| |
| Illustration 1 | g03716592 |
|
Right Side of Tractor (1) Low-pressure accumulator (2) Dry nitrogen charging valve (3) High-pressure accumulator (4) Dry nitrogen end of the cushion-hitch accumulator (5) Hydraulic oil end of the cushion-hitch accumulator (6) Line to the leveling valve | |
Cushion-hitch low-pressure accumulator (1) and high-pressure accumulator (3) function as the shock absorber for the cushion-hitch. Low-pressure accumulator (1) reacts to machine movements when the carry pressure in the system is low. As the load increases, high-pressure accumulator (3) becomes active. Low-pressure accumulator (1) and high-pressure accumulator (3) absorbs sudden shocks from the load cylinder of the cushion-hitch. The cushion-hitch accumulators help control the vertical motion of the machine by absorbing shocks based on the accumulator pre-charge pressures.
The cylinder of low-pressure accumulator (1) and high-pressure accumulators (3) contains a sealed piston. The chamber above this piston is pressurized with dry nitrogen gas. As the cushion-hitch load cylinder retracts, oil from the head end of the cylinder enters the accumulator which moves the piston in low-pressure accumulator (1) and high-pressure accumulator (3) up which compresses the dry nitrogen gas. The compression of the dry nitrogen gas helps to absorb shocks.
The chamber below the piston contains hydraulic oil. Hydraulic oil from the leveling valve enters low-pressure accumulator (1) and high-pressure accumulator (3) through line (6).
The nitrogen charging valve (2) is used to charge the chamber above the piston with dry nitrogen gas.