HYDRAULIC PUMP PRESSURE LINE TEE-TO-HYDRAULIC ACCUMULATOR OIL LINE

TM 5-2420-222-20-1

HYDRAULIC SYSTEM - CONTINUED

Routes high pressure hydraulic fluid from hydraulic pump pressure line tee, through hydraulic accumulator tee,

where it is connected to hydraulic accumulator and accumulator tee-to-steering valve oil line.

HYDRAULIC ACCUMULATOR

Connected through high pressure oil lines to hydraulic pump, steering valve, and pressure control valve.

Pressure tight cylinder with sealed floating piston.

One side of floating piston is precharged with dry nitrogen.

Other side of floating piston is filled with hydraulic fluid from hydraulic system.

As hydraulic system fluid pressure builds up, dry nitrogen is compressed to equalize pressure on both sides of

floating piston.

Compressed dry nitrogen absorbs surge pressure when hydraulic cylinders reach end of travel or control valves are

returned to neutral.

When hydraulic fluid pressure drops due to demand on system or engine shutdown, dry nitrogen expands to slow

pressure loss.

During 0.2-second delay between demand on system and hydraulic pump start into stroke, dry nitrogen expansion

discharges fluid under pressure into system, smoothing out operation.

TA242704

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