SPACER 1F1609 - Caterpillar

Illustration 1 g00522244
Location of the accumulator charging valveThe accumulator charging valve is located on the front frame rail under the engine.
Illustration 2 g00522278
Accumulator charging valve at cut-in pressure (1) Accumulator port "A" (2) Passage (3) Spool in cutoff valve (4) Pump port "P" (5) Spool in the cut-in valve (6) Signal port "PS" behind pump port (7) Orifice (8) Passage (9) Tank drain "T" (10) Passage (11) Spring (12) SpringSupply oil for the steering accumulators is also sent to accumulator port (1). While the steering piston pump is charging the steering accumulators, the signal pressure at accumulator port (1) is not high enough to compress spring (11). The spool in cutoff valve (3) blocks pump port (4) and signal port (6) from orifice (7) and from tank drain (9). Pump port (4) and signal port (6) are open to each other through internal passages that are in the cutoff valve. Pump pressure travels from pump port (4) to signal port (6). Signal port (6) sends signal pressure to the pressure compensator valve. Signal pressure at the pressure compensator valve will keep the steering piston pump at maximum output.The signal pressure at accumulator port (1) also flows into passage (2). The oil pushes on the spool in the cut-in valve (5). When the signal pressure reaches the cut-in pressure, spring (12) is compressed by the pressure. The