 NAVISTAR MPAPS F-2 ASTM D471 CFR Title 29, Part 1910 NAVISTAR MPAPS G-20 ASTM D865 NAVISTAR Supplier Packing and Shipping Std. D-13 NAVISTAR MPAPS G-22 ASTM D1418 NAVISTAR Engineering Design Std. A-16 NAVISTAR
11、MPAPS G-9009 ASTM D2240 NAVISTAR MPAPS A-0 Part II NAVISTAR MPAPS P-9543 ISO 8033 NAVISTAR MPAPS A-45 ASTM B117 MIL-L-2104 NAVISTAR MPAPS B-21 ASTM D380 SAE J343 NAVISTAR MPAPS B-50 ASTM D395 SAE J517 NAVISTAR MPAPS B-6810 ASTM D412 4.0 REQUIREMENTS 4.1 Hose Construction The hose shall be constructe
12、d with a smooth bore inner tube of suitable synthetic rubber reinforced with plies of braided fabric and/or steel and covered with a black (unless otherwise specified) oil and weather resistant synthetic rubber or textile cover. 4.2 Fittings 4.2.1 Material Fittings shall be made from steel, Code 0-1
13、15, per MPAPS A-0, Part II, and meet the dimensional requirements shown on the engineering drawing. 4.2.2 Finish Unless otherwise specified: a) Zinc plating, Class 6A, per MPAPS G-20 b) Zinc-nickel plating, Class ZNi-C2 or ZNi-C3, per MPAPS G-22 For crimped socket products, use the corrosion require
14、ments from section 4.7.8.2. 4.3 Tubing 4.3.1 Material Tubing will be steel tubing, single-wall, electric-resistance welded (ERW) low carbon steel, Grade F, per MPAPS A-45 Part II with flash height controlled to 380 m (0.015 inch) max. 4.3.2 Tubing Finish 4.3.2.1 Paint Steel tubing will be painted pe
15、r MPAPS G-9009, Class II_ (NAV 0001 BLK). 4.3.2.2 Optional finish Unless otherwise specified: a) Zinc plating, Class 8A, MPAPS G-20 b) Zinc-nickel plating, Class ZNi-C2 or ZNi-C3, per MPAPS G-22 Suitable for use only on tubes that are plated after forming. NUMBER: MPAPS F-6012 TITLE: Power Steering
16、High Pressure Hose REVISION: 1702 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2017 by Navistar, Inc. FEBRUARY 2017 Page 3 of 10 4.3.3 Interior Surfac
17、es: Plating on the inside of tubes and fittings is not required. 4.3.4 Tube Design Steering tube designs are dependent upon the space available in the engine compartment, the proximity of the parts to be connected, and need to avoid interference with other engine compartment components and connector
18、s. Tube design uses the XYZ-Tube program in the Unigraphic Grip Program System. All radii are specified to the centerline of the tube and all dimensions are given from the centerline and intersecting points. Three sizes of steel tubing are used (see Table 1 for tube size, wall thickness and bend rad
19、ii). Terminology and Design Factors for Tube Bending are indicated in Figures 1 and 2. Recommended Centerline Bend Radii are identified in Table 1; variation from these radii must be approved by Navistar Engineering. In cases where the dimension is shown as a range, the larger number is preferred fo
20、r ease of manufacture and cost, but the smaller number may be used when design constraints require its use. TABLE 1. STANDARD SIZES AND BEND RADII FOR STEEL TUBING Size Outer Diameter Wall Thickness Centerline Bend Radii 6.35 mm (1/4 inch) 0.89 mm (.035 inch) 12.70 mm (0.50 inch) 12.70 mm (1/2 inch)
21、 1.24 mm (.049 inch) 25.40 mm (1.00 inch) 12.70 mm (1/2 inch) 2.08 mm (.082 inch) 25.40 mm (1.00 inch) Figure 1. Tube Bending Terminology NUMBER: MPAPS F-6012 TITLE: Power Steering High Pressure Hose REVISION: 1702 This document is restricted and may not be sent outside Navistar, Inc. or reproduced
22、without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2017 by Navistar, Inc. FEBRUARY 2017 Page 4 of 10 Figure 2. Design Factors for Tube Bending 4.4 Brazing BCu (Copper), BAg (Silver), BCuZn (Brass) at the producers option. 4.5 Dimensions Hose
23、 shall meet the dimensional requirements of SAE 100R1, SAE 100R2, SAE 100R16 or SAE 100R17 as outlined in SAE J517 (Hydraulic Hose Standard). If SAE requirements for wire reinforcement cannot be met, wire reinforcement diameter shall be 17.78 mm. 4.6 Property And Performance Requirements Unless othe
24、rwise specified, all tests will be performed per SAE J343 and indicated ASTM Test Methods. See Table 2 for material property requirements of the tube and cover. NUMBER: MPAPS F-6012 TITLE: Power Steering High Pressure Hose REVISION: 1702 This document is restricted and may not be sent outside Navist
25、ar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2017 by Navistar, Inc. FEBRUARY 2017 Page 5 of 10 TABLE 2 PROPERTIES OF TUBE AND COVER PROPERTIES OF TUBE AND COVER TEST METHOD (ASTM) TUBE Type I COVER* Type I TUBE T
26、ype III TUBE Type III Alt. Material COVER* Type III COVER* Type III Alt. Material POLYMER D1418 CM (CPE) CM (CPE) CM (CPE) ORIGINAL PROPERTIES: HARDNESS, DUROMETER, SHORE A D2240 60-75 65-75 55-75 80-90 65-70 75-80 TENSILE STRENGTH, MPA (PSI) D412, DIE C 7.0(1015) 10(1450) 6.0(870) 6.0(870) 7.0(1015
27、) 7.0(1015) ELONGATION, PERCENT MIN D412, DIE C 250 250 250 130 175 450 100% MODULUS, MPa (PSI), MIN D412, DIE C Report* Report* Report* Report* Report* Report* HEAT AGING CONDITIONS AND CHANGE LIMITS HOURS EXPOSURE D865 168 168 168 168 168 168 TEMPERATURE, C (F) D865 135(275) 135(275) 150 (302) 150
28、 (302) 150 (302) 150 (302) HARDNESS, DUROMETER, SHORE A D2240 0 to 18 0 to 20 0 to 10 0 to 10 0 to 10 0 to 25 TENSILE STRENGTH, % MAX D412, DIE C -35 -20 -25 -25 -20 -20 ELONGATION, % MAX D412, DIE C -65 -60 -40 -75 -40 -100 100% MODULUS, % MAX D412, DIE C Report* Report* Report* Report* Report* Rep
29、ort* HEAT AGING, 1000 HOURS TEMPERATURE, C (F) D865 120(248) 120(248) 150 (302) 150 (302) 150 (302) 150 (302) ELONGATION, % MIN D412, DIE C 120 120 120 120 120 120 HARDNESS, MAX D2240 85 85 85 85 85 85 PROPERTIES AFTER IMMERSION IN MPAPS B-21 15W40 Engine oil (P/N 2643576R1, Shell Rimula Premium IFF
30、, 54267) HOURS D471 N/A 70 70 70 500 70 TEMPERATURE, C (F) D471 135(275) 135(275) 150 (302) 150 (302) 150 (302) 150 (302) HARDNESS, DUROMETER, SHORE A D2240 20 20 -15 -15 -15 -15 TENSILE STRENGTH, % MAX D412, DIE C -40 -40 -20 -20 -20 -20 ELONGATION, % MAX D412, DIE C -40 -40 -20 -40 -20 -79 100% MO
31、DULUS, % MAX D412, DIE C Report* Report* Report* Report* Report* Report* VOLUME CHANGE, shrink/swell, % D471 -10 TO +70 -10 TO +70 -3 TO +10 -3 TO +15 -3 TO +10 -3 TO +13 PROPERTIES AFTER IMMERSION IN MPAPS B-6810 Power Steering Fluid (P/N 2643472R1, Shell 20631) HOURS D471 N/A 70 70 70 500 70 TEMPE
32、RATURE, C (F) D471 135(275) 135(275) 150 (302) 150 (302) 150 (302) 150 (302) HARDNESS, DUROMETER, SHORE A D2240 20 20 -15 -15 -15 -15 TENSILE STRENGTH, % MAX D412, DIE C -40 -40 -20 -20 -20 -20 ELONGATION, % MAX D412, DIE C -40 -40 -20 -35 -20 -70 100% MODULUS, % MAX D412, DIE C Report* Report* Repo
33、rt* Report* Report* Report* VOLUME CHANGE, shrink/swell, % D471 -10 TO +70 -10 TO +70 -3 TO +10 -3 TO +28 -3 TO +10 -3 TO +26 COMPRESSION SET HOURS 70 70 70 70 70 70 TEMPERATURE C (F) 125(257) 125(257) 150(302) 150(302) 200(302) 200(302) PERCENT MAX, PLIED D395 25 50 50 55 50 85 * Report value deter
34、mined in qualification and validation testing. * - cover requirements may not be applicable to textile covered hose. N/A not applicable NUMBER: MPAPS F-6012 TITLE: Power Steering High Pressure Hose REVISION: 1702 This document is restricted and may not be sent outside Navistar, Inc. or reproduced wi
35、thout permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2017 by Navistar, Inc. FEBRUARY 2017 Page 6 of 10 4.7 Hose/Hose Assemblies Performance All hose and/or hose assemblies qualified to this specification shall meet the following requirements and
36、 shall be tested according to SAE J343 or ASTM D 380 unless otherwise indicated. 4.7.1 Proof Pressure 4.7.1.1 Method Assemblies shall be maintained at a min proof pressure equal to twice the max working pressure. Oil or water may be used. The hose assembly shall be held at the test pressure for 30-6
37、0 seconds. 4.7 1.2 Required No visible leakage. 4.7.2 Burst Pressure 4.7.2.1 Method Assemblies shall be pressurized to leakage or failure. The pressure rise shall be at a steady rate so that the minimum burst pressure of four times the maximum working pressure is reached within 15-30 seconds. 4.7.2.
38、2 Required No leakage or other indication of failure below the min burst pressure. 4.7.3 Impulse Test 4.7.3.1 Method Test per SAE J343 except as indicated below. Hose assemblies shall be installed in an impulse test machine using a 90 or 180 bend which shall conform to the minimum bend radius. Press
39、ure Variation: Type I, 0-.69 to 23.4 MPa (0-100 to 3400 psi) Type III, 0-.70 to 28.0 MPa (0-150 to 4060 psi) Test Fluid: MPAPS B-6810 Power Steering Fluid (P/N 2643472R1, Shell 20631); MPAPS B-21 15W-40 Engine oil (P/N 2643576R1, Shell Rimula Premium IFF, 54267); or approved equivalent. Fluid Temper
40、ature: Type I - 135 3C (275 5F) Type III - 150 3C (302 5F) Impulse Cycle Rate: Report please contact Materials Engineering for prior approval. 4.7.3.2 Required Assemblies shall withstand 500,000 cycles without leakage or malfunction. 4.7.4 Low Temperature Flexibility 4.7.4.1 Method Hose assemblies s
41、hall be subjected to a temperature of -40C (-40F) for a period of 24 hours in a straight position. While still at the specified temperature, the hose shall be evenly and uniformly bent through an angle of 180 around a mandrel whose diameter is twice the minimum bend radius. Mandrel shall be at the t
42、est temperature. Flexing shall be accomplished within four seconds for fabric reinforced hose and 8-12 seconds for wire reinforced hose. Samples shall then be returned to room temperature and proof pressure tested, and split longitudinally for inspection. 4.7.4.2 Required Hose shall not fracture or
43、visibly show any cracks, checks or breaks in the tube or cover. 4.7.5 Tensile Test - Assembly 4.7.5.1 Required Assemblies shall withstand a minimum tensile load of 5340 N (1200 lbf) -8 size without separation of the fittings or rupturing the tube. NUMBER: MPAPS F-6012 TITLE: Power Steering High Pres
44、sure Hose REVISION: 1702 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2017 by Navistar, Inc. FEBRUARY 2017 Page 7 of 10 4.7.6 Adhesion Test 4.7.6.1 Me
45、thod Unless otherwise indicated, adhesion tests shall be conducted using the apparatus and methods in accordance with ASTM D 413, static mass method at 23C 2C (73F 3.6F). The test pieces shall be prepared in accordance with ISO 8033. 4.7.6.2 Required A force of not less than 44.5 N (10 lbf) shall be
46、 required to separate the bond between adjacent layers of a 2.5 cm (1 in) wide ring section of the hose. 4.7.7 Length Change 4.7.7.1 Method Measure length at zero and at max working pressure specified at room temperature. 4.7.7.2 Required Hose shall not change in length more than +2 or -4%. 4.7.8 Co
47、rrosion Resistance 4.7.8.1 Method Perform 240 hrs salt spray testing per ASTM B117 on hose assemblies and 480 hrs on hose assembly installations as connected to the steering gear and the steering pump 4.7.8.2 Required 4.7.8.2.1. Hose assemblies. The target result for zinc and zinc nickel plated tube
48、s and fitting after testing is no red rust. For ZNi-C2 or ZNi-C3 plated tubes that are plated prior to forming, the actual performance is a function of the degree of forming. Some variation in performance from one design to the next may be expected. Therefor it shall be first demonstrated that the Z
49、inc- Nickel plating process is capable of meeting the MPAPS G-22 requirement using congruently plated test panels. The tube assemblies will then be tested and results documented. Tested tube assemblies may be judged acceptable if there are only a few spots of rust in areas prone to cracking when formed or if the rust spots can be attributed to assignable causes n
