MIL-T-2452 Trucks, Refuse Collection: Compaction Type, Rear Hopper Loading, With Tilt Cab, Diesel And Gasoline Engine Driven, 19,000 To 44,500 Pounds Gvw, 4X2 And 6X4, 10 To 25 Yard, CommercialThis specification covers diesel gasoline engine driven, 4-wheel, 2-rear wheel drive and 6-wheel, 4-rear wheel drive, commercial, compaction type, refuse collection trucks having a minimum gross vehicle weight GVW 19,000 to 44,500 pounds. The bodies shall be of 10- through 25-cubic yard minimum rated capacities with rear hopper loading. Vehicles procured under this specification are commercial items which shall be warranted by the manufacturer as specified in acquisition documents.

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MIL-T-2452J

3.4.11 Brakes. The brakes shall conform to Federal Motor Carrier Safety Regulations

393.40 through 393.43 and 393.45 through 393.52. When available as the manufacturer's standard or as an option, brake linings shall be of nonasbestos material.

3.4.11.1 Power hydraulic or air type. Class A vehicles shall be equipped with either power assisted, hydraulically actuated, four-wheel service brakes or full-air brakes.

3.4.11.1.1 Split hydraulic brake system. When power hydraulic brakes are furnished, the brake system shall be so arranged as to provide separate systems for at least two wheels and so designed and constructed that rupture or leakage type failure of any single pressure component of the service brake system, except structural failures of the brake master cylinder body, effectiveness indicator body, or other housing common to the divided system, will not result in complete loss of function of the vehicle brakes when force on the brake pedal is continued. "Pressure component" means any internal component of the brake master cylinder or master control unit, wheel brake cylinder, brake line, brake hose, or equivalent, except power assist components.

3.4.11.1.2 Indicator light. The split hydraulic brake system shall be equipped with an electrically operated red light mounted on the instrument panel to indicate system effectiveness. The light shall have an area of not less than 0.196 square inch. It shall illuminate before or upon application of the brakes when an actuating-pressure component of the system has sustained a loss of pressure. The indicator light system shall include a means for testing by the vehicle operator to assure that the light bulb is operable.

* 3.4.11.2 Air brakes. Class B, C, D and E vehicles shall be equipped with full-air brakes on all wheels. The braking system, complete with all necessary components, shall include:

(a)

Air compressor, unloader-head type, engine driven and engine lubricated, air- or water-cooled, and having a capacity of not less than 7-1/4 cubic feet per minute

(b)

(cfm) for classes A and B and not less than 12 cfm for classes C, D and E

Air storage reservoir(s), each tank equipped with a drain and with safety and check

(c)

valves between the compressor and the last reservoir tank.

Foot control, suspended or treadle type

(d)

(e)

Air control valves

Air-pressure gage, visible to the driver