MIL-DTL-11891G(AT)
4.3.1.4 Roadwheel path and ground pad (vulcanized). The following qualification tests
will be performed on vulcanized track roadwheel path rubber and ground pads: hardness, tensile
strength (replaceable and integral pads only), elongation (replaceable and integral pads only),
tensile stress (replaceable and integral pads only), aged tensile strength (replaceable and integral
pads only), aged elongation (replaceable and integral pads only), ozone resistance, adhesion, and
blowout.
4.3.1.5 Samples for on-vehicle road test. On-vehicle road test qualification of replaceable
pad track systems (T154) requires 74 complete assemblies plus spares in accordance with
Appendix B. Excluding the T157I pads, contractors supplying pads only for qualification are
required to provide 74 pads plus spares in accordance with Appendix B. Contractors supplying
pads for T157I pad qualification are required to submit 164 samples plus spares in accordance
with Appendix D. On-vehicle road test qualification of integral pad track systems (Tl07) requires
50 complete assemblies plus spares in accordance with Appendix C. In addition 15 blocks are
required for blow-out testing in accordance with 3.3.4.12. All hardware submitted for on-vehicle
qualification shall be sent to the test site. Results of all tests listed in tables I and II shall be on file
for the on-vehicle test samples. The samples shall be representative of those produced with
equipment and procedures normally used in production.
4.3.1.5.1 Qualification sample size. The Government reserves the right to adjust the
qualification sample size specified in 4.3.1.5 based on vehicle availability and the number of
contractors attempting qualification.
4.3.2 On-vehicle-testing. For the on-vehicle test, replaceable track pad systems shall be
qualified on the T154 track configuration mounted on an M109 series vehicles (see Appendix B
for the replaceable track pad system test plan). Integral pad track shall be qualified on the T107
track mounted on an M88 series vehicle system (see Appendix C for the integral pad track test
plan). Extension of qualification to track models other than those directly tested are listed in
6.7.1. The T157I pads shall be qualified on a Bradley Fighting Vehicle (BFV) System. See
Appendix D for the T157I pad test plan.
4.3.3 Qualification approval. Track assemblies shall meet the requirements stated in
section 3. Failure to meet minimum requirements specified shall be cause for sample rejection.
Failure of any qualification sample to pass the specified inspections may be cause for refusal by
the Government to conduct additional inspections until it has been proved, to the satisfaction of
the Preparing Activity, that the faults revealed by the inspections have been corrected.
4.3.4 Retention of qualification. The Preparing Activity shall periodically review the
contractor's test and inspection data during the life of future production contracts to assure that
the results are equal or superior to those obtained during qualification testing. Any test results
22
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business