scope:

This specification covers the general requirements, property and performance requirements, quality, qualification, source approval, and quality control for cab insulators and composite heat shields.

NOTE: For existing engineering drawings/blueprints which reference this specification but do not specify a Type (I, II, III, IV, V, VI, VII, VIII, IX, X, or XI), Type I

Restricted Chemical Substances

All product supplied to the requirements of this specification must comply with the requirements of the MPAPS B-50 specification.

APPLICATION

This specification outlines the requirements for interior cab insulation, which is used as a thermal barrier to improve the heating and cooling characteristics of the cab. Several types of thermal insulation/heat shields are included in this specification. If a specific insulation material is required, it shall be described on the print.

Note: This specification is for thermal insulators and heat shields. Although some of these materials may have acoustic benefits (see note on acoustic insulation below), materials with specific acoustic requirements may be found in these specifications: Cab floor and dash insulation is covered in MPAPS L-6606, urethane foam insulation in MPAPS L-6505, molded fiberglass engine tunnel cover and external cab insulators in MPAPS L-6609, and other acoustic insulation in MPAPS L-6612.