MIL-DTL-11891 Track Shoe Sets, Track Shoe Assemblies, Track Shoe Pads And Track Shoe Bushings, Vehicular: ElastomerizedThis specification identifies the requirements for qualification and production control of track systems supporting U.S. Military Tracked Vehicles. This specification is intended primarily for the qualification of elastomeric compounds used in the fabrication of track and track components and to ensure that the quality and performance established at qualification is maintained throughout production. The contractor is held fully responsible for the entire assembly/component including all non-elastomeric components and fasteners.

Pages 1 - - 39 - 40 - 41 - 42 - 43 - 44 - 45 - 46 - 47 - 48 - 49 - 50 - 51 - 52 - 53 - 54 - 55 - 56 - 57|||

MIL-DTL-11891G(AT)

APPENDIX A

BUSHING ENDURANCE TEST PLAN

A.1 SCOPE

A.1.1 Scope. This appendix details the test procedures for testing contractor supplied

T130E1 (P/N 11678029) long bushings for qualification. Those compounds successfully meeting

these requirements will be listed on the Qualified Products List (QPL-11891) with the source and

address. This appendix is a mandatory part of the specification. The information contained herein

is intended for compliance.

A.2 APPLICABLE DOCUMENTS

A.2.1 Drawings.

11678029

- Bushing.

A.3 REQUIREMENTS

A.3.1 Test site. Unless otherwise notified, qualification testing will be conducted at the

Michigan Technological University, Keweenaw Research Center (KRC) , Houghton County

Airport, Calumet, Michigan 49913, (906) 487-2628.

A.3.2 Hardware requirements. Contractors submitting bushing samples for qualification

in accordance with the following procedures are required to provide fifteen (15) T130El long

bushings fabricated in accordance with Drawing Number 11678029. In addition, each contractor,

at his option, will supply one (1) quart of the insertion lubricant of their choice to be used by the

test facility during insertion of the candidate bushings into the simulated bore described below. If

no lubricant is provided, Flexon 845 will be used by the test site personnel.

A.3.3 Test procedures.

A.3.3.1 Notification. Upon receipt of contractor supplied bushing samples intended for

qualification testing, test site personnel will notify TACOM, AMSTA-TR-E/BLUE,

(810) 574-8745. No qualification testing shall begin until AMSTA-TR-E/BLUE provides written

authorization for testing to proceed.

A.3.3.2 Inspection of samples. Prior to the start of test, test site personnel will inspect

each of the 15 sample bushings to ensure conformance to Drawing Number 11678029 and that no

damage has occurred to the samples in shipment. Test site personnel will record the following

information: