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. 2015 by Navistar, Inc. JUNE 2015 Page 1 of 5 NAVISTAR, INC. Material, Parts, and Process Specifications
2、(MPAPS) NUMBER: MPAPS S-L-21.101-GS/PL Former Designation: ESP-L-21.101-GS TITLE: Lubrication Fittings - English Series (Noun Code 3300) CURRENT REV No.: 1506 DATE: June 2015 WRITTEN/EDITED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES: ESP-L-21.101-GS - August 2006 PRINTED
3、 COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION This specification 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 hea
4、lth practices and to determine the applicability of regulatory limits prior to use. Change Notice: Changed to New MPAPS format; Combined GS, PP, NPP. 1.0 GENERAL: This standard covers complete general and dimensional specifications for the various types of lubrication fittings and related threaded c
5、omponents. 2.0 CONTENTS: Page General 1 Policy for Selecting Parts for New Design 1 Designations 2 Dimensions and Tolerances 2 Contours 2 Pipe Threads 2 Material and Manufacture 3 Finish 3 Restricted Chemical Substances 3 Workmanship 3 Dimensions and Part List 3 Technical Information 5 3.0 POLICY FO
6、R SELECTING PARTS FOR NEW DESIGN: Approved parts are so designated to reduce variety of parts and assure maximum availability, interchangeability, and cost savings in volume buying. For new design, parts shall be selected from “Approved“ part list only. Configuration: Straight or Elbow (plain or ven
7、ted) Threads: 1/8-27 Dry seal 1/4-18 Dry seal 1/4-28 Taper 1/8-27 Thread Forming 1/4-28 Thread Forming Drive Fittings with shank diameter .194 or larger. NUMBER: MPAPS S-L-21.101-GS/PL TITLE: Lubrication Fittings REVISION: 1506 This document is restricted and may not be sent outside Navistar, Inc. o
8、r reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2015 by Navistar, Inc. JUNE 2015 Page 2 of 5 Check Valve: Located in tip Source: Multiple 4.0 DESIGNATIONS: Lubrication fittings are designated by the type and size of the threa
9、ded ends and the configuration of the fitting. 5.0 DIMENSIONS AND TOLERANCES: Tabulated dimensions will apply to the finished parts, plated or otherwise processed, as specified by the purchaser. Tolerance on all dimensions not otherwise limited will be plus and minus. 01 inch. The maximum and minimu
10、m across flats dimensions will be within the commercial tolerance of bar or extruded stock from which the fittings are produced. The minimum across corners dimensions of hexagons will be 1.092 times the nominal width across flats but will not result in a side flat width less than .43 times the nomin
11、al width across flats. 6.0 CONTOUR: Details of contour will be optional with manufacturer provided the tabulated dimensions are maintained and serviceability of the fittings is not impaired. 7.0 PIPE THREADS: The pipe threads on fittings, unless there is specific authorization to the contrary, will
12、conform with the specifications given in detail in SAE Standard, Dryseal Pipe Threads, SAE J476, for the designated thread series, except that external thread crests may have greater maximum truncation due to manufacturing practices. Experience has shown that the crest of the threads on lubrication
13、fittings intended for use with grease, does not have to conform to Dryseal American Standard Form to function satisfactorily. The deviations from standard Dryseal practice are peculiar to lubrication fittings and as special considerations are involved, it is not advisable to use these deviations in
14、any other application of pipe thread practice. External pipe threads will be chamfered from a diameter (rounded to a two-place decimal) obtained by subtracting .016 inch from the minimum minor diameter at small end, with a minus tolerance on the diameter of .02 inch, to produce a length of chamfered
15、 or partial thread equivalent to 1 to 1-1/2 times pitch (rounded to a three-place decimal). See Appendix A of SAE Standard, Dryseal Pipe Threads -SAE J476. Internal pipe threads will be countersunk 90 degrees included angle to a diameter (rounded to a two-place decimal) obtained by adding .016 inch
16、to the maximum major diameter at large end with a plus tolerance on the diameter of .02 inch. See Appendix A of SAE Standard, Dryseal Pipe Threads - SAE J476. Recommended assembly considerations for the various combinations of Dryseal pipe threads are given under the respective standard thread serie
17、s and the paragraph headed Limitation of Assembly, Appendix D, in SAE Standard, Dryseal Pipe Threads - SAE J746. External taper threads designated SAE-LT will be Unified Standard Form 1/4-28 with .75 inch, plus and minus .06 inch, diametral taper per 12 inches of length. The pitch diameter measured
18、at start of thread on small end will be .2257 - .2224 inch. Threads will be chamfered .036 - .054 inch long from a diameter of .20 inch, with a tolerance of minus .02 inch. It is recommended that SAE-LT taper threads be assembled into 1/4-28 UNF, Class 3B, straight threaded holes having modified max
19、imum minor diameter of .2152 inch to insure 75% minimum thread height. NUMBER: MPAPS S-L-21.101-GS/PL TITLE: Lubrication Fittings REVISION: 1506 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are r
20、equired to assume all patent liability. 2015 by Navistar, Inc. JUNE 2015 Page 3 of 5 External threads designated 1/8 Pipe Special Thread Forming thread will have 90 degrees thread form with 27 threads per inch and a diametral taper of 10 degrees. The root diameter at the small end will be .342 - .33
21、5 inch. Threads will be chamfered .037 - .055 inch long from a .32 inch diameter, with a tolerance of minus .02. Due to the multiple complexities involved in the proper installation of fittings having these threads, users should consult manufacturers with regard to hole recommendations and other con
22、siderations affecting assembly. General practice is to mark or color these fittings for identification. External threads designated 1/4-28 Special Taper Drive Thread will have 90 degrees thread form with 28 threads per inch and a diametral taper of 10 degrees. The root diameter of thread at small en
23、d will be .208 - .201 inch. Threads will be chamfered .036 - .054 inch long from a diameter of .20 inch with a tolerance of minus .02 inch. Due to the multiple complexities involved in the proper installation of fittings having these threads, users should consult manufacturers with regard to hole re
24、commendations and other considerations affecting assembly. 8.0 MATERIAL AND MANUFACTURE: Unless otherwise specified, fittings will be made from steel standard with the manufacturer. At manufacturer option, caps for water pump fittings may be made from brass, steel or aluminum. The greasing end of fi
25、ttings will be hardened. The threaded end on 1/8 pipe or 1/4 pipe special thread forming fittings will be hardened. They will have a case depth of .005 to .009 inch and minimum hardness of 83 on Rockwell 15N scale. 9.0 FINISH: As designated by part number, fittings will be furnished plated in accord
26、ance with MPAPS and class listed below. Zinc Trivalent (ZN6A) on steel MPAPS G-20, Class 6A. 10.0 RESTRICTED CHEMICAL SUBSTANCES: Effective January 1, 2007, all product supplied to the requirements of this specification must comply with the requirements of the MPAPS B-50 specification. 11.0 WORKMANS
27、HIP: Fittings will be free from burrs, loose scale, sharp edges and all other defects that might affect their serviceability. 12.0 DIMENSIONS AND PART LIST: 12.1 Straight Fittings: (Arranged by Nominal Size and Overall Length) NUMBER: MPAPS S-L-21.101-GS/PL TITLE: Lubrication Fittings REVISION: 1506
28、 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. 2015 by Navistar, Inc. JUNE 2015 Page 4 of 5 12.1.1 Approved: 1/8 Dryseal Thread Part Number Description
29、 C Length .04 S Shank .03 E Effective Thd Min D Hex 109461 1/8-27 PTF SAE Special Extra Short .66 .28 .188 .438 109454 1/4-28 SAE LT .54 .18 .109 .312 Q 3657 1/8-27 NPTF Leak proof - 5,000 lbs. Pressure .84 .38 .28 .438 12.2 Elbow Fittings: (Arranged by Size, Angle, and Length) 12.2.1 Approved: 1/8
30、Dryseal Thread Part Number Description C Length .04 S Shank .03 E Effective Thd Min D Hex G Swing Radius F Angle 126152 1/8-27 PTF SAE Special Short .88 .28 .219 .438 .406 45 109460 1/8-27 PTF SAE Special Short .88 .28 .219 .438 .500 65 109462 1/8-27 PTF SAE Special Short .84 .28 .219 .438 .531 90 1
31、2.3 Straight Drive Type: (Arranged by Shank Diameter) 12.3.1 Not for New Design: Part Number Description C Length .04 S Shank .03 G Shank Dia Min .003 D Shoulder Dia 271432 For 1/4 Hole - less Ball Check .47 .12 .257 .344 NUMBER: MPAPS S-L-21.101-GS/PL TITLE: Lubrication Fittings REVISION: 1506 This
32、 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. 2015 by Navistar, Inc. JUNE 2015 Page 5 of 5 12.3.2 Approved: Air Vents Part Number Description C Length .04
33、S Shank .03 E Effective Thd Min D Hex Cap Color Code 110891H 1/8-27 PTF SAE Special Short 1.00 .26 .234 .438 Gold Valve Type - Open at 7/16 lbs 91916R91 3/8-PTF SAE Special Short 1.50 .52 .27 .750 Breather Type - 2 Baffles 12.4 Elbow Drive: (Arranged by Size, Angle, and Length) 12.4.1 Approved: 1/8
34、Pressure Shut-Off Elbow Part Number Description C Length .04 S Shank .03 E Effective Thd Min D Hex G Swing Radius F Angle 62022R91 1/8-27 PTF SAE Special Short 5-20 lbs Pressure 1.00 .188 .188 .625 .562 60 13.0 TECHNICAL INFORMATION: For further information related to the technical content of this s
35、pecification, contact: Suppliers may purchase controlled copies of this specification by contacting: Materials Engineering and Technology Dept. 10400 W. North Avenue Melrose Park, IL 60160 E-mail: MaterialsEngineeringN IHS Global Inc. 15 Inverness Way East Englewood CO 80112-5776 Phone: 1-800-854-7179 E-mail: AutomotiveIHS.com Website: http:/
