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| Illustration 1 | g01109080 |
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Location of the Brake Accumulators for the Service Brakes (1) Left brake accumulator (2) Right brake accumulator | |
The accumulators for both the left and the right service brakes are located between the cab and the rear enclosure of the machine. Both accumulators are in a vertical position.
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| Illustration 2 | g01333233 |
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(3) Nitrogen charging valve
(4) Chamber for the nitrogen gas (5) Pressure oil chamber (6) Outlet to the service brake control valve (7) Piston | |
The two accumulators for the service brakes contain piston (7), which is sealed. The piston moves back and forth inside the bore of each accumulator. The chamber is charged to the proper precharge pressure through nitrogen charging valve (3).
Reference: Refer to The Testing and Adjusting Section for charging information.
Oil from the accumulator charging valve flows through outlet (6). The oil then enters pressure oil chamber (5). The oil then pushes piston (7). This piston movement causes the dry nitrogen gas to compress. When the pressure in the brake system reaches the cut out pressure, the supply of oil is stopped by the cut out valve.
When a brake pedal is depressed, oil from chamber (5) flows outward through outlet (6). This oil flows to the service brake control valve and the oil then applies the service brakes.