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. 2014 by Navistar, Inc. August 2014 Page 1 of 2 NAVISTAR, INC. Material, Parts, and Process Specification
2、s (MPAPS) NUMBER: MPAPS BT-29 Former Designation: CEMS BT-29 TITLE: Test for Leak Stoppage of Cooling System Stopleak Compounds CURRENT REV No.: 1408 DATE: Aug 2014 WRITTEN/EDITED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES: CEMS BT-29 - August 2009 PRINTED COPIES OF THIS
3、 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 health practices a
4、nd to determine the applicability of regulatory limits prior to use. Change Notice: Updated to new MPAPS format; editorial changes. 1.0 APPLICATION This method covers a test procedure for determining the ability of cooling system stopleak compounds to temporarily stop leaks. 2.0 SCOPE This test meth
5、od describes the test procedure for evaluating stopleak compounds. 3.0 APPARATUS 3.1 Test container: a one-quart cylindrical tin-coated steel can, such as a paint can, with four 1/32-inch diameter holes drilled at approximately one inch from the bottom of the can and equally spaced around its perime
6、ter. All burrs are to be removed from the edges of the holes. 3.1 Electric stirrer, variable speed having a two-blade impeller 1-3/4 inches in diameter 3.2 Pan or tray to collect draining 3.3 Wooden dowel rod or pencil, 1/4 inch diameter by 6 inches long 3.4 Pyrex beaker, 1000 milliliters 3.5 Gradua
7、ted cylinder, 1000 milliliters 3.6 Balance capable of weighing to a sensitivity of 0.1 gram 3.7 Hot plate or laboratory burner 4.0 MATERIAL 4.1 Test Fluid A: Use a representative sample based on a mixture of one pellet (Type 1) or one container (Type 2) and 20 quarts (640 ounces) of distilled water.
8、 4.2 Test Fluid B: Use a representative sample based on a mixture of one pellet (Type 1) or one container (type 2) and 20 quarts (640 ounces) of a 50/50 mixture of distilled water and MPAPS B-1, Coolant Concentrate, Ethylene Glycol Base. 5.0 PROCEDURE 5.1 Heat 800 milliliters each of Test Fluids A a
9、nd B to 180 5 degrees Fahrenheit. Thoroughly mix until stopleak is completely dispersed. NUMBER: MPAPS BT-29 TITLE: Test For Leak Stoppage Of Cooling System Stopleak Compounds REVISION: 1408 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from
10、Corporate Technical Standards. Suppliers are required to assume all patent liability. 2014 by Navistar, Inc. August 2014 Page 2 of 2 5.2 Pour the hot mixture into the test container, which is suspended over the pan or tray, and immediately lower the stirrer to within one inch of the bottom of the co
11、ntainer and stir at a speed of 1000 to 1500 revolutions per minute. 5.3 Observe the time required to completely stop leakage from all holes (disregard occasional seepage). 5.4 At the end of 1-minute stirring, sharply strike the side of the test container with the wooden rod at approximately one inch
12、 from the bottom. Observe the time required to stop all leakage (again disregard all occasional seepage). 5.5 Continue stirring for 5 minutes observing for leaks other than occasional seepage. 5.6 At the end of the 5-minute stirring, again sharply strike the side of the test container with the woode
13、n rod and observe the time it takes to re-stop leakage from all four holes. 6.0 REPORT Report the time to stop leaks in seconds for each test fluid mixture - After: 6.1 Start of stirring; 6.2 1 minute of stirring; 6.3 5 minutes of stirring. 7.0 TECHNICAL INFORMATION For further information related t
14、o the technical content of this specification, 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:/
